CN112645380A - Nano-scale indium hydroxide and preparation method thereof - Google Patents
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Abstract
The invention provides a nano indium hydroxide and a preparation method thereof; the preparation method comprises the following steps: a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide. Compared with the prior art, the preparation method provided by the invention adopts a hydrothermal method to treat the indium hydroxide slurry, and synthesizes the indium hydroxide with the nanometer cubic morphology by controlling the content of indium ions and the change of pH value in a reaction system, and the product has complete morphology and structure, uniform size distribution and good fluidity; meanwhile, no additive is used, the reaction condition is mild, the purity of the product is improved, the method is suitable for industrial production, and the economic value is high.
Description
Technical Field
The invention relates to the technical field of indium hydroxide synthesis and preparation, in particular to nanoscale indium hydroxide and a preparation method thereof.
Background
Nanomaterials are always the hot point of research in the field of materials, and show excellent physical and chemical properties due to the unique structure and morphology. The nanometer indium hydroxide is widely applied to the fields of glass, ceramics, alkaline batteries, ITO and the like, especially the research and synthesis of the nanometer indium hydroxide with special appearance and regular structure have important significance in both scientific research and production.
At present, the preparation method of nano-scale indium hydroxide mainly comprises a neutralization precipitation method, a sol-gel method, an electrolytic method and the like, but because the synthesized indium hydroxide particles have small size and incomplete structure, serious agglomeration is easy to cause; the synthesis of the nano indium hydroxide with special appearance and regular structure is more difficult. For example, chinese patent publication No. CN101654278A discloses a method for synthesizing indium hydroxide nano-blocks, which comprises placing initial solution of reaction in a hydrothermal kettle for high-temperature and high-pressure aging by using proline as an additive and indium nitrate and sodium hydroxide as raw materials to obtain indium hydroxide nano-blocks; however, the technical scheme adopts the biological reagent as the additive, which not only reduces the purity of the indium hydroxide, but also causes a large amount of organic wastewater during the scale production. The Chinese patent with the publication number of CN106732517A discloses a preparation method of an indium hydroxide photocatalyst with a regular cubic structure, indium chloride and urea are fully mixed, then a hydrothermal method is adopted for high-temperature and high-pressure reaction, the hydrothermal temperature is controlled to be 180-220 ℃ and the hydrothermal time is controlled to be 12-72 h, and indium hydroxide with a cubic structure is synthesized; however, the product prepared by the technical scheme has uneven size distribution and particle size larger than 1 μm, and the description of the embodiment shows that the hydrothermal reaction temperature is high, the hydrothermal reaction time is long, and the yield is low due to low indium content in the reaction system, so that the method is not suitable for large-scale production.
Disclosure of Invention
In view of the above, the present invention provides a nanoscale indium hydroxide and a preparation method thereof, and the preparation method provided by the present invention does not use additives, has mild reaction conditions, not only improves the purity of the product, but also is suitable for industrial production, and has the advantages of complete product morphology and structure, uniform size distribution, and good fluidity.
The invention provides a preparation method of nano indium hydroxide, which comprises the following steps:
a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide.
Preferably, the method for preparing the indium hydroxide slurry in step a) is selected from a neutralization precipitation method or an electrolysis method.
Preferably, the process of the neutralization precipitation method specifically comprises the following steps:
firstly, preparing 1-2L of 0.8-1 mol/L indium nitrate solution and 1.5-2.5L of dilute ammonia water with the concentration of 6-8 wt%; adding 0.5L-1.5L of pure water into a 4L-6L beaker, starting to heat and keeping the temperature at 50-70 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6-7, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 1.5-2.5 h; after the dropwise adding is finished, continuously aging and reacting for 3-5 h to obtain indium hydroxide slurry.
Preferably, the process of the electrolytic method specifically comprises the following steps:
the anode and the cathode are simultaneously arranged in an electrolytic chamber, and the electrode distance between the anode and the cathode is kept between 20mm and 40 mm; then, adding an ammonium nitrate aqueous solution with the pH value of 2-4 and the concentration of 2.5-3 mol/L into the electrolytic chamber, heating the electrolytic chamber to 60-70 ℃, turning on a power supply, and setting the current density to be 450A/m2～550A/m2And continuously electrolyzing for 14-16 h to obtain the indium hydroxide slurry.
Preferably, the concentration of the indium hydroxide slurry in the step a) is 10g/L to 200 g/L.
Preferably, the indium hydroxide slurry in step a) has a D50 of less than 1 micron.
Preferably, the indium-containing solution in step a) is selected from one or more of an indium nitrate solution, an indium sulfate solution and an indium chloride solution.
Preferably, the pH adjusting agent used for adjusting the pH of the system in step a) is selected from nitric acid, sulfuric acid, hydrochloric acid, sodium hydroxide solution or ammonia water.
Preferably, the temperature of the hydrothermal reaction in the step a) is 150-200 ℃ and the time is 1-5 h.
The invention also provides nanoscale indium hydroxide which is prepared by the preparation method of the technical scheme.
The invention provides a nano indium hydroxide and a preparation method thereof; the preparation method comprises the following steps: a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide. Compared with the prior art, the preparation method provided by the invention adopts a hydrothermal method to treat the indium hydroxide slurry, and synthesizes the indium hydroxide with the nanometer cubic morphology by controlling the content of indium ions and the change of pH value in a reaction system, and the product has complete morphology and structure, uniform size distribution and good fluidity; meanwhile, no additive is used, the reaction condition is mild, the purity of the product is improved, the method is suitable for industrial production, and the economic value is high.
Meanwhile, the preparation method provided by the invention has the advantages of simple process, easy operation and convenient condition control, and more importantly, the temperature and the time for synthesizing the cubic-structure nano-scale indium hydroxide by a hydrothermal method are effectively reduced; the method has important significance for researching the synthesis of indium hydroxide systematically, and is suitable for large-scale production.
Drawings
FIG. 1 is a process flow diagram of an overall solution provided by an embodiment of the present invention;
FIG. 2 is a scanning electron microscope image of nanoscale indium hydroxide provided in example 1 of the present invention;
FIG. 3 is a graph showing the particle size distribution of nanoscale indium hydroxide provided in example 1 of the present invention;
FIG. 4 is a scanning electron micrograph of the nanoscale indium hydroxide provided in comparative example 1;
FIG. 5 is a particle size distribution of the nano-sized indium hydroxide provided in comparative example 1;
FIG. 6 is a scanning electron microscope image of nanoscale indium hydroxide provided in example 2 of the present invention;
FIG. 7 is a graph showing the particle size distribution of nanoscale indium hydroxide provided in example 2 of the present invention;
FIG. 8 is a scanning electron micrograph of the nanoscale indium hydroxide provided in comparative example 2;
fig. 9 is a particle size distribution of the nano-sized indium hydroxide provided in comparative example 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of nano indium hydroxide, which comprises the following steps:
a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide.
Firstly, adding an indium-containing solution into indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, and adjusting the pH of the system to be 4-8 to obtain a reaction raw material mixture. In the present invention, the method for preparing the indium hydroxide slurry is preferably selected from a neutralization precipitation method or an electrolytic method.
In a preferred embodiment of the present invention, the indium hydroxide slurry is prepared by a neutralization precipitation method; the process of the neutralization precipitation method is preferably as follows:
firstly, preparing 1-2L of 0.8-1 mol/L indium nitrate solution and 1.5-2.5L of dilute ammonia water with the concentration of 6-8 wt%; adding 0.5L-1.5L of pure water into a 4L-6L beaker, starting to heat and keeping the temperature at 50-70 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6-7, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 1.5-2.5 h; after the dropwise adding is finished, continuously performing aging reaction for 3-5 h to obtain indium hydroxide slurry;
more preferably:
firstly, preparing 1.5L0.9mol/L indium nitrate solution and 2L diluted ammonia water with the concentration of 7 wt%; adding 1L of pure water into a 5L beaker, starting heating, keeping the temperature at 60 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6.5, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 2 hours; after the dropwise addition is finished, the aging reaction is continued for 4 hours to obtain indium hydroxide slurry.
In another preferred embodiment of the present invention, the method for preparing the indium hydroxide slurry is an electrolytic method; the process of the electrolytic method is specifically as follows:
the anode and the cathode are simultaneously arranged in an electrolytic chamber, and the electrode distance between the anode and the cathode is kept between 20mm and 40 mm; then, adding an ammonium nitrate aqueous solution with the pH value of 2-4 and the concentration of 2.5-3 mol/L into the electrolytic chamber, heating the electrolytic chamber to 60-70 ℃, turning on a power supply, and setting the current density to be 450A/m2～550A/m2Continuously electrolyzing for 14-16 h to obtain indium hydroxide slurry;
more preferably:
the anode and the cathode are simultaneously arranged in an electrolytic chamber, and the electrode distance between the anode and the cathode is kept to be 30 mm; then, adding 2.8mol/L ammonium nitrate aqueous solution with pH value of 3 into the electrolytic chamber, heating the electrolytic chamber to 65 deg.C, turning on the power supply, and setting current density at 500A/m2And continuously electrolyzing for 15h to obtain the indium hydroxide slurry. In the present invention, the size of the electrolytic cell is preferably 1000mm × 500mm × 150 mm.
In the present invention, the concentration of the indium hydroxide slurry is preferably 10 to 200g/L, and more preferably 50 to 150 g/L.
In the present invention, the D50 of the indium hydroxide slurry is preferably less than 1 micron.
In the present invention, the indium-containing solution is preferably one or more selected from an indium nitrate solution, an indium sulfate solution, and an indium chloride solution, and more preferably an indium nitrate solution. The source of the indium-containing solution is not particularly limited in the present invention, and commercially available products of the above indium nitrate solution, indium sulfate solution and indium chloride solution known to those skilled in the art may be used.
In the present invention, an indium-containing solution is added to the indium hydroxide slurry so that the mass ratio of the added indium ions to the indium hydroxide is 0.01% to 1%, preferably 0.2% to 0.7%.
In the present invention, the pH adjusting agent used for adjusting the pH of the system is preferably selected from nitric acid, sulfuric acid, hydrochloric acid, sodium hydroxide solution or ammonia water. The source of the pH adjuster is not particularly limited in the present invention, and commercially available products of the above nitric acid, sulfuric acid, hydrochloric acid, sodium hydroxide solution and ammonia water, which are well known to those skilled in the art, may be used. In the invention, the pH value of the adjusting system is 4-8, and preferably 6-6.5.
After the reaction raw material mixture is obtained, carrying out hydrothermal reaction on the obtained reaction raw material mixture; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide. The device for the hydrothermal reaction is not particularly limited, and a high-pressure hydrothermal reaction kettle known to those skilled in the art can be adopted.
In the invention, the temperature of the hydrothermal reaction is preferably 150-200 ℃, and more preferably 150-160 ℃; the hydrothermal reaction time is preferably 1 to 5 hours, and more preferably 3 hours. Therefore, the preparation method provided by the invention can effectively reduce the temperature and time for synthesizing the cubic-structure nano-scale indium hydroxide by a hydrothermal method.
The present invention is not particularly limited to the centrifugation, washing and drying processes, and the centrifugation, washing and drying processes for treating the hydrothermal reaction product may be performed according to the technical scheme well known to those skilled in the art.
The process flow diagram of the overall technical scheme provided by the embodiment of the invention is shown in figure 1. The preparation method provided by the invention has the advantages of simple process, easy operation and convenient condition control, and more importantly, the temperature and the time for synthesizing the cubic structure nano-scale indium hydroxide by the hydrothermal method are effectively reduced, so that the preparation method is the hydrothermal method for efficiently synthesizing the nano-scale cubic indium hydroxide; in addition, the invention discloses factors influencing the aging treatment of indium hydroxide with a certain size by a hydrothermal method in detail and comprehensively, controls the pH value or the content of free indium in a reaction system, and can effectively reduce the temperature and time of the aging treatment by the hydrothermal method; therefore, the method has important significance for systematic research on synthesis of indium hydroxide, is suitable for large-scale production, and has high economic value.
The invention also provides nanoscale indium hydroxide which is prepared by the preparation method of the technical scheme. According to the invention, the indium hydroxide slurry with D50 being less than 1 μm is aged by mainly adopting a hydrothermal method, and the synthesis of the regular cubic nano-sized indium hydroxide particles is realized at a lower temperature by controlling the content of free indium and the change of pH value in a reaction system, and the cubic nano-sized indium hydroxide particles have higher fluidity and uniform size.
The invention provides a nano indium hydroxide and a preparation method thereof; the preparation method comprises the following steps: a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide. Compared with the prior art, the preparation method provided by the invention adopts a hydrothermal method to process the indium hydroxide slurry, and synthesizes the indium hydroxide with the nanometer cubic morphology by controlling the content of indium ions and the change of pH value in a reaction system, so that the product has complete morphology and structure, uniform size distribution and good fluidity, and the defect of serious agglomeration of the indium hydroxide obtained by singly using a sol-gel method, a neutralization precipitation method, an electrolysis method and the like is overcome; meanwhile, the method adopts the indium-containing solution and common acid and alkali as raw materials for production, does not add other organic or biological reagents, has mild reaction conditions, improves the purity of the product, is suitable for industrial production, and has higher economic value.
Meanwhile, the preparation method provided by the invention has the advantages of simple process, easy operation and convenient condition control, and more importantly, the temperature and the time for synthesizing the cubic-structure nano-scale indium hydroxide by a hydrothermal method are effectively reduced; the method has important significance for researching the synthesis of indium hydroxide systematically, and is suitable for large-scale production.
In order to further illustrate the present invention, the following detailed description of the technical solutions provided by the present invention is provided with reference to examples.
Example 1
(1) Preparing indium hydroxide slurry with D50 being less than 1 mu m by adopting a neutralization precipitation method; the specific process is as follows: firstly, preparing 1.5L of 0.9mol/L indium nitrate solution and 2L of 7 wt% dilute ammonia water; adding 1L of pure water into a 5L beaker, starting heating, keeping the temperature at 60 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6.5, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 2 hours; after the dropwise addition is finished, the aging reaction is continued for 4 hours to obtain indium hydroxide slurry.
(2) Adding 400mL of indium hydroxide slurry with the concentration of 100g/L into a 500mL high-pressure hydrothermal reaction kettle, adding an indium nitrate solution to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.7%, adjusting the pH value to 6, and preserving the temperature at 150 ℃ for 3 hours; and centrifuging, washing and fully drying to obtain the indium hydroxide powder with the nanoscale cubic structure.
Through detection, the scanning electron microscope result of the indium hydroxide powder prepared by the preparation method provided by the embodiment 1 of the invention is shown in fig. 2, the particle size distribution result is shown in fig. 3, and the BET and D50 results are shown in table 1.
Comparative example 1
Preparing indium hydroxide powder by adopting a neutralization precipitation method; the specific process is as follows: firstly, preparing 1.5L0.9mol/L indium nitrate solution and 2L diluted ammonia water with the concentration of 7 wt%; adding about 1L of pure water into a 5L beaker, starting heating, keeping the temperature at 60 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6.5, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 2 hours; after the dropwise adding is finished, continuing the aging reaction for 4 hours; and centrifuging, washing and fully drying to obtain the indium hydroxide powder.
It will be examined that the scanning electron microscope results of the indium hydroxide powder prepared by the preparation method provided in comparative example 1 are shown in fig. 4, the particle size distribution results are shown in fig. 5, and the BET and D50 results are shown in table 1.
Example 2
(1) Preparing indium hydroxide slurry with D50 being less than 1 mu m by adopting an electrolytic method; the specific process is as follows: the anode and the cathode are simultaneously arranged in an electrolytic chamber, the size of the electrolytic chamber is 1000mm multiplied by 500mm multiplied by 150mm, and the electrode distance between the anode and the cathode is kept to be 30 mm; then, adding 2.8mol/L ammonium nitrate aqueous solution with pH value of 3 into the electrolytic chamber, heating the electrolytic chamber to 65 deg.C, turning on the power supply, and setting current density at 500A/m2And continuously electrolyzing for 15h to obtain the indium hydroxide slurry.
(2) Adding 400mL of indium hydroxide slurry with the concentration of 100g/L into a 500mL high-pressure hydrothermal reaction kettle, adding an indium nitrate solution to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.2%, adjusting the pH value to 6.5, and preserving the heat at 160 ℃ for 3 hours; and centrifuging, washing and fully drying to obtain the indium hydroxide powder with the nanoscale cubic structure.
Through detection, the scanning electron microscope result of the indium hydroxide powder prepared by the preparation method provided by the embodiment 2 of the invention is shown in fig. 6, the particle size distribution result is shown in fig. 7, and the BET and D50 results are shown in table 1.
Comparative example 2
Preparing indium hydroxide powder by an electrolytic method; the specific process is as follows: the anode and the cathode are simultaneously arranged in an electrolytic chamber, the size of the electrolytic chamber is 1000mm multiplied by 500mm multiplied by 150mm, and the electrode distance between the anode and the cathode is kept to be 30 mm; then, adding 2.8mol/L ammonium nitrate aqueous solution with pH value of 3 into the electrolysis chamber, heating the electrolysis chamber to 65 deg.C, and openingA power supply with a current density of 500A/m2Continuously electrolyzing for 15 h; and centrifuging, washing and fully drying to obtain the indium hydroxide powder.
It will be detected that the scanning electron microscope results of the indium hydroxide powder prepared by the preparation method provided in comparative example 2 are shown in fig. 8, the particle size distribution results are shown in fig. 9, and the BET and D50 results are shown in table 1.
TABLE 1 data of various properties of indium hydroxide prepared by the preparation methods provided in examples 1-2 and comparative examples 1-2
| Morphology of | BET(m2/g) | D50(μm) | |
| Example 1 | Cube | 16.78 | 0.51 |
| Comparative example 1 | Sphere-like shape | 50.14 | 1.47 |
| Example 2 | Cube | 12.65 | 0.45 |
| Comparative example 2 | Sphere-like shape | 53.85 | 2.10 |
As is apparent from the comparison of the particle size distribution diagrams, the agglomeration degree of the indium hydroxide particles after the hydrothermal treatment is obviously reduced, and the D50 is also obviously reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A preparation method of nano indium hydroxide comprises the following steps:
a) adding an indium-containing solution into the indium hydroxide slurry to ensure that the mass ratio of the added indium ions to the indium hydroxide is 0.01-1%, adjusting the pH of the system to 4-8, and then carrying out hydrothermal reaction; and centrifuging, washing and drying the obtained product to obtain the nano indium hydroxide.
2. The method according to claim 1, wherein the indium hydroxide slurry in step a) is prepared by a method selected from the group consisting of a neutralization precipitation method and an electrolytic method.
3. The preparation method according to claim 2, wherein the neutralization precipitation method comprises the following specific steps:
firstly, preparing 1-2L of 0.8-1 mol/L indium nitrate solution and 1.5-2.5L of dilute ammonia water with the concentration of 6-8 wt%; adding 0.5L-1.5L of pure water into a 4L-6L beaker, starting to heat and keeping the temperature at 50-70 ℃, simultaneously opening a stirring paddle, simultaneously dropwise adding indium nitrate and dilute ammonia water into the beaker, controlling the pH value of the solution to be 6-7, and controlling the dropwise adding speed of the indium nitrate to ensure that the indium nitrate is completely added within 1.5-2.5 h; after the dropwise adding is finished, continuously aging and reacting for 3-5 h to obtain indium hydroxide slurry.
4. The method according to claim 2, wherein the electrolysis process comprises:
the anode and the cathode are simultaneously arranged in an electrolytic chamber, and the electrode distance between the anode and the cathode is kept between 20mm and 40 mm; then, adding an ammonium nitrate aqueous solution with the pH value of 2-4 and the concentration of 2.5-3 mol/L into the electrolytic chamber, heating the electrolytic chamber to 60-70 ℃, turning on a power supply, and setting the current density to be 450A/m2～550A/m2And continuously electrolyzing for 14-16 h to obtain the indium hydroxide slurry.
5. The method according to claim 1, wherein the concentration of the indium hydroxide slurry in the step a) is 10 to 200 g/L.
6. The method according to claim 1, wherein the indium hydroxide paste in step a) has a D50 of less than 1 μm.
7. The method according to claim 1, wherein the indium-containing solution in step a) is one or more selected from the group consisting of an indium nitrate solution, an indium sulfate solution, and an indium chloride solution.
8. The method according to claim 1, wherein the pH adjusting agent used for adjusting the pH of the system in step a) is selected from nitric acid, sulfuric acid, hydrochloric acid, sodium hydroxide solution, and aqueous ammonia.
9. The preparation method according to claim 1, wherein the temperature of the hydrothermal reaction in step a) is 150 ℃ to 200 ℃ and the time is 1h to 5 h.
10. A nanoscale indium hydroxide produced by the production method according to any one of claims 1 to 9.
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| CN113277548A (en) * | 2021-05-21 | 2021-08-20 | 先导薄膜材料有限公司 | Battery-grade indium hydroxide and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108516578A (en) * | 2018-04-10 | 2018-09-11 | 郑州大学 | A kind of sub-micron indium oxide raw powder's production technology |
| CN111763951A (en) * | 2020-05-21 | 2020-10-13 | 先导薄膜材料（广东）有限公司 | Preparation method of nano indium hydroxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108516578A (en) * | 2018-04-10 | 2018-09-11 | 郑州大学 | A kind of sub-micron indium oxide raw powder's production technology |
| CN111763951A (en) * | 2020-05-21 | 2020-10-13 | 先导薄膜材料（广东）有限公司 | Preparation method of nano indium hydroxide |
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| CN113277548A (en) * | 2021-05-21 | 2021-08-20 | 先导薄膜材料有限公司 | Battery-grade indium hydroxide and preparation method and application thereof |
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Application publication date: 20210413 |