JPH06102557B2 - Infrared UV absorbing glass and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides an infrared and ultraviolet absorbing glass which has relatively high transparency and absorbs infrared and ultraviolet rays so as to have high habitability, high safety, and weight reduction. With respect to the manufacturing method, the present invention provides the above-mentioned glass and its manufacturing method which are useful not only for building window glass and various glass articles but also for vehicle window glass.

[Prior Art] In recent years, from the viewpoint of energy saving such as reduction of cooling load or deterioration and fading of organic substances, multi-functionalization such as reflection and absorption of infrared rays and ultraviolet rays has been added to the glass itself or the surface of the glass. There is a rapidly increasing need for sheet glass articles that are physically more comfortable.

Therefore, there being proposed in addition to conventional infrared radiation absorbing glass glass conscious ultraviolet absorbing further example in JP 64-18938 discloses at least expressed as Fe ₂ O ₃ 0.
A continuous stream of molten glass with 45% by weight of iron was sent, the redox conditions during the melting operation were controlled to give at least 35% of iron in the ferrous state, expressed as FeO, and the glass was subjected to shaping operations. Including shaping into flat glass products,
Moreover, the flat glass has a light transmittance of at least 65% and
Disclosed is a method for producing soda-coal-silica flat glass by a continuous method having an infrared transmittance of 15% or less,
It is preferable that the total iron content represented by Fe ₂ O _{3 in the} glass is less than 0.65%, or the sulfur content of the product glass represented by SO ₃ is less than 0.02%. And at least 0.45% by weight of total iron, expressed as Fe ₂ O ₃ , of which at least 50% is in the ferrous state, expressed as FeO, and less than 0.02% by weight, expressed as SO _3. Has sulfur,
Disclosed is a soda-lime-silica glass article having a light transmission of at least 65% and a total solar infrared transmission of 15% or less, wherein the glass article comprises 66 to 75% by weight.
SiO ₂ , 12-20% Na ₂ O, 7-12% CaO, 0-5% Mg
O, 0-4% Al ₂ O ₃ , 0-3% K ₂ O, 0-1% Fe
It is stated that those having a composition essentially consisting of 0 to 1.5% of ₂ O ₃ , and CeO ₂ , TiO ₂ , V ₂ O ₅ or MoO ₃ are described as being preferred. Further U.S. expressed in Patent No. 4701425 Patent weight percent, 60-80% of SiO _2, 10 to 20% of Na ₂ O, 0-10%
K ₂ O, 5-16% CaO, 0-10% MgO, 0-5% Al
₂ O ₃ , 0-0.5% SO ₃ , 0.29-0.6% Fe ₂ O ₃ , 0.1-1.5
% Of SnO _2, glass compositions are disclosed for absorbing infrared light and ultraviolet light consisting essentially of 0.1 to 1.6% of TiO _2.

[Problems to be solved by the invention]

As described above, for example, in JP-A-64-18938, the content of SO ₃ component is less than 0.02% by weight, and the infrared ray absorption of the desired infrared ray is absorbed by the melting operation means in the plate glass production by the ordinary float method. It is difficult to obtain glass and requires various complicated means steps such as a liquefaction step, a dissolution step, a fining step, a stirring chamber and a stirrer, and U.S. Pat. It is hard to say that the glass composition described above is a glass composition that is sufficiently easily strengthened, and it is hard to say that the glass composition is sufficiently excellent in absorbing infrared rays.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned drawbacks of the related art, and has a large thermal expansion coefficient, a Young's modulus and a Poisson's ratio and a small thermal conductivity. As well as
An infrared and ultraviolet absorbing glass which has sufficient absorption of infrared rays and ultraviolet rays, develops a relatively transparent rim system color tone, and has sufficient weather resistance and moldability, and an easily toughened infrared and ultraviolet absorbing glass. It provides a manufacturing method.

That is, the present invention is, in% by weight, substantially following _{oxides, 68~72% SiO 2, 1.6~3.0%} Al 2 O 3, 8.5~
11.0% CaO, 2.0-4.2% MaO, 12.0-16.0% Na ₂ O, 0.5-
3.0% K ₂ O, 0.10 to 0.30% SO ₃ , 0.65 to 0.75% Fe ₂ O ₃ , 0.20
~ 0.35% CeO ₂ , 0.2-0.4% TiO ₂ , the sum of these components is 98
% Or more and 70.0 to 74.0% SiO ₂ + Al ₂ O ₃ + Ti
Infrared UV absorbing glass, which is O ₂ , 12.0 to 15.0% CaO + MgO, and 13.5 to 17.0% Na ₂ O + K ₂ O. Also, in terms of 5 mm thickness, the visible light transmittance by the A light source is 70% or more, the solar radiation transmittance is 41 to 45%, the ultraviolet transmittance is 7 to 11%,
The infrared-ultraviolet-absorbing glass having a dominant wavelength of 509 to 515 nm and a stimulus purity of 3.5 or less. Further, in producing the infrared and ultraviolet absorbing glass, ilmenite as a raw material, and / or carbon as a trace amount of raw material,
Another object of the present invention is to provide a method for producing an infrared and ultraviolet absorbing glass, which is characterized by using at least one of metal powder or oxide such as Zn and Sn.

Here, 68% to 72% by weight of the SiO ₂ component is 68%
If it is less than 72%, it is likely that the surface will be burnt or the like and the weather resistance will be lowered, causing practical problems, and if it exceeds 72%, its easiness of strengthening will be lowered and melting will be difficult.
_The content of the ₂ O ₃ component in the range of 1.6 to 3.0% by weight means that if it is less than 1.6%, the weather resistance is lowered and the surface is liable to cause burns and the like, which causes practical problems. Since devitrification is likely to occur and the molding temperature range is narrowed, it becomes difficult to manufacture. The CaO content of 8.5 to 11.0% is that if less than 8.5%, the easy strengthening property deteriorates and it is insufficient as a fluxing agent. It becomes difficult to manufacture because it tends to be high and the melting temperature does not decrease the flow temperature, and if it exceeds 11%, devitrification is likely to occur, the molding work range becomes narrow, and manufacturing becomes difficult. 2.0-4.2% was 2.0
If it is less than%, the melting temperature rises and the operating range is narrowed, making it difficult to manufacture, and if it exceeds 4.2%, the easy strengthening property decreases, and the Na ₂ O component is set to 12.0 to 16.0% by weight, which is 12.0%. If it is less than 16%, the strengthening property is lowered, the moldability becomes difficult, and devitrification easily occurs, so the operating range is narrowed and it becomes difficult to manufacture.If it exceeds 16%, the weather resistance is lowered, and the surface is liable to burn, etc. The above problem will occur, and the K ₂ O content of 0.5 to 3.0% is 0.5%.
Easy reinforcing lowers less than are those in excess of 3.0% when the weather resistance is lowered and the cost becomes high, had a 0.10 to 0.30 percent of the SO ₃ component in weight percent, for example conventional melt at less than 0.10% In the case of defoaming or inhomogeneity, it can only be made to such an extent that it becomes insufficient, and if it exceeds 0.30%, it particularly affects the coloring state of glass, for example, it tends to shift to a yellowish or amberish color tone. This is because the greenish color tone of the period is not obtained, and it is preferable that it is around 0.15%, which is rather low even within the range. Fe ₂ O
0.65 to 0.75% by weight of the _three components is the amount of FeO component that absorbs infrared rays and F that secures the desired color tone by absorbing ultraviolet rays.
As a total amount with the e ₂ O ₃ component amount, in order to stably obtain the various optical characteristics described above, it is necessary to be together with other component amounts such as CeO ₂ and TiO ₂ , and if less than 0.65%, the action against the above Is inferior, because if it exceeds 0.75% is not preferable because it becomes particularly inferior in visible light transmittance, CeO ₂ and TiO ₂ components have an ultraviolet absorbing effect, and the CeO ₂ component is 0.20 to 0.35%, The content of TiO ₂ is 0.2 to 0.4% because it does not change the reduction rate in glass and the ultraviolet absorption capacity is Ce.
TiO ₂ component, which is smaller than O ₂ component, changes the reduction rate in glass comparatively greatly and gives sufficient UV absorption ability
By limiting the combination with the CeO ₂ component within the above-mentioned specific range, it is possible to efficiently obtain the desired characteristics with a small content, while hardly changing the conventional reduction rate, the valence of in a glass Ce ^4+, among Ce ^3+, as nearly colorless Ce ³⁺ becomes main, Fe in total iron described above
_{This is} for controlling the ratio of ₂ O ₃ and FeO so as not to reduce the transmittance in the visible light region as a whole and to achieve desired optical characteristics such as ultraviolet absorption and infrared absorption.

In addition, SiO ₂ , Al ₂ O ₃ , CaO, MgO, Na ₂ O, K ₂ O, Fe ₂ O ₃ , S
The reason why the sum of the components of O ₃ , CeO ₂ and TiO ₂ is set to 98% or more by weight is to control the trace components such as ZnO and SnO _{2 to an} amount not exceeding 2%. Of these, the V ₂ O ₅ component may be added as an optional component in an amount of about 0 to 0.25%, and the V ₂ O ₅ hardly changes the reduction rate and has a smaller ultraviolet absorption capacity than the CeO ₂ component and little influence. This is because it is used for fine adjustment in V. It is necessary to reduce the valence of V in glass to V ⁵⁺ which exhibits yellow and to be mainly V ³⁺ which exhibits green. is there.

In addition, the weight percentage of SiO ₂ + Al ₂ O ₃ + TiO ₂ is 70.0 to 74.0.
%, The weather resistance deteriorates when the content is less than 70%, and the easy strengthening property deteriorates when the content exceeds 74%.
The weight percentage of + MgO is set to 12.0 to 15.0% because CaO and MgO components are used to lower the melting temperature, and if less than 12%, the easy strengthening property deteriorates, and if it exceeds 15%, devitrification is likely to occur. It becomes difficult, Na ₂ O ＋ K ₂
The percentage of O is set to 13.5 to 17% because if it is less than 13.5%, the easy strengthening property will decrease, devitrification will occur easily, the working temperature range will be narrow in molding, and the manufacturing will be difficult. The cost is high and the cost is high.

Furthermore, in terms of 5 mm thickness, the visible light transmittance by the A light source is 70% or more, the solar radiation transmittance is 41 to 45%, the ultraviolet transmittance is 7 to 11%, the main wavelength is 509 to 515 nm, and the stimulation purity is 3.5 or less. It is preferable that the visible light transmittance is
When it is 70% or less, it is not preferable because the visibility of the glass particularly in the windshield of an automobile, especially when the nightfall, nighttime or rain falls, is likely to cause the deterioration of the distinguishability of the object, and more preferably around 75%. 45% rate
If it exceeds, it will not be possible to increase the cooling load or improve the comfortability in the vehicle / indoors, and if it is less than 41%, it may affect the transparency and the aforementioned deterioration of the distinctiveness or the color tone. If the UV transmittance exceeds 11%, it is easy to lead to deterioration of habitability due to human influence such as discoloration / deterioration of articles inside or inside the vehicle or skin burn, and if the UV transmittance is less than 7%, for example, the above-mentioned solar radiation transmittance is obtained. If the main wavelength exceeds 515 nm, the yellow or amber color will not affect the desired green tone system, and if it is less than 509 nm, the blue color will win too much and the desired green tone will be generated. This is because the system does not become a system, and when the stimulus purity exceeds 3.5, the identification of the object decreases and the visibility of the occupant is impaired due to, for example, nightfall or overcast rain, ensuring safety, etc. Difficulty It is to become. The ultraviolet range was 290 to 390 nm, and the visible range was the same as before.

Furthermore, in producing the infrared and ultraviolet absorbing glass, it is preferable to use ilmenite as a raw material because it is almost composed of FeO and TiO _2, so that incorporation of FeO into the glass becomes easy, and Making the operating conditions of the actual kiln almost unchanged so that the oxidation-reduction state of the glass is not changed as much as possible, that is, the reduction rate of the actual kiln is about 0.45, whereas the infrared-ultraviolet absorbing glass of the present invention is manufactured. This is because it helps even a little to add various effects such as CeO ₂ to about 0.3 to 0.4,
It is preferable to use at least one of carbon, or metal powder or oxide such as Zn or Sn as a trace amount raw material, for example, sometimes the action effect of a fining agent such as Glauber's salt (Na ₂ SO ₄ ) is assisted. On the other hand, on the other hand, it is likely to adversely affect the securing of the desired color tone, and a reducing agent such as Zn or Sn may also be necessary to adjust the balance between Fe ₂ O ₃ and FeO. Is.

The infrared and ultraviolet absorbing glass of the present invention is an easily tempered glass composition, which is a thin glass sheet having a thickness of about 1 mm to a thick glass sheet having a thickness of about 10 mm, which is a flat plate or a bent plate whose strength has been increased from its generation, and which has been semi-strengthened. It is useful to use as a reinforced glass or the like as a single plate glass, a laminated glass, a laminated glass or a double glazing, and especially for a window glass for a vehicle.

[Action]

As described above, the infrared-ultraviolet-absorbing glass of the present invention and the method for producing the same are glass in which a specific oxide component is combined in a specific composition range, or a specific raw material is easily strengthened and the reduction of the reduction rate is suppressed. Used in combination to produce the glass described above,
For example, considering the meltability, clarification, weather resistance, moldability, devitrification, cost, etc., the manufacturing conditions of conventional float glass and the properties of the glass are hardly changed, and in addition, it has an easy strengthening property. It absorbs infrared rays and ultraviolet rays and has a high habitability for human beings, and it has excellent transparency for distinguishing objects to ensure high safety. It becomes a good harmony with and becomes environmentally superior, and further, even with thin sheet glass etc. which could not be obtained by the conventional heat strengthening method, it becomes possible to obtain a sufficient strengthening degree or a sufficient strength increase,
It is possible to provide an infrared and ultraviolet absorbing glass which is useful not only for architectural window glass but also for furniture glass, cooking glass, and especially window glass for vehicles such as automobiles.

[Examples] Examples of the present invention will be described below.

Example 1 Normally, glass is selected silica sand (manufactured by Kyoritsu Kiln Co., Ltd.) and first-grade reagents Al ₂ O ₃ , Fe ₂ O ₃ , CaCO ₃ , MgCO ₃ , Na ₂ SO ₃ , and KN.
O ₃ , CeO ₂ , TiO ₂ , ilmenite, etc. are used, and the viscosity temperature is 10
650-685 ℃ at ⁹ poise, 555-585 ℃ at 10 ¹² poise, and weigh and mix the glass composition so that the temperature difference between them becomes 96-103 ℃. In order to obtain the reduction rate (about 0.35) of carbon, 0.175% by weight of carbon was added and compounded. The compounded raw material was put into a crucible and melted for about 3 hours in an electric furnace maintained at about 1450 ° C for about 3 hours. For further homogenization and clarification, hold at 1420 to 1430 ° C for about 2 hours, then cast into a mold to make a glass block and measure 100mm x 100mm in thickness.
Each sample was cut into a 5 mm glass plate, ground and polished.

For this sample, the glass component composition (% by weight) was measured by a wet analysis method based on JIS R-3101, and the viscosity temperature (° C) was measured by a bending arm method to obtain a viscosity curve of 10 ⁹ and 10 ¹² poises. In addition to obtaining the temperature, the strain point by the Lily method and the softening point by the Lyttelton method were measured, and the visible light transmittance (% at A light source), the ultraviolet transmittance (%) as the optical characteristics (at 5 mm thickness), For solar radiation transmittance, dominant wavelength (nm), and stimulus purity, 340 type self-recording spectrophotometer (manufactured by Hitachi, Ltd.) and JIS Z
Measured and calculated according to −8722, JIS R-3106 and ISO / DIS-9050.

As a result, the glass composition was SiO ₂ 69.6% by weight, Al
₂ O ₃ 1.9%, CaO 9.1%, MgO 3.5%, Na ₂ 013.4%, K ₂ O1.0
%, Fe ₂ O ₃ 0.695%, TiO ₂ 0.26%, CeO ₂ 0.27%, SO ₃ 0.18
%, The sum of the components is 99.905%, and SiO ₂ + Al
₂ O ₃ + TiO ₂ 71.76%, CaO + MgO 12.6%, Na ₂ O + K ₂ 014.4%
The reduction ratio (Fe ²⁺ / Fe ³⁺ ) was about 0.30 to 0.35.

As for the optical characteristics, the visible light transmittance was 71.3%, the solar radiation transmittance was 43%, the main wavelength was 512.2 nm, and the stimulus purity was 2.8, which was the desired green color tone.

Furthermore, regarding the easy strengthening property, it was confirmed that the above-mentioned glass had the above-mentioned viscous temperature clearing the desired specific range and that the temperature difference between the softening point and the strain point was in the range of approximately 200 to 240 ° C. In addition, the ambient temperature of the sample was about 730 ℃.
After about 5 minutes of heating in the furnace, the air pressure is about 1300Ap for normal air-cooling to obtain a tempered glass plate with a size of 120mm x 100mm and a plate thickness of about 3.5mm. The glass plate crushed by impacting at a position of about 30 mm from the corner end face, and the glass plate crushed on the entire surface was examined according to JIS R-3221, and it was a highly reinforced material that sufficiently satisfied the determined standard. .

It should be noted that the bending infrared-ultraviolet absorbing glass of the present invention having a thickness of about 2.5 mm is used on the outside, and the heat ray reflective film-covered bending glass plate having a thickness of about 2 mm is arranged on the inside, and the PVB interlayer film with the film side facing inside When a laminated glass laminated through the above was used as a prototype and used for a window glass of an automobile, the function and effect of the present invention were enhanced and the multifunctionalization was achieved, and the habitability inside and outside the vehicle and the safety were further improved. It was a thing.

Example 2 The same glass raw material as in Example 1 was used, weighed and blended,
A melting operation was performed, and the obtained glass was similarly sampled.

The obtained sample was analyzed, measured and evaluated in the same manner as in Example 1, and as a result, the glass component composition was represented by SiO ₂ 7 by weight.
0.6%, Al ₂ O ₃ 1.6%, CaO 09.5%, MgO 2.5%, Na ₂ O 13.5
%, K ₂ O 0.9%, Fe ₂ O ₃ 0.687%, TiO ₂ 0.26%, CeO ₂ 0.31
%, SO ₃ 0.13%, the total of the components is 99.987%, SiO ₂ + Al ₂ O ₃ + TiO ₂ 72.46%, CaO + MgO 12.0%, Na ₂ O
+ K ₂ O is 14.4%, and the reduction rate is 0.30 to 0.35 as above.
It became a degree. The optical characteristics were visible light transmittance of 70.6%, solar radiation transmittance of 42%, dominant wavelength of 509.2 nm, and stimulus purity of 3.0, and the desired green color tone.

Further, as to the easy strengthening property, when it was carried out in the same manner as in the above-mentioned Example 1, it satisfied the standard determined by JIS similarly to the above-mentioned Example 1, and even a thin glass plate had high efficiency and high yield. It was possible to obtain a product that passed the standard.

Example 3 The same glass raw material as in Example 1 was used, weighed and blended,
A melting operation was performed, and the obtained glass was similarly sampled.

The obtained sample was analyzed, measured, and evaluated in the same manner as in Example 1 above. As a result, the glass component composition was represented by SiO ₂ 6 by weight.
9.2%, Al ₂ O ₃ 1.8%, CaO 09.8%, MgO 3.3%, Na ₂ O 13.4
%, K ₂ O 1.0%, Fe ₂ O ₃ 0.685%, TiO ₂ 0.29%, CeO ₂ 0.30
%, SO ₃ 0.15%, the total of the components is 99.925%, SiO ₂ + Al ₂ O ₃ + TiO ₂ 71.29%, CaO + MgO 13.1%, Na ₂ O
+ K ₂ O is 14.4%, and the reduction rate is 0.30 to 0.35 as above.
It became a degree. The optical characteristics were visible light transmittance of 71.0%, solar radiation transmittance of 42.7%, dominant wavelength of 514.9 nm, stimulus purity of 2.8, and the desired green color tone.

Further, as to the easy strengthening property, when it was carried out in the same manner as in the above-mentioned Example 1, it satisfied the standard determined by JIS similarly to the above-mentioned Example 1, and even a thin glass plate had high efficiency and high yield. It was possible to obtain a product that passed the standard.

Comparative Example 1 The same glass raw materials as in Example 1 were used, except that the ilmenite was not used, weighed and blended, melted, and the obtained glass was similarly sampled.

The obtained sample was analyzed, measured and evaluated in the same manner as in Example 1, and as a result, the glass component composition was represented by SiO ₂ 7 by weight.
2.1%, Al ₂ O ₃ 1.5%, CaO 7.75%, MgO 3.56%, Na ₂ O 12.5
%, K ₂ O 1.1%, Fe ₂ O ₃ 0.753%, TiO ₂ 0.25%, CeO ₂ 0.30
%, SO ₃ 0.18%, the total of the components is 99.993%, SiO ₂ + Al ₂ O ₃ + TiO ₂ 73.85%, CaO + MgO 11.31%, Na ₂
O + K a ₂ O13.6%, the reduction ratio as in the 0.30 to 0.35
It became a degree. As for optical characteristics, visible light transmittance was 68.4%, solar radiation transmittance was 39.3%, main wavelength was 510.5 nm, and stimulus purity was 3.3, which was not necessarily the desired green color tone.

Further, regarding the easy strengthening property, when the same operation as in the above-mentioned Example 1 was carried out, there was a difference from each of the above-mentioned Examples.
It did not necessarily meet the standards set by JIS. Moreover, the efficiency and the yield have not necessarily been improved by the strengthening treatment and the like.

Comparative Example 2 The glass obtained in the same manner as in Comparative Example 1 was similarly sampled.

The obtained sample was analyzed, measured, and evaluated in the same manner as in Example 1 above. As a result, the glass component composition was represented by SiO ₂ 6 by weight.
7.0%, Al ₂ O ₃ 1.7%, CaO 9.45%, MgO 3.0%, Na ₂ O 16.1
%, K ₂ O 1.0%, Fe ₂ O ₃ 0.572%, TiO ₂ 0.73%, CeO ₂ 0.22
%, SO ₃ 0.22%, the total of the components is 99.992%, SiO ₂ + Al ₂ O ₃ + TiO ₂ 69.43%, CaO + MgO 12.45%, Na ₂
O + K ₂ O was 17.1%, and the reduction rate increased slightly to around 0.4. The optical characteristics are visible light transmittance 70.9%, solar radiation transmittance
It was 42.8%, the dominant wavelength was 538.6 nm, and the stimulus purity was 4.2, which was not necessarily the desired green color tone.

Further, regarding the easy strengthening property, when the same operation as in the above-mentioned Example 1 was carried out, there was a difference from each of the above-mentioned Examples.
It did not necessarily meet the standards set by JIS. Moreover, the efficiency and the yield have not necessarily been improved by the strengthening treatment and the like.

The above-described embodiments are merely examples of the present invention, and the present invention is not limited to these embodiments.

〔The invention's effect〕

According to the present invention, an infrared and ultraviolet ray absorbing glass in which a specific oxide component is combined in a specific composition range, and by using a unique raw material in combination, the reduction of the reduction rate is suppressed, and the absorption of infrared rays and the absorption of ultraviolet rays. It is possible to manufacture glass with a well-balanced, sufficiently transparent, easy-to-strengthen property and the desired green color tone without drastically changing the operating conditions of the actual kiln. Infrared rays, which have high habitability, high safety, high environmental performance on both sides and can be made lighter, are useful not only for building window glass but also for automobile window glass. An ultraviolet absorbing glass and its manufacturing method are provided.

Claims (3)

[Claims] 1. The following oxides are substantially represented by weight%: SiO ₂ 68-72%, Al ₂ O ₃ 1.6-3.0%, CaO 8.5-11.0%, MgO
_{2.0~4.2%, Na 2 O12.0~16.0%,} K 2 O0.5~3.0%, SO 3 0.
10 to 0.30%, Fe ₂ O ₃ 0.65 to 0.75%, CeO ₂ 0.20 to 0.35%, T
iO ₂ 0.2 to 0.4%, the sum of these components is 98% or more, and SiO ₂ + Al ₂ O ₃ + TiO ₂ 70.0 to 74.0%, CaO + MgO 12.
0 to 15.0%, infrared ultraviolet absorbing glass, which is a _{Na 2 O + K 2 O13.5~17.0%} . 2. The glass has a visible light transmittance of 70% or more and a solar radiation transmittance of 41 to 45% by a light source A, converted to a thickness of 5 mm.
The infrared ray absorbing glass according to claim 1, wherein the ultraviolet ray transmittance is 7 to 11%, the main wavelength is 509 to 515 nm, and the stimulus purity is 3.5 or less. 3. In producing the infrared and ultraviolet absorbing glass according to claim 1 or 2, ilmenite as a raw material, and / or carbon as a trace amount raw material, or Zn,
A method for producing infrared and ultraviolet absorbing glass, which comprises using at least one of metal powder or oxide such as Sn.