CN106404206A - Ceramic armored high-temperature thermocouple and manufacturing method thereof - Google Patents
Ceramic armored high-temperature thermocouple and manufacturing method thereof Download PDFInfo
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- CN106404206A CN106404206A CN201610971659.0A CN201610971659A CN106404206A CN 106404206 A CN106404206 A CN 106404206A CN 201610971659 A CN201610971659 A CN 201610971659A CN 106404206 A CN106404206 A CN 106404206A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a ceramic armored high-temperature thermocouple and a manufacturing method thereof. The thermocouple consists of a junction box, a cover case, terminals, a protective casing pipe, a sealing tape, an insulation layer, a lead, a thermocouple wire, and insulators. Specifically, the protective casing pipe is prepared from alumina based high-temperature ceramic, a carbon fiber basket is integrated in the ceramic, and one carbon fiber basket side facing the inside of the protective casing pipe is beyond the insulation layer on the inner surface of the protective casing pipe. The protective casing pipe is also provided with a glue sealing body, which is made of high temperature glue HN-767A. A carbon fiber basket central bundle wire is connected to the lead and fixed in the glue sealing body. The sealing tape is made of high temperature glue HN-767A. The protective casing pipe, the high temperature glue and the junction box form an airtight space, which is a 1Pa-10Pa vacuum environment. The thermocouple wire is nickel chromium silicon-nickel silicon thermocouple wire. The thermocouple provided by the invention that can replace expensive platinum rhodium thermocouple has the advantages of good economical efficiency, high reliability and long service life.
Description
Technical field
The present invention relates to temperature sensor field, more particularly, to a kind of ceramic armor pyrometer couple and its manufacture method.
Background technology
For the Thermal-resistance tool Heat-Treatment of Steel such as heat resisting steel and high-speed steel (treatment temperature typically 1100 DEG C -1350 DEG C it
Between) when, it is only capable of even as heat treatment thermometric using platinum rhodium thermocouple (B is even, S occasionally R is even), according to American army mark AMS at present
The requirement of 2750E, need altogether during high-temperature heat treatment three thermocouples as normalization even it is well known that platinum rhodium thermocouple price
Expensive (armouring platinum rhodium idol wholesale price list props up minimum 1500 yuan, and also only the S of rhodium-containing 10% is even), is therefore further increased
Financial cost.More it is to be noted that in fact domestic platinum rhodium thermocouple routine is typically only capable of reaching 1200 DEG C using temperature, long
Shi Chaowen will be substantially reduced using its service life and serviceability；And be typically used as the even nickel chromium triangle silicon-nisiloy of N although cheap,
Durable, reliability is high, theoretical high using temperature, but its at high temperature the characteristic of oxidizable inefficacy be allowed to cannot be in conventional high temperature heat
Use in process, be typically only used for less than 1100 DEG C thermometrics.
At home in the Patents of application, also nickel chromium triangle silicon-nisiloy thermo wires is not used for pyrometric patent money
Material, in close patent document, patent《A kind of pyrometer couple》(application number：201610136518.7, publication date：2016-07-
20), disclose a kind of structure of the pyrometer couple being all ceramic protective sleeve pipe, but wherein have 2 points of problems：1. still adopt platinum
Rhodium thermocouple, economy is bad；2. its protection outer tube adopt silicon carbide ceramics although silicon carbide ceramics thermal conductivity very well, only its
The characteristic that fragility is high, the difficult porosity of shaping is big makes its fragile, poor reliability when as protection sleeve pipe, tends to have small simultaneously
Grain invades, damages its internal platinum rhodium precious metal structure, and service life is short.
Content of the invention
For solving drawbacks described above present in prior art, the present invention is intended to provide a kind of alternative costliness platinum rhodium thermocouple
Good economy performance, reliability is high, the ceramic armor pyrometer couple of long service life and its manufacture method.
To achieve these goals, the present invention employs the following technical solutions：A kind of ceramic armor pyrometer couple, by wiring
Box, the case being fixed on terminal box edge, the binding post being fixed in terminal box, protection sleeve pipe, it is arranged on protection sleeve pipe and connecing
Band between line box, the insulating barrier being fixed on protection internal surface of casing, lead, the heat being connected with lead and binding post respectively
Galvanic couple thermo wires, insulator that is interspersed and being fixed on thermocouple thermo wires form, wherein：Described protection sleeve pipe adopts alumina base high
Warm pottery is made, and its pottery is integrated with carbon fiber basket in vivo, and carbon fiber basket exceeds protection to the one side of protection inside pipe casing
The insulating barrier of internal surface of casing is simultaneously connected by centralized bunch boundling；It is additionally provided with glue envelope body at protection sleeve pipe inner termination, should
Glue envelope body adopts high-temp glue HN-767A to make；It is internal that the centralized bunch of carbon fiber basket and lead are connected and fixed to glue envelope；
Described band is also adopted by high-temp glue HN-767A and manufactures, and the gap between terminal box and protection sleeve pipe is filled out by this high-temp glue completely
Fill；The confined space that protection sleeve pipe, high-temp glue and terminal box are constituted is the vacuum environment of 1Pa～10Pa；Thermocouple thermo wires is normal
The nicrosil nisil thermocouple thermo wires that rule N occasionally adopts；Lead is also nickel chromium triangle silicon-nisiloy material.
The manufacture method of above-mentioned ceramic armor pyrometer couple, comprises the following steps：
1) preparation of raw material, equipment and frock
1. raw material：Prepare enough containing mass fraction for 8%-10% aluminate adhesive alumina-based ceramic powder,
Insulator the nickel chromium triangle connecting both positive and negative polarity thermo wires by intermediate connection point are interted and be fixed with to enough carbon fibers, routinely technology
Silicon-Nickel-Silicom thermocouple thermo wires, nickel chromium triangle silicon-nisiloy lead, the terminal box being mounted with case and binding post, high-temp glue HN-767A；
2. equipment and frock：Prepare vacuum ceramic sintering furnace；Ceramic post sintering mould；Vacuum packaging equipment；Baking oven；
2) the thermometric end shaping structures that protection sleeve pipe, carbon fiber basket, lead and glue seal body are included
1. ready alumina-based ceramic powder is loaded in ceramic post sintering mould, until by ceramic post sintering mold bottom
Filling is full；
2. carbon fiber is woven into basket, and the embedment of basket bottom is loaded with the ceramic post sintering of alumina-based ceramic powder
In mold bottom, length of embedment is the 2/3-3/4 of alumina-based ceramic powder thickness, then employing will by alumina-based ceramic powder
The filling of ceramic post sintering mould is full and is compacted, and retains centralized bunch outside ceramic powders；
3. it is sintered in vacuum ceramic sintering furnace, 1800 DEG C -1850 DEG C of sintering temperature, heating rate room temperature -1000
DEG C stage heating rate is 10 DEG C/min-30 DEG C/min, 1000 DEG C -1300 DEG C stage heating rates are 8 DEG C/min-15 DEG C/
Min, 1300 DEG C to thermophase heating rate be 3 DEG C/min-5 DEG C/min, temperature retention time 4-6h to after temperature, insulation terminate after with
The speed of not higher than 25 DEG C/min is come out of the stove after being cooled to not higher than 200 DEG C, obtains stand-by porcelain bushing integrated morphology after the demoulding；
4. lead is connected with the centralized bunch of carbon fiber basket, then using vacuum ceramic sintering furnace by high-temp glue HN-
767A is heated to fluid state, is then evacuated in vacuum and is not less than 1 × 10-3By the height of fluid state in Pa vacuum seal shove charge
Warm glue HN-767A drops to the bottom of stand-by porcelain bushing integrated morphology until flooding carbon fiber basket, and reserved lead is outside, cold
But obtain the thermometric end structure of the required shaping in place to room temperature；
3) encapsulate
1. it is packaged in vacuum packaging equipment, keeps vacuum 1Pa～10Pa, brush absolutely in protection sleeve pipe first
Edge layer；Then successively lead is connected (by normal with both positive and negative polarity thermocouple thermo wires intermediate connection point that is interspersed and being fixed with insulator
Rule technology, just extremely nickel chromium triangle silicon, negative pole be nisiloy), by both positive and negative polarity thermocouple thermo wires respectively with two being fixed in terminal box
Binding post connects；Again protection sleeve pipe is fixed together using high-temp glue HN-767A with terminal box and seals, that is, after obtaining encapsulation
Thermocouple；
4) stabilization processes
1. by step 3) thermocouple after the encapsulation that obtains is placed in baking oven, is heated to 200 DEG C -250 DEG C, insulation
30min-50min, that is, finally required acquisition ceramic armor pyrometer couple.
Compared with prior art, the present invention has advantages below：Using nicrosil nisil thermocouple thermo wires, significantly drop
Low manufacturing cost；Sleeve pipe is protected using alumina-based ceramic manufacture, compactness is good, shock resistance, high temperature resistant, is integrated with it
Carbon fiber basket, carbon fiber, as the best material of existing known thermal conductivity, can fundamentally overcome alumina-based ceramic to lead
Hot poor defect, makes the temperature sensitivity of the present invention greatly improve；Using nicrosil nisil thermocouple thermo wires completely true
Work under Altitude, due to vacuum ranges 1Pa-10Pa, this vacuum both can ensure that thermo wires did not aoxidized at high temperature, and not
Composition can be led to volatilize at high temperature because vacuum is too high, its invalid temperature (i.e. maximum operation (service) temperature) can be promoted to 1380
DEG C, and do not have other factorses and lead to its inefficacy, reliability is high, overcomes nicrosil nisil thermocouple thermo wires and cannot be used for
The technology prejudice that 1300 DEG C of high temperature above measure when long；Body is sealed as glue using high-temp glue HN-767A, by carbon fiber and lead and
Annexation between thermocouple thermo wires is fixed, it is to avoid thermocouple thermo wires, lead are contacted with carbon fiber basket zones of different and lead
Cause the situation of short circuit, also ensure that the homogeneity of temperature conduction, make the present invention rapider, accurate to the reaction of temperature, usability
Can be more preferably；Sealed using high-temp glue HN-767A, on the one hand after this high temperature gum forming, Volume Changes are minimum, air-tightness is good, knot
Make a concerted effort strong, on the other hand this high-temp glue uses temperature up to 1700 DEG C, will not because under high temperature using and aging or oxidation deactivation；By
In heat-resisting, durable, anti-seismic structure and the material of present invention employing, the service life of the present invention is made to greatly improve.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the top view of carbon fiber basket；
In figure：Case 1, binding post 2, terminal box 3, band 4, insulating barrier 5, insulator 6, thermocouple thermo wires 7, lead 8,
Glue envelope body 9, carbon fiber basket 10, protection sleeve pipe 11.
Specific embodiment
Embodiment 1：
A kind of ceramic armor pyrometer couple, the case 1 by terminal box 3, being fixed on terminal box 3 edge, is fixed on wiring
Binding post 2 on box 3, protection sleeve pipe 11, the band 4 being arranged between protection sleeve pipe 11 and terminal box 3, it is fixed on protective case
The insulating barrier 5 of pipe 11 inner surface, lead 8, the thermocouple thermo wires 7 being connected with lead 8 and binding post 2 respectively, interspersed and be fixed on
Insulator 6 on thermocouple thermo wires 7 forms, wherein：Described protection sleeve pipe 11 is made using alumina base refractory ceramics, its pottery
It is integrated with carbon fiber basket 10 in vivo, one side within to protection sleeve pipe 11 for the carbon fiber basket 10 exceeds protection sleeve pipe 11 inner surface
Insulating barrier 5 and by centralized bunch boundling connect；It is additionally provided with glue envelope this glue of body 9 envelope body 9 at protection sleeve pipe 11 inner termination
Made using high-temp glue HN-767A；The centralized bunch of carbon fiber basket 10 and lead 8 are connected and fixed in glue envelope body 9；Institute
State band 4 and be also adopted by the manufacture of high-temp glue HN-767A, this high-temp glue will be complete for the gap between terminal box 3 and protection sleeve pipe 11
Filling；The confined space that protection sleeve pipe 11, high-temp glue and terminal box 3 are constituted is the vacuum environment of 1Pa～10Pa；Thermocouple thermo wires
7 is the nicrosil nisil thermocouple thermo wires 7 that conventional N occasionally adopts；Lead 8 is also nickel chromium triangle silicon-nisiloy material.
The manufacture method of above-mentioned ceramic armor pyrometer couple, comprises the following steps：
1) preparation of raw material, equipment and frock
1. raw material：Prepare enough containing mass fraction be 8% aluminate adhesive alumina-based ceramic powder, enough carbon
Insulator 6 the nickel chromium triangle silicon-nickel connecting both positive and negative polarity thermo wires by intermediate connection point are interted and be fixed with to fiber, routinely technology
Silicon thermocouple thermo wires 7, nickel chromium triangle silicon-nisiloy lead 8, the terminal box 3 being mounted with case 1 and binding post 2, high-temp glue HN-767A；
2. equipment and frock：Prepare vacuum ceramic sintering furnace；Ceramic post sintering mould；Vacuum packaging equipment；Baking oven；
2) the thermometric end shaping structures that protection sleeve pipe 11, carbon fiber basket 10, lead 8 and glue seal body 9 are included
1. ready alumina-based ceramic powder is loaded in ceramic post sintering mould, until by ceramic post sintering mold bottom
Filling is full；
2. carbon fiber is woven into basket, and the embedment of basket bottom is loaded with the ceramic post sintering of alumina-based ceramic powder
In mold bottom, length of embedment is the 2/3-3/4 of alumina-based ceramic powder thickness, then employing will by alumina-based ceramic powder
The filling of ceramic post sintering mould is full and is compacted, and retains centralized bunch outside ceramic powders；
3. it is sintered in vacuum ceramic sintering furnace, 1800 DEG C of sintering temperature, -1000 DEG C of stage liters of heating rate room temperature
Warm speed is 10 DEG C/min, and 1000 DEG C -1300 DEG C stage heating rates are 8 DEG C/min, and 1300 DEG C to thermophase heating rate
For 3 DEG C/min, temperature retention time 4h to after temperature, insulation is cooled to after 200 DEG C with the speed of 25 DEG C/min after terminating comes out of the stove, after the demoulding i.e.
Obtain stand-by porcelain bushing integrated morphology；
4. lead 8 is connected with the centralized bunch of carbon fiber basket 10, then using vacuum ceramic sintering furnace by high-temp glue
HN-767A is heated to fluid state, has then been evacuated to 1 × 10 in vacuum-4By the high temperature of fluid state in Pa vacuum seal shove charge
Glue HN-767A drops to the bottom of stand-by porcelain bushing integrated morphology until flood carbon fiber basket 10, reserved lead 8 outside,
The thermometric end structure of the required shaping in place is obtained after being cooled to room temperature；
3) encapsulate
1. it is packaged in vacuum packaging equipment, keeps vacuum 1Pa, brush insulating barrier in protection sleeve pipe 11 first
5；Then successively lead 8 is connected (routinely technology, just extremely nickel chromium triangle silicon, negative with both positive and negative polarity thermocouple thermo wires 7 intermediate connection point
Extremely nisiloy), both positive and negative polarity thermocouple thermo wires 7 is connected with two binding posts 2 being fixed in terminal box 3 respectively；To protect again
Sleeve pipe 11 is fixed together using high-temp glue HN-767A and seals with terminal box 3, that is, obtain the thermocouple after encapsulation；
4) stabilization processes
1. by step 3) thermocouple after the encapsulation that obtains is placed in baking oven, is heated to 200 DEG C, is incubated 30min, that is,
Required acquisition ceramic armor pyrometer couple eventually.
Embodiment 2：
Structure is all same as Example 1 with most of method and step, as follows at difference：
1) preparation of raw material, equipment and frock
1. raw material：Prepare enough alumina-based ceramic powder, enough being 10% aluminate adhesive containing mass fraction
Carbon fiber, routinely technology intert and be fixed with insulator 6 and both positive and negative polarity thermo wires is connected by intermediate connection point nickel chromium triangle silicon-
Nickel-Silicom thermocouple thermo wires 7, nickel chromium triangle silicon-nisiloy lead 8, the terminal box 3 being mounted with case 1 and binding post 2, high-temp glue HN-767A；
2. equipment and frock：Prepare vacuum ceramic sintering furnace；Ceramic post sintering mould；Vacuum packaging equipment；Baking oven；
2) the thermometric end shaping structures that protection sleeve pipe 11, carbon fiber basket 10, lead 8 and glue seal body 9 are included
1. ready alumina-based ceramic powder is loaded in ceramic post sintering mould, until by ceramic post sintering mold bottom
Filling is full；
2. carbon fiber is woven into basket, and the embedment of basket bottom is loaded with the ceramic post sintering of alumina-based ceramic powder
In mold bottom, length of embedment is the 3/4 of alumina-based ceramic powder thickness, then using by alumina-based ceramic powder by pottery
Sintering mold filling is full and is compacted, and retains centralized bunch outside ceramic powders；
3. it is sintered in vacuum ceramic sintering furnace, 1850 DEG C of sintering temperature, -1000 DEG C of stage liters of heating rate room temperature
Warm speed is 30 DEG C/min, and 1000 DEG C -1300 DEG C stage heating rates are 15 DEG C/min, and 1300 DEG C to thermophase heating rate
For 5 DEG C/min, temperature retention time 6h to after temperature, insulation is cooled to after 180 DEG C with the speed of 20 DEG C/min after terminating comes out of the stove, after the demoulding i.e.
Obtain stand-by porcelain bushing integrated morphology；
4. lead 8 is connected with the centralized bunch of carbon fiber basket 10, then using vacuum ceramic sintering furnace by high-temp glue
HN-767A is heated to fluid state, has then been evacuated to 1 × 10 in vacuum-3By the high temperature of fluid state in Pa vacuum seal shove charge
Glue HN-767A drops to the bottom of stand-by porcelain bushing integrated morphology until flood carbon fiber basket 10, reserved lead 8 outside,
The thermometric end structure of the required shaping in place is obtained after being cooled to room temperature；
3) encapsulate
1. it is packaged in vacuum packaging equipment, keeps vacuum 10Pa, brush insulation in protection sleeve pipe 11 first
Layer 5；Then successively lead 8 is connected with both positive and negative polarity thermocouple thermo wires 7 intermediate connection point (routinely technology, just extremely nickel chromium triangle silicon,
Negative pole be nisiloy), both positive and negative polarity thermocouple thermo wires 7 is connected with two binding posts 2 being fixed in terminal box 3 respectively；To protect again
Protecting pipe 11 is fixed together using high-temp glue HN-767A and seals with terminal box 3, that is, obtain the thermocouple after encapsulation；
4) stabilization processes
1. by step 3) thermocouple after the encapsulation that obtains is placed in baking oven, is heated to 250 DEG C, is incubated 50min, that is,
Required acquisition ceramic armor pyrometer couple eventually.
By the present embodiment 2 produce thermocouple compared to embodiment 1 for, its maximum use high 30 DEG C about of temperature, by force
Du Genggao, temperature sensitivity is higher, but reliability relative reduction.
Described above to the disclosed embodiments, only for making professional and technical personnel in the field be capable of or using this
Invention.Multiple modifications to these embodiments will be apparent from for those skilled in the art, institute herein
The General Principle of definition can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore,
The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The consistent scope the widest of point.
Claims (2)
1. a kind of ceramic armor pyrometer couple, the case (1) by terminal box (3), being fixed on terminal box (3) edge, is fixed on
Binding post (2) in terminal box (3), protection sleeve pipe (11), the band being arranged between protection sleeve pipe (11) and terminal box (3)
(4), it is fixed on the protection insulating barrier (5) of sleeve pipe (11) inner surface, lead (8), be connected with lead (8) and binding post (2) respectively
Thermocouple thermo wires (7), interspersed and be fixed on insulator (6) composition on thermocouple thermo wires (7) it is characterised in that：Described guarantor
Protecting pipe (11) is made using alumina base refractory ceramics, and its pottery is integrated with carbon fiber basket (10), carbon fiber basket in vivo
(10) exceed the insulating barrier (5) of protection sleeve pipe (11) inner surface to the internal one side of protection sleeve pipe (11) and pass through centralized bunch
Boundling connects；It is additionally provided with glue envelope body (9), this glue envelope body (9) adopts high-temp glue HN-767A system at protection sleeve pipe (11) inner termination
Make；The centralized bunch of carbon fiber basket (10) and lead (8) are connected and fixed in glue envelope body (9)；Described band (4)
Manufactured using high-temp glue HN-767A, the gap between terminal box (3) and protection sleeve pipe (11) is filled up completely with by this high-temp glue；Protect
The confined space that protecting pipe (11), high-temp glue and terminal box (3) are constituted is the vacuum environment of 1Pa～10Pa；Thermocouple thermo wires (7)
The nicrosil nisil thermocouple thermo wires (7) occasionally adopting for conventional N；Lead (8) is also nickel chromium triangle silicon-nisiloy material.
2. according to claim 1 the manufacture method of ceramic armor pyrometer couple it is characterised in that comprising the following steps：
1) preparation of raw material, equipment and frock
1. raw material：Prepare enough containing mass fraction for 8%-10% aluminate adhesive alumina-based ceramic powder, enough
Insulator (6) the nickel chromium triangle connecting both positive and negative polarity thermo wires by intermediate connection point are interted and be fixed with to carbon fiber, routinely technology
Silicon-Nickel-Silicom thermocouple thermo wires (7), nickel chromium triangle silicon-nisiloy lead (8), be mounted with case (1) and binding post (2) terminal box (3),
High-temp glue HN-767A；
2. equipment and frock：Prepare vacuum ceramic sintering furnace；Ceramic post sintering mould；Vacuum packaging equipment；Baking oven；
2) the thermometric end shaping structures that protection sleeve pipe (11), carbon fiber basket (10), lead (8) and glue seal body (9) are included
1. ready alumina-based ceramic powder is loaded in ceramic post sintering mould, until ceramic post sintering mold bottom is filled
Full；
2. carbon fiber is woven into basket, and the embedment of basket bottom is loaded with the ceramic post sintering mould of alumina-based ceramic powder
In bottom, length of embedment is the 2/3-3/4 of alumina-based ceramic powder thickness, then using by alumina-based ceramic powder by pottery
Sintering mold filling is full and is compacted, and retains centralized bunch outside ceramic powders；
3. it is sintered in vacuum ceramic sintering furnace, 1800 DEG C -1850 DEG C of sintering temperature, -1000 DEG C of ranks of heating rate room temperature
Section heating rate is 10 DEG C/min-30 DEG C/min, and 1000 DEG C -1300 DEG C stage heating rates are 8 DEG C/min-15 DEG C/min,
1300 DEG C to thermophase heating rate be 3 DEG C/min-5 DEG C/min, temperature retention time 4-6h to after temperature, insulation terminate after with not high
Come out of the stove after the speed of 25 DEG C/min is cooled to not higher than 200 DEG C, after the demoulding, obtain stand-by porcelain bushing integrated morphology；
4. lead (8) is connected with the centralized bunch of carbon fiber basket (10), then using vacuum ceramic sintering furnace by high-temp glue
HN-767A is heated to fluid state, is then evacuated in vacuum and is not less than 1 × 10-3By fluid state in Pa vacuum seal shove charge
High-temp glue HN-767A drop to the bottom of stand-by porcelain bushing integrated morphology until flood carbon fiber basket (10), reservation is drawn
Line (8) outside, obtains the thermometric end structure of the required shaping in place after being cooled to room temperature；
3) encapsulate
1. it is packaged in vacuum packaging equipment, keeps vacuum 1Pa～10Pa, brush absolutely in protection sleeve pipe (11) first
Edge layer (5)；Then successively by lead (8) with both positive and negative polarity thermocouple thermo wires (7) tie point that is interspersed and being fixed with insulator (6) even
Connect, both positive and negative polarity thermocouple thermo wires (7) is connected with two binding posts (2) being fixed in terminal box (3) respectively；Again by protective case
Pipe (11) is fixed together using high-temp glue HN-767A and seals with terminal box (3), that is, obtain the thermocouple after encapsulation；
4) stabilization processes
1. by step 3) thermocouple after the encapsulation that obtains is placed in baking oven, is heated to 200 DEG C -250 DEG C, is incubated 30min-
50min, that is, finally required acquisition ceramic armor pyrometer couple.
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| CN201610971659.0A CN106404206A (en) | 2016-11-07 | 2016-11-07 | Ceramic armored high-temperature thermocouple and manufacturing method thereof |
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