CN105016786B - A kind of PTC thermistor ceramic post sintering saggar coating and its preparation and application - Google Patents
A kind of PTC thermistor ceramic post sintering saggar coating and its preparation and application Download PDFInfo
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- CN105016786B CN105016786B CN201510399293.XA CN201510399293A CN105016786B CN 105016786 B CN105016786 B CN 105016786B CN 201510399293 A CN201510399293 A CN 201510399293A CN 105016786 B CN105016786 B CN 105016786B
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Abstract
The present invention relates to a kind of PTC thermistor ceramic post sintering saggar coating and its preparation and application.Coating formula is calculated as with quality percentage：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.Preparation method includes that base material is prepared and ball milling is into slurry, dries and enter tunnel cave synthesis by slurry, then dispensing ball milling is prepared into coating, then carries out burning infiltration twice and coating is obtained.Coating is mainly used in the inner surface of PTC thermistor ceramic post sintering saggar.The present invention passes through prepares coating on sintering saggar inwall, when PTC thermistor potsherd is loaded, coating has separated the directly contact of PTC thermistor potsherd and corundum-mullite mixing saggar, so as to prevent the chemical reaction of PTC thermistor potsherd and corundum-mullite mixing saggar, and then guarantee the quality of PTC thermistor potsherd.
Description
Technical field
The invention belongs to electron ceramic material manufacturing technology field, more particularly to a kind of PTC thermistor ceramic post sintering
Saggar coating, and preparation method and the application in PTC thermistor ceramic post sintering saggar of the coating.
Background technology
PTC thermistor pottery is more and more widely utilized as heating components and parts, particularly air conditioner industry,
Consumption is up to more than 1,000,000,000 and annual with more than 20% rate of increase sustainable growth now.But air conditioner industry using be
, up to more than 240 DEG C of high-temp PTC heating plate, the heating plate lead tolerance is high, produces contain in high-temperature sintering process in a large number for Curie temperature
Lead fused mass, easily produces chemical reaction with sintering saggar.Industry adopts corundum, mullite mixed sintering saggar mostly at this stage
With 99 porcelain aluminium oxide saggars.Easily there is chemical reaction with leaded fused mass in corundum, mullite mixing saggar, make PTC-ceramic body
Interior ingredients from lossing or variation, form turck's zone at PTC pieces edge, and the properties such as the side reaction coefficient of PTC-ceramic, proof voltage are produced
Life has a strong impact on, and even resulting in ptc material cannot semiconducting.99 porcelain aluminium oxide saggars will not be sent out with the leaded fused mass of PTC-ceramic
Biochemical reaction, but the saggar stress is big, and it is easily to rupture drastically to change in temperature, is susceptible to block up in tunnel cave implosion
Kiln.And a height of corundum of cost, more than 3 times of mullite mixing saggar.The present inventor is it is proposed that a kind of PTC thermistor pottery burns
Knot saggar, by reducing sintering saggar and the contact area of PTC pieces, reaches the mitigation extent of reaction, meets high-temp PTC sintering and requires
Purpose.But cannot thoroughly solving corundum, mullite mixing saggar, generation chemical reaction is contacted with PTC pieces so as to affecting PTC
The problem of critesistor pottery tablet quality.
Content of the invention
The present invention for above-mentioned the deficiencies in the prior art, propose a kind of PTC thermistor ceramic post sintering saggar coating and
The preparation method of the coating, while propose application of the coating in PTC thermistor ceramic post sintering saggar.The preparation of the coating
Success and application, thoroughly solve corundum, mullite mixing saggar and contact with PTC pieces that chemical reaction occurs so as to affecting PTC temperature-sensitives
The problem of resistor ceramic tablet quality.
The present invention solves technical problem and is adopted the technical scheme that：
One side, a kind of PTC thermistor ceramic post sintering saggar coating, its formula are calculated as with quality percentage：Pb3O4
30%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.
Second aspect, a kind of preparation method of PTC thermistor ceramic post sintering saggar coating as described in relation to the first aspect,
Which comprises the following steps successively：
Pb is weighed by formula proportion3O4、BaCO3、TiO2, ZrO and CaCO3Base material is configured to, interpolation with base material total amount is
1:The deionized water of 1 mass ratio, is put into ball milling bucket ball milling 40 hours, and material ball ratio is 1:2, it is prepared into slurry；
Saggar being put into after slurry is dried and entering tunnel cave synthesis, heating rate is 200 DEG C/h, is warming up to 1000
8 hours are incubated after DEG C, rate of temperature fall is 150 DEG C/h, is cooled to room temperature；
After being cooled to room temperature, SiO is added by formula proportion2, and add with base material total amount be 1:0.7 mass ratio go from
Sub- water, is put into ball milling bucket ball milling 22 hours, and material ball ratio is 1:2；Suspend when ball milling was by 20 hours, add 8%（w/w）Concentration is
10%（w/w）PVA solution after ball milling 2 hours again, be prepared into coating；
Coating paintbrush is equably brushed in new sintering saggar inwall, being put into tunnel cave carries out burning infiltration, heated up
Speed is 250 DEG C/h, is incubated 1 hour after being warming up to 1250 DEG C, and rate of temperature fall is 250 DEG C/h, is cooled to room temperature；
Sintering saggar is taken out from tunnel cave after being cooled to room temperature, coating paintbrush is equably brushed in sintering again
Saggar inwall, being put into tunnel cave carries out burning infiltration, and heating rate is 250 DEG C/h, is incubated 1 hour after being warming up to 1250 DEG C, cooling
Speed is 250 DEG C/h, is cooled to room temperature, and coating is obtained.
The formula is calculated as with quality percentage：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3%
And SiO21.7%.
3rd aspect, a kind of PTC thermistor ceramic post sintering saggar as described in terms of one side or second
The application of coating.The formula is calculated as with quality percentage：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO3
2.3% and SiO21.7%.The coating is mainly used in the inner surface of PTC thermistor ceramic post sintering saggar.
4th aspect, a kind of inner surface have the PTC temperature-sensitives electricity of coating as described in terms of one side or second
Resistance ceramic post sintering saggar, which includes PTC thermistor ceramic post sintering saggar body and is arranged on PTC thermistor ceramic post sintering
The coating of saggar body internal surface, the formula of the coating are calculated as with quality percentage：Pb3O430%、BaCO324%、TiO228%、
ZrO 14%、CaCO32.3% and SiO21.7%.
Or, also there is between PTC thermistor ceramic post sintering saggar body internal surface and coating transition zone, the mistake
Cross layer to be formed from coating component to sintering saggar body internal surface burning infiltration.
PTC thermistor ceramic post sintering saggar prepared by the present invention, coating are arranged on inwall, including saggar side wall
Inwall and the upside of saggar bottom, i.e. coating are arranged on the inner surface of sintering saggar.The formula of the coating is：Pb3O430%、
BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.The coating is to arrange to burn by burning infiltration technique
On the inwall of knot saggar.The burning infiltration technique that the present invention is adopted carries out burning infiltration twice, and the sintering saggar inner surface just forms leaded
With the oxide layer of zirconium, can prevent PTC pieces, from corundum-mullite mixing saggar, chemical reaction occurring.
The present invention passes through prepares coating on sintering saggar inwall, and when PTC thermistor potsherd is loaded, coating is separated
Directly contact of the PTC thermistor potsherd with corundum-mullite mixing saggar, so that prevent PTC thermistor potsherd
With the chemical reaction of corundum-mullite mixing saggar, and then the quality of PTC thermistor potsherd is guaranteed.
Specific embodiment
Embodiment 1：A kind of preparation method of PTC thermistor ceramic post sintering saggar coating, which comprises the following steps successively：
Pb is weighed by formula proportion3O4、BaCO3、TiO2, ZrO and CaCO3Base material is configured to, interpolation with base material total amount is
1:The deionized water of 1 mass ratio, is put into ball milling bucket ball milling 40 hours, and material ball ratio is 1:2, it is prepared into slurry；
Saggar being put into after slurry is dried and entering tunnel cave synthesis, heating rate is 200 DEG C/h, is warming up to 1000
8 hours are incubated after DEG C, rate of temperature fall is 150 DEG C/h, is cooled to room temperature；
Second batch is carried out after being cooled to room temperature, SiO is added by formula proportion2, and add with base material total amount be 1:0.7
The deionized water of mass ratio, is put into ball milling bucket ball milling 22 hours, and material ball ratio is 1:2；Suspend when ball milling was by 20 hours, add 8%
（w/w）Concentration is 10%（w/w）PVA solution after ball milling 2 hours again, be prepared into coating；
Coating paintbrush is equably brushed in new sintering saggar inwall, being put into tunnel cave carries out burning infiltration, heated up
Speed is 250 DEG C/h, is incubated 1 hour after being warming up to 1250 DEG C, and rate of temperature fall is 250 DEG C/h, is cooled to room temperature；
Sintering saggar is taken out from tunnel cave after being cooled to room temperature, then coating paintbrush is equably brushed in sintering casket
Alms bowl inwall, being put into tunnel cave carries out burning infiltration, and heating rate is 250 DEG C/h, is incubated 1 hour after being warming up to 1250 DEG C, cooling speed
Rate is 250 DEG C/h, is cooled to room temperature, and coating is obtained.
Embodiment 2：
A kind of inner surface has cated PTC thermistor ceramic post sintering saggar, and which includes PTC thermistor ceramic post sintering
Saggar body and the coating in PTC thermistor ceramic post sintering saggar body internal surface, the formula of coating is in terms of quality percentage
For：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.
Embodiment 3：
Another kind of inner surface has cated PTC thermistor ceramic post sintering saggar, and which includes that PTC thermistor pottery burns
Knot saggar body and the coating in PTC thermistor ceramic post sintering saggar body internal surface, the formula of coating is with quality percentage
It is calculated as：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.Make pottery in PTC thermistor
Also there is between porcelain sintering saggar body internal surface and coating transition zone, transition zone is from coating component to sintering during burning infiltration
Saggar body internal surface burning infiltration is formed.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (5)
1. a kind of PTC thermistor ceramic post sintering saggar coating, it is characterised in that formula is calculated as with quality percentage：Pb3O430%、
BaCO324%、TiO228%、ZrO 14%、CaCO32.3% and SiO21.7%.
2. a kind of preparation method of PTC thermistor ceramic post sintering saggar coating as claimed in claim 1, it is characterised in that：
Comprise the following steps successively：
Pb is weighed by formula proportion3O4、BaCO3、TiO2, ZrO and CaCO3Base material is configured to, it is 1 to add with base material total amount:1 matter
The deionized water of amount ratio, is put into ball milling bucket ball milling 40 hours, and material ball ratio is 1:2, it is prepared into slurry；
Saggar being put into after slurry is dried and entering tunnel cave synthesis, heating rate is 200 DEG C/h, protects after being warming up to 1000 DEG C
Temperature 8 hours, rate of temperature fall are 150 DEG C/h, are cooled to room temperature；
After being cooled to room temperature, SiO is added by formula proportion2, and add with base material total amount be 1:The deionized water of 0.7 mass ratio,
It is put into ball milling bucket ball milling 22 hours, material ball ratio is 1:2；Suspend when ball milling was by 20 hours, add 8%（w/w）Concentration is 10%（w/
w）PVA solution after ball milling 2 hours again, be prepared into coating；
Coating paintbrush is equably brushed in new sintering saggar inwall, being put into tunnel cave carries out burning infiltration, and heating rate is
250 DEG C/h, after being warming up to 1250 DEG C, 1 hour is incubated, rate of temperature fall is 250 DEG C/h, is cooled to room temperature；
Sintering saggar is taken out from tunnel cave after being cooled to room temperature, then coating paintbrush is equably brushed in sintering saggar
Wall, being put into tunnel cave carries out burning infiltration, and heating rate is 250 DEG C/h, is incubated 1 hour after being warming up to 1250 DEG C, and rate of temperature fall is
250 DEG C/h, room temperature is cooled to, coating is obtained.
3. a kind of application of PTC thermistor ceramic post sintering saggar coating as claimed in claim 1 or 2, it is characterised in that should
For PTC thermistor ceramic post sintering saggar.
4. there is a kind of inner surface the PTC thermistor ceramic post sintering saggar of coating as claimed in claim 1 or 2, its feature to exist
In including PTC thermistor ceramic post sintering saggar body and the painting in PTC thermistor ceramic post sintering saggar body internal surface
Layer, the formula of the coating are calculated as with quality percentage：Pb3O430%、BaCO324%、TiO228%、ZrO 14%、CaCO32.3%
And SiO21.7%.
5. inner surface as claimed in claim 4 has cated PTC thermistor ceramic post sintering saggar, it is characterised in that
Between PTC thermistor ceramic post sintering saggar body internal surface and coating have transition zone, the transition zone from coating component to
Sintering saggar body internal surface burning infiltration is formed.
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| CN201510399293.XA CN105016786B (en) | 2015-07-09 | 2015-07-09 | A kind of PTC thermistor ceramic post sintering saggar coating and its preparation and application |
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| CN106587966B (en) * | 2016-11-29 | 2019-11-01 | 湖南省新化县恒生电子陶瓷有限责任公司 | A kind of cordierite, mullite composite ceramic material |
| CN111620717B (en) * | 2020-06-03 | 2022-12-16 | 陕西华星电子开发有限公司 | Surface treatment method and application of ceramic burning pot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963390A (en) * | 1988-10-05 | 1990-10-16 | The Aerospace Corporation | Metallo-organic solution deposition (MOSD) of transparent, crystalline ferroelectric films |
| CN202282248U (en) * | 2011-11-11 | 2012-06-20 | 麦格磁电科技（珠海）有限公司 | Sagger for preventing sintering deformation of magnetic core |
| CN103311498A (en) * | 2013-05-23 | 2013-09-18 | 李艳晖 | Roasting sagger for circulating type lithium battery anode material and preparation method thereof |
| CN103319185A (en) * | 2013-05-23 | 2013-09-25 | 李艳晖 | Circulating lithium battery positive-electrode material roasting saggar surface working layer |
| CN103408306A (en) * | 2012-11-05 | 2013-11-27 | 海宁永力电子陶瓷有限公司 | Process for producing high temperature and pressure resistant PTC (Positive Temperature Coefficient) thermistor ceramics |
-
2015
- 2015-07-09 CN CN201510399293.XA patent/CN105016786B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963390A (en) * | 1988-10-05 | 1990-10-16 | The Aerospace Corporation | Metallo-organic solution deposition (MOSD) of transparent, crystalline ferroelectric films |
| CN202282248U (en) * | 2011-11-11 | 2012-06-20 | 麦格磁电科技（珠海）有限公司 | Sagger for preventing sintering deformation of magnetic core |
| CN103408306A (en) * | 2012-11-05 | 2013-11-27 | 海宁永力电子陶瓷有限公司 | Process for producing high temperature and pressure resistant PTC (Positive Temperature Coefficient) thermistor ceramics |
| CN103311498A (en) * | 2013-05-23 | 2013-09-18 | 李艳晖 | Roasting sagger for circulating type lithium battery anode material and preparation method thereof |
| CN103319185A (en) * | 2013-05-23 | 2013-09-25 | 李艳晖 | Circulating lithium battery positive-electrode material roasting saggar surface working layer |
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