CN103360054A - Thermal sensitive ceramic material, PTC (positive temperature coefficient) thermistor made from thermal sensitive ceramic material for demagnetizing colour TV and manufacturing method of PTC thermistor - Google Patents
Thermal sensitive ceramic material, PTC (positive temperature coefficient) thermistor made from thermal sensitive ceramic material for demagnetizing colour TV and manufacturing method of PTC thermistor Download PDFInfo
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- CN103360054A CN103360054A CN2012100804935A CN201210080493A CN103360054A CN 103360054 A CN103360054 A CN 103360054A CN 2012100804935 A CN2012100804935 A CN 2012100804935A CN 201210080493 A CN201210080493 A CN 201210080493A CN 103360054 A CN103360054 A CN 103360054A
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Abstract
The invention discloses a thermal sensitive ceramic material. The thermal sensitive ceramic material comprises the following components in percent by mol: 68-71 parts of BaCO3, 15-18 parts of SrCo3, 11-17 parts of PbO, 109.5-112 parts of TiO2, 8.5-9.5 parts of CaCO3, 0.32-0.38 part of Y2O3, 0.13-0.15 part of Sb2O3, 0.06-0.08 part of Mn(NO3)2 and liquid-phase sintering auxiliary. The invention also discloses a PTC (positive temperature coefficient) thermistor made from the thermal sensitive ceramic material and a method for manufacturing the PTC thermistor. The method for manufacturing the PTC thermistor comprises the following steps of mixing the components in the designed ratio, and then carrying out wet process ball milling, pre-sintering, secondary wet process ball milling, pelleting and tabletting, sintering and surface processing, thus the PTC thermistor is obtained. The PTC thermistor has low resistivity, high withstand voltage and high current resistance and has better ageing resistance compared with a like product.
Description
Technical field
The invention belongs to the semiconductor ceramic material field, be specifically related to a kind of thermal sensitive ceramic material, and a kind of low resistance that is made by this thermal sensitive ceramic material is high pressure resistant, the colour TV of anti-heavy current impact demagnetization thermistor and make the method for this thermistor.
Background technology
Along with the development of Color TV Technology, the demagnetization thermistor should improve erasure effect and adapt to this variation, and resistance lowering does the key of high erasure effect just.Its normal temperature resistance value of existing demagnetization product is all more than 9 ohm on the market, and the technology comparative maturity is because the strong competition in market is being faced with the crisis of compressing space and economic; In order to satisfy the growth requirement of Color TV Technology, need the thermistor of a kind of low resistance, high pressure resistant anti-heavy current impact, this thermistor must meet following Parameter Conditions:
1, product resistivity is smaller, and at diameter 14.0mm, thickness 2.5mm, in Tc60 ℃ the situation, the normal temperature resistance will be accomplished 1.5～4.5 Ω;
2, ageing resistance is good, can withstand 270V after making the colour TV assembly, 100000 tests of 10A test in disconnected 5 minutes in logical a minute;
3, high voltage withstanding, concerning the thermistor startup sheet of traditional specification (φ 14.0*2.5mm, Tc60 ℃, the normal temperature resistance is 4.5 Ω ± 20%), the product limit is withstand voltage should be more than 850V.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of thermal sensitive ceramic material and the low resistance that made by this thermal sensitive ceramic material is high pressure resistant, the colour TV of anti-heavy current impact demagnetization thermistor.
The present invention also provides a kind of method of making this PTC.
The technical scheme that the present invention adopts is: a kind of thermal sensitive ceramic material comprises by mole% its composition of meter: 68～71 parts of BaCO
3, 15～18 parts of SrCO
3, 11～17 parts of PbO, 109.5～112 parts of TiO
2, 8.5～9.5 parts of CaCO
3, 0.32～0.38 part of Y
2O
3, 0.13～0.15 part of Sb
2O
3, 0.06～0.08 part of Mn (NO
3)
2And sintering Liquid Additive.
In a preferred embodiment of the present invention, the composition of thermal sensitive ceramic material comprises by mole% meter: 71 parts of BaCO
3, 18 parts of SrCO
3, 11 parts of PbO, 109.5 parts of TiO
2, 8.5 parts of CaCO
3, 0.36 part of Y
2O
3, 0.14 part of Sb
2O
3, 0.07 part of Mn (NO
3)
2And sintering Liquid Additive.
Comprise by mole% the sintering Liquid Additive: 1.8～2.5 parts of SiO
2, 1.3～2.0 parts of Al
2O
3
In a preferred embodiment of the present invention, the sintering Liquid Additive comprises: 2.0 parts of SiO
2With 1.7 parts of Al
2O
3
For solving the problems of the technologies described above, another technical solution used in the present invention is: the demagnetization PTC of a kind of low resistance, high voltage withstanding anti-heavy current impact is provided, is made by thermal sensitive ceramic material.This thermal sensitive ceramic material comprises by mole% its composition of meter: 68～71 parts of BaCO
3, 15～18 parts of SrCO
3, 11～17 parts of PbO, 109.5～112 parts of TiO
2, 8.5～9.5 parts of CaCO
3, 0.32～0.38 part of Y
2O
3, 0.13～0.15 part of Sb
2O
3, 0.06～0.08 part of Mn (NO
3)
2And sintering Liquid Additive.With BaCO
3, SrCO
3, PbO, TiO
2, CaCO
3Deng the principal crystalline phase composition and execute the acceptor doping thing and the sintering Liquid Additive mixes by wet ball grinding, presintering, secondary wet process ball milling, granulation and compressing tablet, sintering, surface working according to the ratio batching of design.
Described wet ball grinding is with said mixture wet ball grinding 20～28 hours, and material: ball: the ratio of water is 0.5～1.5: 1～3: 1～2, and slurry is 100～150 ℃ of dryings; Preferred wet ball grinding 24 hours, material: ball: the ratio of water is 1: 2: 1.5, slurry is lower dry at 100 ℃;
Described presintering is with being under 1100 ℃～1150 ℃ through the mixture behind the above-mentioned wet ball grinding in temperature, is incubated 2.5～3.5 hours;
Preferably 1130 ℃ of lower insulations 3 hours;
Described secondary wet process ball milling is that material: ball: the ratio of water is 0.5～1.5: 1～3 with the mixture of presintering wet ball grinding 20～28 hours again: 1～2, and slurry is 100～150 ℃ of dryings;
Preferred wet ball grinding 24 hours, material: ball: the ratio of water is 1: 2: 1.5, slurry is lower dry at 100 ℃;
Described granulation and compressing tablet are to add the PVA granulation, then are pressed into φ 16.5mm, thickness 2.9mm, and density is 3.3g/cm
3Disk;
Described sintering is to be under 1300 ℃～1320 ℃ in temperature, is incubated 50～70 minutes, and 1.0～2.5 ℃/minute cool to 800 ℃, then naturally cool to normal temperature;
Preferred sintering temperature is 1310 ℃, is incubated 60 minutes, and 1.5 ℃/minute cool to 800 ℃;
Described surface working is chemical nickel plating after sintering is finished, and then prints the surface silver coating slurry, obtains the approximately finished product of 3 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
Thermal sensitive ceramic material of the present invention and the PTC that made by this thermal sensitive ceramic material can the high pressure of anti-950V, are higher than the high pressure of anti-850V of standard-required; And can withstand 220V voltage, 100000 tests of 10A electric current test in disconnected 5 minutes in logical a minute after making the colour TV assembly, PTC of the present invention is than the anti-more high-voltage of existing like product, and ageing resistance is better, and resistance is little.
Embodiment
The below is described in detail preferred embodiment of the present invention, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
Embodiment 1-3 is the thermal sensitive ceramic material composition:
Embodiment 1
According to the molar percentage meter, with the principal crystalline phase composition of following proportioning, execute the acceptor doping thing and the sintering Liquid Additive mixes:
The principal crystalline phase composition comprises 71 parts of BaCO
3, 18 parts of SrCO
3, 11 parts of PbO, 109.5 parts of TiO
2With 8.5 parts of CaCO
3
Execute the acceptor doping thing and comprise 0.36 part of Y
2O
3, 0.14 part of Sb
2O
3, 0.07 part of Mn (NO
3)
2
The sintering Liquid Additive comprises 2.0 parts of SiO
2With 1.7 parts of Al
2O
3
Embodiment 2
According to the molar percentage meter, with the principal crystalline phase composition of following proportioning, execute the acceptor doping thing and the sintering Liquid Additive mixes:
The principal crystalline phase composition comprises 69 parts of BaCO
3, 17 parts of SrCO
3, 14 parts of PbO, 109.5 parts of TiO
2With 8.5 parts of CaCO
3
Execute the acceptor doping thing and comprise 0.32 part of Y
2O
3, 0.15 part of Sb
2O
3, 0.065 part of Mn (NO
3)
2
The sintering Liquid Additive comprises 2.5 parts of SiO
2With 1.9 parts of Al
2O
3
Embodiment 3
According to the molar percentage meter, with the principal crystalline phase composition of following proportioning, execute the acceptor doping thing and the sintering Liquid Additive mixes:
The principal crystalline phase composition comprises 68 parts of BaCO
3, 15 parts of SrCO
3, 14 parts of PbO, 109.5 parts of TiO
2With 9.5 parts of CaCO
3
Execute the acceptor doping thing and comprise 0.35 part of Y
2O
3, 0.13 part of Sb
2O
3, 0.08 part of Mn (NO
3)
2
The sintering Liquid Additive comprises 1.8 parts of SiO
2With 1.3 parts of Al
2O
3
Serve as reasons PTC that this thermal sensitive ceramic material mixture makes and make the method for PTC of embodiment 4-6:
Embodiment 4
Each composition is prepared burden in embodiment 1, embodiment 2 or embodiment 3 arbitrary ratios, mix.
Wet ball grinding: mixed raw material, ball, water are made mixed slurry, wet ball grinding 20 hours with 0.5: 1: 1 mass ratio mixing;
Presintering: with above-mentioned mixed slurry after 100 ℃ of dryings, 1100 ℃ of pre-burnings 3.5 hours;
The secondary wet process ball milling: material, ball, water make mixed slurry, wet ball grinding 20 hours with 0.5: 1: 1 mass ratio mixing;
Granulation: the mixed slurry after above-mentioned the milling 100 ℃ of dryings, is then added binding agent PVA (polyvinyl alcohol) granulation;
Compressing tablet: granulated pellet is pressed into φ 16.5mm, thickness 2.9mm, density is 3.3g/cm
3Disk;
Sintering: disk 1300 ℃ of insulations 70 minutes, is then cooled to 800 ℃ with 2.5 ℃/minute speed, naturally cool to again normal temperature;
Surface working: chemical nickel plating after sintering finished, then print the surface silver coating slurry, obtain the approximately finished product of 3 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
Embodiment 5
Each composition is prepared burden in embodiment 1, embodiment 2 or embodiment 3 arbitrary ratios, mix.
Wet ball grinding: mixed raw material, ball, water are made mixed slurry, wet ball grinding 28 hours with 0.5: 1: 1 mass ratio mixing;
Presintering: with above-mentioned mixed slurry after 150 ℃ of dryings, 1150 ℃ of pre-burnings 2.5 hours;
The secondary wet process ball milling: material, ball, water make mixed slurry, wet ball grinding 28 hours with 0.5: 1: 1 mass ratio mixing;
Granulation: the mixed slurry after above-mentioned the milling 150 ℃ of dryings, is then added binding agent PVA (polyvinyl alcohol) granulation;
Compressing tablet: granulated pellet is pressed into φ 16.5mm, thickness 2.9mm, density is 3.3g/cm
3Disk;
Sintering: disk 1320 ℃ of insulations 50 minutes, is then cooled to 800 ℃ with 1.0 ℃/minute speed, naturally cool to again normal temperature;
Surface working: chemical nickel plating after sintering finished, then print the surface silver coating slurry, obtain the approximately finished product of 3 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
Embodiment 6
Each composition is prepared burden in embodiment 1, embodiment 2 or embodiment 3 arbitrary ratios, mix.
Wet ball grinding: mixed raw material, ball, water are made mixed slurry, wet ball grinding 24 hours with 1: 2: 1.5 mass ratio mixing;
Presintering: with above-mentioned mixed slurry after 100 ℃ of dryings, 1130 ℃ of pre-burnings 3 hours;
The secondary wet process ball milling: material, ball, water make mixed slurry, wet ball grinding 24 hours with 1: 2: 1.5 mass ratio mixing;
Granulation: the mixed slurry after above-mentioned the milling 100 ℃ of dryings, is then added binding agent PVA (polyvinyl alcohol) granulation;
Compressing tablet: granulated pellet is pressed into φ 16.5mm, thickness 2.9mm, density is 3.3g/cm
3Disk;
Sintering: disk 1310 ℃ of insulations 60 minutes, is then cooled to 800 ℃ with 1.8 ℃/minute speed, naturally cool to again normal temperature;
Surface working: chemical nickel plating after sintering finished, then print the surface silver coating slurry, obtain the approximately finished product of 3 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
The colour TV nullification magnetic sheet finished product that the PTC that is used for demagnetization that is made by this thermal sensitive ceramic material makes, actual test show, this product is withstand voltage can to reach 900V, can withstand 270V, 100000 tests of 10A test in disconnected 5 minutes in logical a minute after being assembled into the colour TV device.
Claims (7)
1. a thermal sensitive ceramic material is characterized in that, it comprises following component according to the molar percentage meter: 68～71 parts of BaCO
3, 15～18 parts of SrCO
3, 11～17 parts of PbO, 109.5～112 parts of TiO
2, 8.5～9.5 parts of CaCO
3, 0.32～0.38 part of Y
2O
3, 0.13～0.15 part of Sb
2O
3, 0.06～0.08 part of Mn (NO
3)
2And sintering Liquid Additive.
2. stupalith according to claim 1 is characterized in that, it comprises following component according to the molar percentage meter: 71 parts of BaCO
3, 18 parts of SrCO
3, 11 parts of PbO, 109.5 parts of TiO
2, 8.5 parts of CaCO
3, 0.36 part of Y
2O
3, 0.14 part of Sb
2O
3, 0.07 part of Mn (NO
3)
2And sintering Liquid Additive.
3. according to claim 1 or 2 described stupaliths, it is characterized in that: described sintering Liquid Additive comprises 1.8～2.5 parts of SiO by mole% meter
2With 1.3～2.0 parts of Al
2O
3
4. stupalith according to claim 3, it is characterized in that: described sintering Liquid Additive comprises 2.0 parts of SiO by mole% meter
2With 1.7 parts of Al
2O
3
5. high pressure resistant, the colour TV of anti-heavy current impact demagnetization thermistor of a low resistance, it is characterized in that: described thermistor is made by the arbitrary described thermal sensitive ceramic material of claim 1～4.
6. a method of making the described thermistor of claim 5 is characterized in that, may further comprise the steps:
A) wet ball grinding: mixture is mixed in proportion, wet ball grinding 20～28 hours, material: ball: the ratio of water is 0.5～1.5: 1～3: 1～2, slurry is 100～150 ℃ of dryings;
B) presintering: be under 1100～1150 ℃ with the mixture behind the wet ball grinding in temperature, be incubated 2.5～3.5 hours;
C) secondary wet process ball milling: with the mixture of presintering wet ball grinding 20～28 hours again, material: ball: the ratio of water is 0.5～1.5: 1～3: 1～2, and slurry is 100～150 ℃ of dryings;
D) granulation and compressing tablet: add the PVA granulation, then be pressed into φ 16.5mm, thickness 2.9mm, density is 3.3g/cm
3Disk;
E) sintering: be under 1300～1320 ℃ in temperature, be incubated 50～70 minutes, 1.0～2.5 ℃/minute cool to 800 ℃, then naturally cool to normal temperature;
F) surface working: chemical nickel plating after sintering finished, then print the surface silver coating slurry, obtain the approximately finished product of 1.5～4.5 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
7. according to the method for the described manufacturing thermistor of claim 6, it is characterized in that, may further comprise the steps:
A) wet ball grinding: mixture is mixed in proportion, wet ball grinding 24 hours, material: ball: the ratio of water is 1: 2: 1.5, and slurry is 100 ℃ of dryings;
B) presintering: be under 1130 ℃ with the mixture behind the wet ball grinding in temperature, be incubated 3 hours;
C) secondary wet process ball milling: with the mixture of presintering wet ball grinding 24 hours again, material: ball: the ratio of water is 1: 2: 1.5, and slurry is 130 ℃ of dryings;
D) granulation and compressing tablet: add the PVA granulation, then be pressed into φ 16.5mm, thickness 2.9mm, density is 3.3g/cm
3Disk;
E) sintering: be under 1310 ℃ in temperature, be incubated 60 minutes, 1.5 ℃/minute cool to 800 ℃, then naturally cool to normal temperature;
F) surface working: chemical nickel plating after sintering finished, then print the surface silver coating slurry, obtain the approximately finished product of 3 Ω of diameter 14.0mm, thickness 2.5mm, resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100804935A CN103360054A (en) | 2012-03-26 | 2012-03-26 | Thermal sensitive ceramic material, PTC (positive temperature coefficient) thermistor made from thermal sensitive ceramic material for demagnetizing colour TV and manufacturing method of PTC thermistor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100804935A CN103360054A (en) | 2012-03-26 | 2012-03-26 | Thermal sensitive ceramic material, PTC (positive temperature coefficient) thermistor made from thermal sensitive ceramic material for demagnetizing colour TV and manufacturing method of PTC thermistor |
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| Publication Number | Publication Date |
|---|---|
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252000A (en) * | 2016-08-03 | 2016-12-21 | 代长华 | A kind of Thermistor and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031150A (en) * | 1988-06-13 | 1989-02-15 | 江苏省宜兴陶瓷公司研究所 | A kind of PTC thermister for start of refrigerator compressor and preparation method |
| CN1237949A (en) * | 1996-11-20 | 1999-12-08 | 株式会社村田制作所 | Barium titanate-base semiconducting ceramic composition |
-
2012
- 2012-03-26 CN CN2012100804935A patent/CN103360054A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031150A (en) * | 1988-06-13 | 1989-02-15 | 江苏省宜兴陶瓷公司研究所 | A kind of PTC thermister for start of refrigerator compressor and preparation method |
| CN1237949A (en) * | 1996-11-20 | 1999-12-08 | 株式会社村田制作所 | Barium titanate-base semiconducting ceramic composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252000A (en) * | 2016-08-03 | 2016-12-21 | 代长华 | A kind of Thermistor and preparation method thereof |
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Application publication date: 20131023 |