CN101423388A - Solid phase synthesis of PTC thermistor motor startup ceramic chip formula for one time and production process - Google Patents
Solid phase synthesis of PTC thermistor motor startup ceramic chip formula for one time and production process Download PDFInfo
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- CN101423388A CN101423388A CNA2008100689771A CN200810068977A CN101423388A CN 101423388 A CN101423388 A CN 101423388A CN A2008100689771 A CNA2008100689771 A CN A2008100689771A CN 200810068977 A CN200810068977 A CN 200810068977A CN 101423388 A CN101423388 A CN 101423388A
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- solid phase
- ptc thermistor
- phase synthesis
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Abstract
The invention relates to a motor-on ceramic chip material formulation of a one-step solid phase synthesized PTC thermistor and a process for producing the same. A novel motor-on ceramic chip material formulation of the PTC thermistor is excogitated according to the characteristics of a motor-on thermistor by adopting a multi-donor doping principle, and the prior process for the domestic production of the motor-on chip of the PTC thermistor is improved according to the formula, wherein the formulation and the weight percentage are as follows: 88.28 to 94.85 percent of BaTiO3; 2.608 to 5.65 percent of CaCO3; 1.28 to 5.012 percent of TiO2; 0.68 to 0.84 percent of SiO2; 0.153 to 0.182 percent of [Y2O3, Nb2O3 and Sb2O3]; 0.008 to 0.012 percent of Li2CO3; and 0.165 to 0.192 percent of Mn(NO3)2. The production process is simplified from the prior more than 10 steps to a few steps. The material formulation uses a simple production process, can improve the product quality and the product qualification rate, save energy sources, and is an innovation to the prior formulation.
Description
Technical field: the present invention relates to a kind of ceramic material prescription, specifically solid phase synthesis of PTC thermistor motor startup ceramic chip formula and production technique.
Background technology: at present the PTC thermistor motor starting chip of producing at home nearly all is traditional prescription, in this type of prescription because SrCO
3, CaCO
3There is not pre-burning to decompose, if according to conventional experience pressed density 3.2～3.3g/Cm
3The interior crystal boundary space of porcelain basal body is bigger after the roasting, and pore is many, and shrinkage coefficient is bigger, even the porcelain primary surface has bubble to produce.
The conventional fabrication processes of PTC thermistor motor starting chip is a dewatered drying behind a ball milling, must be 1100～1190 ℃ of pre-burning reactions, then the pre-burning piece is pulverized, carried out secondary ball milling, granulation, dry-pressing, moulding, roasting and make PTC thermistor motor starting ceramic substrate.
The contriver proposes Y in " research of a solid phase synthesis CPTC of many donor dopings thermistor " (Guizhou University of Technology's journal natural science edition the 37th volume the 3rd phase 08.5.) literary composition
2O
3, Nb
2O
5Two donor dopings are used BaTiO
3The design of a solid phase synthesis CPTC of powder thermistor is for the invention provides theoretical basis.
Summary of the invention: purpose of the present invention, be to adopt the principle of a solid phase synthesis CPTC of many donor dopings thermal sensitive ceramics resistance, characteristics according to motor starting PTC thermistor, research and propose a kind of new PTC thermistor motor startup ceramic chip formula, and present domestic production PTC thermistor motor starting chip production technology is improved.
Prescription, proportioning and the complete processing of the new PTC thermistor motor startup ceramic chip that the present invention proposes starts prescription, the proportioning of ceramic chip and adds technology different fully with the PTC thermistor horse of domestic production at present.The prescription and the quality per distribution ratio of domestic production PTC thermistor motor starting chip are at present:
1.BaCO
3 60～67％
2.CaCO
3 5～6％
3.TiO
2 26～32％
4.SiO
2 0.38～0.55％
5.SrCO
3 0.57～0.68％
6.Y
2O
3 0.189～0.265％
7.Mn(NO
3)
2 0.42～0.54％
From prescription as can be known, carbonate content height in the prescription, bakes to burn the article decompose a large amount of gases of generation, and the bakes to burn the article decomposition is also incomplete in addition, roasting pressed density 3.2～3.3g/cm
3, can not meet the requirement of making PTC thermistor motor startup ceramic chip, workpiece preheating block must be pulverized, carry out secondary ball milling granulation, dry-pressing formed and roasting, make PTC thermistor motor startup ceramic chip, be called secondary ball milling or re-baking technology, its technical process is followed successively by:
Batching → ball milling → dehydration → oven dry → granulation → precompressed → moulding → roasting → pulverizing → ball milling → granulation → dry-pressing → moulding → roasting
Nearly ten multisteps are rapid for operation
The present invention takes BaTiO according to many donor doping one defective material solid phase synthesis principles
3Powder control is with Y
2O
3+ Nb
2O
3+ Sb
2O
3Three alms givers are superfluous to mix, and in conjunction with adding Li
2CO
3Or K
2CO
3Acceptor impurity, the PTC thermistor motor startup ceramic chip prescription and the quality per distribution ratio of development are:
1.BaTiO
3 88.28～94.85％
2.CaCO
3 2.608～5.65％
3.TiO
2 1.28～5.012％
4.SiO
2 0.68～0.84％
5.[Y
2O
3+Nb
2O
3+Sb
2O
3] 0.153～0.182％
6.Li
2CO
3Or K
2CO
30.008～0.012%
7.Mn(NO
3)
2 0.165～0.192％
Screening formulation of the present invention and quality per distribution ratio are
1.BaTiO
3 88.28～94.85％
2.CaCO
3 2.608～5.65％
3.TiO
2 1.28～5.012％
4.SiO
2 0.68～0.84％
5.[Y
2O
3+Nb
2O
3+Sb
2O
3] 0.175
6.Li
2CO
3 0.010
7.Mn(NO
3)
2 0.183
The proportioning of each composition is a mass percent in the above-mentioned prescription, and total mass percent is 100%
Y
2O
3, Nb
2O
3And Sb
2O
3Mol ratio 7: 2: 1
The present invention's prescription is used BaTiO
3Replace BaCO
3And strict control BaTiO
3The quality of powder adopts the superfluous doping of three alms givers, and in conjunction with adding Li
2CO
3Or K
2CO
3Acceptor impurity, a ball milling roasting can pressed density reach 3.4～3.6g/cm
3Meet the requirement of PCT thermistor motor startup ceramic chip.
Technical process of the present invention is followed successively by:
Batching → ball milling → oven dry → granulation → dry-pressing → moulding → roasting, production technique of the present invention are called process for solid phase synthesis of a ball milling, compare with secondary ball milling or re-baking technology, and processing step is simplified greatly.
The present invention is to BaTiO
3Powder quality control requires:
Free BaO＜1.5; Specific surface area＜2.0 size-grade distribution D
50≤ 38mm; Barium titanium ratio: Ba/Ti=1; Foreign matter content control: Sr
2+≤ 15ppm, Ca
2+≤ 18ppm, Mg
2+≤ 4ppm, Fe
2+,
3+≤ 3ppm, Na
+≤ 5ppm, k
+≤ 6ppm, Al
3+≤ 5ppm, Si
4+≤ 9ppm.
Concrete operations are: raw material is weighed up in proportion, puts into the rolling ball milling jar, by material: ball: the weight ratio of water=1: 2: 2, ball milling 24h then discharging 120 ± 5 ℃ drying in oven, granulation, with efficient automatic molder moulding; With 14 meters furnace superintendents, 11 groups of warm areas, 18 temperature control continuous tunnel furnaces, 1280～1340 ℃ of high-temperature zone maturing temperatures, high temperature solid-state generated time 1.5～2 hours advances stove to the total time control 15～22 hours of coming out of the stove, and the chip after high temperature burns till is handled through Ohmic electrode and surface electrode.
Prescription of the present invention and technology have following characteristics:
(1) porcelain prescription of the present invention adopts Y
2O
3, Nb
2O
3And Sb
2O
5Many alms givers are superfluous to mix also in conjunction with adding Li
2CO
3Or K
2CO
3The prescription and the technology of acceptor impurity powder one defective material solid phase synthesis of PTC thermistor motor starting chip, thus product cost reduced greatly, improved the output qualification rate.
(2) the concrete technical scheme of porcelain prescription is with BaTiO
3Powder is matrix, employing Y
2O
3, Nb
2O
3And Sb
2O
3Three alms givers surplus is mixed, also Li is added in combination
2CO
3Or K
2CO
3Deng acceptor impurity one defective material solid phase synthesis, and control granulation grade homogeneity, improve porcelain basal body green compact pressed density and be 3.4～3.6g～/cm
3, the ceramic body contraction is that number is little after the roasting like this, smooth surface, no bubble.
(3) the concrete technical scheme of technology is, directly make PTC thermistor motor starting ceramic substrate by ball milling, granulation, dry-pressing, moulding, roasting, (do not need the porcelain pre-burning in the technology, a direct solid phase synthesis), compare with traditional manufacture method and to have reduced precompressed, pre-burning, process procedures such as pulverizing, secondary ball milling again, cut down the consumption of energy, reduce ambient impurities and bring formation pollution in the product into, thereby improve the quality of products.
Tool prescription of the present invention economical rationality, production technique is simple.Can also improve the quality of products, improve product percent of pass, owing to reduced technical process, save the energy, be a kind of innovation to conventional formulation.
Embodiment: embodiment 1
Formulation ratio (mass percent) weighing (weight part)
1、BaTiO
3 88.28％ 203.32
2.、CaCO
3 5.65％ 13.013
3、TiO
2 5.012％ 11.543
4、SiO
2 0.69％ 1.589
5、Y
2O
3
+Nb
2O
3 + 0.175％ 0.403
+Sb
2O
3
6、Li
2CO
3 0.010％ 0.023
7、Mn(NO
3)
2 0.183％ 0.421
∑230.31
Raw material is weighed up in proportion, put into the rolling ball milling jar, in material: ball: the ratio ball milling 24h of water=1: 2: 2, discharging granulation after 120 ± 5 ℃ drying in oven then is with efficient automatic molder moulding; With 14 meters furnace superintendents, 11 groups of warm areas, 18 temperature control continuous tunnel furnaces, 1280～1340 ℃ of high-temperature zone maturing temperatures, high temperature solid-state generated time 1.5～2 hours, advance stove to the time control 15～22 hours of coming out of the stove.Chip after burning till is handled through Ohmic electrode and surface electrode, carries out electric performance test again.
The examination of product result please read audit report book (1) P.7
Embodiment 2
Formulation ratio (mass percent) weighing (weight part)
1、BaTiO
3 94.85％ 219.685
2.、CaCO
3 2.608％ 6.04
3、TiO
2 1.28％ 2.964
4、SiO
2 0.69％ 1.598
5、Y
2O
3
+Nb
2O
3 0.175％ 0.405
+Sb
2O
3
6、Li
2CO
3 0.010％ 0.0231
7、Mn(NO
3)
2 0.183％ 0.42
∑231.61
Operation is with embodiment 1
The examination of product result please read audit report book (2) P.8
Claims (4)
1, solid phase synthesis of PTC thermistor motor startup ceramic chip formula comprises and adopts many donor dopings defective material solid phase synthesis principle, it is characterized in that taking BaTiO
3Powder quality control, three alms givers are superfluous to mix, and in conjunction with adding Li
2CO
3Or K
2CO
3Deng acceptor impurity, its concrete prescription and quality per distribution ratio are:
1.BaTiO
3 88.28～94.85％
2.CaCO
3 2.608～5.65％
3.TiO
2 1.28～5.012％
4.SiO
2 0.68～0.84％
5.[Y
2O
3+Nb
2O
3+Sb
2O
3] 0.153～0.182％
6.Li
2CO
3Or K
2CO
30.008～0.012%
7.Mn(NO
3)
2 0.165～0.192％
2, a solid phase synthesis of PTC thermistor motor startup ceramic chip formula according to claim 1, its characteristic formula and quality per distribution ratio are:
1.BaTiO
3 88.28～94.85％
2.CaCO
3 2.608～5.65％
3.TiO
2 1.28～5.012％
4.SiO
2 0.68～0.84％
5.[Y
2O
3+Nb
2O
3+Sb
2O
3] 0.175
6.Li
2CO
3 0.010
7.Mn(NO
3)
2 0.183
3, a solid phase synthesis of PTC thermistor motor startup ceramic chip formula according to claim 1 and 2 is characterized in that BaTiO
3Powder quality is controlled to be:
Free BaO＜1.5; Specific surface area＜2.0, size-grade distribution D
50≤ 38mm; Barium titanium ratio: Ba/Ti=1; Foreign matter content control: Sr
2+≤ 15ppm, Ca
2+≤ 18ppm, Mg
2+≤ 4ppm, Fe
2+,
3+≤ 3ppm, Na
+≤ 5ppm, k
+≤ 6ppm, Al
3+≤ 5ppm, Si
4+≤ 9ppm.
4, the method for making of a solid phase synthesis of PTC thermistor motor startup ceramic chip according to claim 1 and 2, it is characterized in that adopting ball-milling technology one time, a solid phase synthesis, its technical process is followed successively by: batching, ball milling, oven dry, granulation, dry-pressing, moulding and roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100689771A CN101423388B (en) | 2008-11-05 | 2008-11-05 | Solid phase synthesis of PTC thermistor motor startup ceramic chip formula for one time and production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100689771A CN101423388B (en) | 2008-11-05 | 2008-11-05 | Solid phase synthesis of PTC thermistor motor startup ceramic chip formula for one time and production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101423388A true CN101423388A (en) | 2009-05-06 |
| CN101423388B CN101423388B (en) | 2012-05-02 |
Family
ID=40614299
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100689771A Expired - Fee Related CN101423388B (en) | 2008-11-05 | 2008-11-05 | Solid phase synthesis of PTC thermistor motor startup ceramic chip formula for one time and production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106554201A (en) * | 2016-10-26 | 2017-04-05 | 安徽飞达电气科技有限公司 | A kind of lead-free high-voltage ceramic capacitor material |
| CN107702815A (en) * | 2017-09-25 | 2018-02-16 | 南京航伽电子科技有限公司 | A kind of temperature transmitter suitable for the detection of wide warm area |
| CN113773072A (en) * | 2021-09-06 | 2021-12-10 | 海宁金隆电子陶瓷有限公司 | Processing technology of surface-mounted ceramic thermistor substrate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3812268B2 (en) * | 1999-05-20 | 2006-08-23 | 株式会社村田製作所 | Multilayer semiconductor ceramic element |
-
2008
- 2008-11-05 CN CN2008100689771A patent/CN101423388B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106554201A (en) * | 2016-10-26 | 2017-04-05 | 安徽飞达电气科技有限公司 | A kind of lead-free high-voltage ceramic capacitor material |
| CN107702815A (en) * | 2017-09-25 | 2018-02-16 | 南京航伽电子科技有限公司 | A kind of temperature transmitter suitable for the detection of wide warm area |
| CN113773072A (en) * | 2021-09-06 | 2021-12-10 | 海宁金隆电子陶瓷有限公司 | Processing technology of surface-mounted ceramic thermistor substrate |
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|---|---|
| CN101423388B (en) | 2012-05-02 |
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Owner name: GUIZHOU ZHENHUA HONGYUN ELECTRONIC CO., LTD. Free format text: FORMER OWNER: CHINA ZHENHUA GROUP HONGYUN EQUIPMENT FACTORY Effective date: 20131206 |
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Effective date of registration: 20131206 Address after: 550018 Guizhou province Guiyang city Wudang District North New Road No. 236 Patentee after: Guizhou Zhenhua Hongyun Electronics Co., Ltd. Address before: 208 mailbox 550018, Guizhou City, Guiyang Province Patentee before: Hongyun Appliance Factory, China Zhenghua Group |
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Granted publication date: 20120502 Termination date: 20161105 |
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