CN105036742A - High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof - Google Patents
High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof Download PDFInfo
- Publication number
- CN105036742A CN105036742A CN201510573166.7A CN201510573166A CN105036742A CN 105036742 A CN105036742 A CN 105036742A CN 201510573166 A CN201510573166 A CN 201510573166A CN 105036742 A CN105036742 A CN 105036742A
- Authority
- CN
- China
- Prior art keywords
- resistance material
- temperature
- curie
- coefficient resistance
- hours
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a high-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and a preparation method thereof. The chemical composition formula of the high-curie-point positive-temperature-coefficient resistance material is Ba3Li3Bi2Nb5O20. Original powder of BaCO3, Li2CO3, Bi2O3 and Nb2O5 with the purity (weight percentage) of more than 99.9% is weighed and mixed according to the composition formula of Ba3Li3Bi2Nb5O20, and the lead-free positive-temperature-coefficient resistance material with the curie point reaching up to 380 DEG C is prepared through ball milling, calcinating, secondary ball milling, pelleting, forming, glue discharging, high-temperature sintering, Ag electrode feeding and other procedures. The prepared resistance material is free of lead, so that the harm of lead to health of the human body and the pollution of lead to the environment are avoided. The high-curie-point positive-temperature-coefficient resistance material is low in sintering temperature, low in cost of raw materials and suitable for industrial mass production, and reaches the practical level.
Description
Technical field
The present invention relates to a kind of unleaded positive temperature coefficient resistance material and preparation method thereof, belong to thermo-sensitive material field.
Background technology
PTC pottery (positive temperature coefficient thermal sensitive ceramic) has resistivity and raises and the feature of increase with temperature.It is development in recent years one of electronic material rapidly.Posistor can be divided into switching mode and the large class of offset-type two, and its characteristic and application is also different.Switching mode positive temperature coefficient thermo-sensitive material is mainly used in the protection etc. of rectifier cell of motor, transformer, bearing, high-power silicon, and it is also applied to the aspects such as current limliting, current stabilization, voltage stabilizing and velocity measurement as hear rate element.Offset-type positive temperature coefficient thermo-sensitive material can be used as the temperature compensation of transistor.
Barium titanate-based positive temperature coefficient thermo-sensitive material is a kind of Ferro-Electric Semiconductor material, is development in recent years one of electronic material rapidly.But the Curie temperature of barium titanate only has 120 DEG C, the PTC thermo-sensitive material of Curie temperature more than 120 DEG C is all leaded in the market.Domestic and international raising barium titanate positive temperature coefficient transition temperature mainly realizes by adding lead element.Although this kind of method and technology is more ripe and obtained good effect, lead has very strong toxicity.Products containing lead uses from being prepared into and even all there is very strong harm to last recycling use.Start to completely forbid use in the world in 2006 and had plumbous piezo component.In recent years, along with the demand of environment protection and human kind sustainable development, research novel lead-free PTC resistive material is extremely urgent.Nowadays unleaded positive temperature coefficient thermo-sensitive material mainly macromolecular material, but due to the hot mastication of macromolecular material, greatly limit its use range.Therefore find unleaded high-curie temperature positive temperature coefficient thermo-sensitive material tool and have very important significance.A lot of Chinese patent is had to report environment-friendly type positive temperature coefficient thermo-sensitive material, as (Ba
x sr
y ca
z ) Ti
u o
3, wherein,
x: 0.6 ~ 0.9,
y: 0 ~ 0.3,
z: 0.02 ~ 0.2,
u: 0.98 ~ 1.02; : (Bi
1/2k
1/2-
a/ 2
na
a/2) Ce
1-
b dbO
3, wherein
a=0 ~ 1,
b=0.0005 ~ 0.005 etc., but Curie temperature not high (lower than 160 DEG C).Tang Xingui etc. report BaTiO
3-Bi
0.5na
0.5tiO
3-Bi
0.5k
0.5tiO
3be positive temperature coefficient thermo-sensitive material, it comprehensively employs sol-gel method, solid reaction process, discharge plasma sintering method, and by adulterating prepared by one or more metal oxides, but the highest Curie temperature is also no more than 250 DEG C.
Summary of the invention
The object of this invention is to provide a kind of unleaded high curie point positive temperature coefficient resistance material and preparation method thereof.
The unleaded high curie point positive temperature coefficient resistance material that the present invention relates to chemical constitution formula be: Ba
3li
3bi
2nb
5o
20.
Preparation method's concrete steps of above-mentioned unleaded high curie point positive temperature coefficient resistance material are:
(1) be 99.9%(weight percent by purity) more than BaCO
3, Li
2cO
3, Bi
2o
3and Nb
2o
5starting powder press Ba
3li
3bi
2nb
5o
20composition weigh batching.
(2) material that step (1) prepared through first time ball milling 4 hours, 900 DEG C of pre-burnings 2 hours, second time ball milling 3 hours, granulation, compressing tablet, binder removal, calcine 3 hours for 950 ~ 1000 DEG C, upper Ag electrode, i.e. obtained high curie point positive temperature coefficient resistance material Ba
3li
3bi
2nb
5o
20.
High curie point positive temperature coefficient resistance material Ba prepared by the present invention
3li
3bi
2nb
5o
20have the following advantages: have high Curie temperature, sintering temperature is low, and raw materials cost is low; Composition is unleaded, can not work the mischief to environment with to human body.
Embodiment
embodiment 1:
Be 99.9%(weight percent by purity) more than BaCO
3, Li
2cO
3, Bi
2o
3and Nb
2o
5starting powder press Ba
3li
3bi
2nb
5o
20composition weigh batching; Then by the material planetary mills ball milling for preparing 4 hours, 900 DEG C of pre-burnings 2 hours, second time ball milling 3 hours, granulation, compressing tablet, binder removal, 950 DEG C of calcinings 3 hours, upper Ag electrode, prepares sample; Performance test is carried out to obtained sample, its Curie temperature
t c ≈ 380 DEG C, resistivity is 7.7 Ω m, temperature factor is 9.9%/DEG C, maximum resistance rate/lowest resistivity (liftdrag) is greater than 9.9 × 10
3.
embodiment 2:
Be 99.9%(weight percent by purity) more than BaCO
3, Li
2cO
3, Bi
2o
3and Nb
2o
5starting powder press Ba
3li
3bi
2nb
5o
20composition weigh batching; Then by the material planetary mills ball milling for preparing 4 hours, 900 DEG C of pre-burnings 2 hours, second time ball milling 3 hours, granulation, compressing tablet, binder removal, 975 DEG C of calcinings 3 hours, upper Ag electrode, prepares sample; Performance test is carried out to obtained sample, its Curie temperature
t c ≈ 380 DEG C, resistivity is 9.6 Ω m, temperature factor is 15.4%/DEG C, maximum resistance rate/lowest resistivity (liftdrag) is greater than 1.16 × 10
4.
embodiment 3:
Be 99.9%(weight percent by purity) more than BaCO
3, Li
2cO
3, Bi
2o
3and Nb
2o
5starting powder press Ba
3li
3bi
2nb
5o
20composition weigh batching; Then by the material planetary mills ball milling for preparing 4 hours, 900 DEG C of pre-burnings 2 hours, second time ball milling 3 hours, granulation, compressing tablet, binder removal, 1000 DEG C of calcinings 3 hours, top electrode, prepares sample; Performance test is carried out to obtained sample, its Curie temperature
t c ≈ 380 DEG C, resistivity is 8.7 Ω m, temperature factor is 13.1%/DEG C, maximum resistance rate/lowest resistivity (liftdrag) is greater than 9.3 × 10
3.
Claims (1)
1. high curie point positive temperature coefficient resistance material and preparation method thereof, is characterized in that the chemical constitution formula of described positive temperature coefficient resistance material is: Ba
3li
3bi
2nb
5o
20;
Preparation method's concrete steps of described positive temperature coefficient resistance material are:
(1) be 99.9%(weight percent by purity) more than BaCO
3, Li
2cO
3, Bi
2o
3and Nb
2o
5starting powder press Ba
3li
3bi
2nb
5o
20composition weigh batching;
(2) material that step (1) prepared through first time ball milling 4 hours, 900 DEG C of pre-burnings 2 hours, second time ball milling 3 hours, granulation, compressing tablet, binder removal, calcine 3 hours for 950 ~ 1000 DEG C, upper Ag electrode, i.e. obtained high curie point positive temperature coefficient resistance material Ba
3li
3bi
2nb
5o
20.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510573166.7A CN105036742A (en) | 2015-09-10 | 2015-09-10 | High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510573166.7A CN105036742A (en) | 2015-09-10 | 2015-09-10 | High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105036742A true CN105036742A (en) | 2015-11-11 |
Family
ID=54443790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510573166.7A Pending CN105036742A (en) | 2015-09-10 | 2015-09-10 | High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105036742A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307258A (en) * | 2019-07-11 | 2019-10-08 | 淄博恒星轴承有限公司 | A kind of intelligent bearing and preparation method thereof with thermometric sensing control function |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102976747A (en) * | 2012-12-04 | 2013-03-20 | 广西新未来信息产业股份有限公司 | Lithium niobate doped barium titanate based positive temperature coefficient resistance material and preparation method thereof |
CN104245625A (en) * | 2012-04-20 | 2014-12-24 | 日立金属株式会社 | Semiconductor ceramic composition, method for producing same, and ptc element |
CN104557024A (en) * | 2014-12-18 | 2015-04-29 | 天津大学 | High-Curie-temperature lead-free barium-titanate-base PTCR (positive temperature coefficient of resistance) ceramic material, and preparation and application thereof |
-
2015
- 2015-09-10 CN CN201510573166.7A patent/CN105036742A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104245625A (en) * | 2012-04-20 | 2014-12-24 | 日立金属株式会社 | Semiconductor ceramic composition, method for producing same, and ptc element |
CN102976747A (en) * | 2012-12-04 | 2013-03-20 | 广西新未来信息产业股份有限公司 | Lithium niobate doped barium titanate based positive temperature coefficient resistance material and preparation method thereof |
CN104557024A (en) * | 2014-12-18 | 2015-04-29 | 天津大学 | High-Curie-temperature lead-free barium-titanate-base PTCR (positive temperature coefficient of resistance) ceramic material, and preparation and application thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307258A (en) * | 2019-07-11 | 2019-10-08 | 淄博恒星轴承有限公司 | A kind of intelligent bearing and preparation method thereof with thermometric sensing control function |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102976747A (en) | Lithium niobate doped barium titanate based positive temperature coefficient resistance material and preparation method thereof | |
CN103058651A (en) | Modified barium titanate base unleaded positive temperature coefficient resistance material and preparing method thereof | |
CN104591726A (en) | High-potential gradient zinc oxide voltage piezo-resistor material and preparation method thereof | |
CN103408301B (en) | Ultrahigh voltage ceramic capacitor medium and preparation method thereof | |
CN104030679B (en) | A kind of BaTiO of reducing atmosphere sintering 3base lead-free PTC thermistor ceramic material and preparation method thereof | |
CN101013618A (en) | Leadless PTC thermistor material with high Curie point | |
CN102674832B (en) | Barium-titanate-base lead-free bismuth-containing relaxation ferroelectric ceramic material and preparation method thereof | |
WO2017181912A1 (en) | Lead-free piezoelectric ceramic material and lead-free piezoelectric component | |
CN105198411A (en) | Large-strain low-drive electric field relaxation and ferroelectric composite lead-free piezoelectric ceramic and preparation method thereof | |
CN105645948A (en) | Preparation method of high-voltage gradient and low-leakage current pressure-sensitive resistor ceramic material | |
CN102390997A (en) | High-dielectric-strength potassium sodium niobate based lead-free piezoelectric ceramic as well as preparation method and application thereof | |
CN104557024A (en) | High-Curie-temperature lead-free barium-titanate-base PTCR (positive temperature coefficient of resistance) ceramic material, and preparation and application thereof | |
CN105669193A (en) | K-Na-Li niobate barium titanate-based lead-free piezoelectric ceramic and low-temperature sintering preparation method thereof | |
CN102617137B (en) | BaO-TiO2 lead-free Y5P capacitor dielectric material and preparation method for same | |
CN105036736A (en) | Sodium-bismuth-titanate-base lead-free electrostrictive ceramic material and preparation method thereof | |
CN107903055A (en) | A kind of grade doping bismuth-sodium titanate Quito layer leadless piezoelectric ceramics | |
CN103086712A (en) | Bi2WO6-modified barium titanate-based lead-free positive temperature coefficient resistance material and preparation method thereof | |
CN105036742A (en) | High-curie-point positive-temperature-coefficient resistance material Ba3Li3Bi2Nb5O20 and preparation method thereof | |
CN101412625B (en) | High-curie point lead-free PTC thermal sensitive ceramic resistor material | |
CN105198420A (en) | High curie-point positive temperature coefficient resistance material Ba3Ti2V4O17 and preparation method thereof | |
CN105198421A (en) | High curie-point positive temperature coefficient resistance material Ba2LaV3O11 and preparation method thereof | |
CN105272239A (en) | High-Curie point positive temperature coefficient resistor material Ba3Ti4V4O21 and preparation method thereof | |
CN102584254A (en) | Additive and application thereof in reducing unleaded PTC (positive temperature coefficient) thermal sensitive ceramic sintering temperature | |
CN105174938A (en) | Resistance material Li4Bi3Nb3O14 with high curie-point positive temperature coefficient and preparation method of resistance material | |
CN105272236A (en) | High Curie point positive temperature coefficient resistance material Ba2Li3Bi2Nb5O19 and preparation method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |
|
WD01 | Invention patent application deemed withdrawn after publication |