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PTC thermistor device and preparation method thereof

A thermistor and device technology, applied in the field of PTC thermistor device and its preparation, can solve the problems of low Curie temperature, low lift-to-resistance ratio, low alpha coefficient, etc., so as to reduce grain boundary resistance and improve good quality. efficiency, reducing power consumption

Inactive Publication Date: 2018-04-06
SICHUAN QIXING ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of low Curie temperature, high resistivity, low lift-to-drag ratio and low α coefficient of existing thermistor devices, the invention provides a PTC thermistor device and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of PTC thermistor device, described raw material is measured in parts by weight, comprises: BaTiO 3 70 parts, PbCO 3 8 copies, B 2 o 3 1 part, SiO 2 0.2 parts, P 2 o 5 0.1 parts, TiO 2 3 servings, Nb 2 o 3 0.2 parts, Y 2 o 3 0.5 parts, MnCl 2 1 part, Na 2 CO 3 0.05 parts, Yb 2 o 3 0.02 parts.

[0024] Its preparation method comprises the following steps:

[0025] (1) primary mixing: BaTiO 3 , PbCO 3 , B 2 o 3 , SiO 2 , P 2 o 5 ,TiO 2 , Nb 2 o 3 , Y 2 o 3 Mix and mix uniformly to obtain a mixed material, the primary premixed material: agate ball: alcohol=1:1.2:1.2, perform ball milling, and the ball milling time is 12h;

[0026] (2) Primary sintering: put the ball-milled mixed material into a muffle furnace for sintering, the heating rate is 5°C / min, the temperature is raised to 800°C, the temperature is kept at a constant temperature for 3 hours, and the temperature is naturally lowered to obtain the primary mixed material; ...

Embodiment 2

[0032] A kind of PTC thermistor device, described raw material is measured in parts by weight, comprises: BaTiO 3 85 parts, PbCO 3 15 copies, B 2 o 3 3 parts, SiO 2 0.4 parts, P 2 o 5 0.25 parts, TiO 2 5 parts, Nb 2 o 3 0.4 parts, Y 2 o 3 0.8 parts, MnCl 2 3 parts, Na 2 CO 3 0.1 parts, Yb 2 o 3 0.05 parts.

[0033] Its preparation method comprises the following steps:

[0034] (1) primary mixing: BaTiO 3 , PbCO 3 , B 2 o 3 , SiO 2 , P 2 o 5 ,TiO 2 , Nb 2 o 3 , Y 2 o 3 Mix and mix evenly to obtain a mixed material, the primary premixed material: agate ball: alcohol = 1:1.8:1.8, perform ball milling, and the ball milling time is 12-18h;

[0035] (2) Primary sintering: put the mixed material after ball milling into a muffle furnace for sintering, the heating rate is 10°C / min, the temperature is raised to 900°C, the temperature is kept constant for 3 hours, and the temperature is naturally lowered to obtain the primary mixed material;

[0036...

Embodiment 3

[0041] A kind of PTC thermistor device, described raw material is measured in parts by weight, comprises: BaTiO 3 75 parts, PbCO 3 10 copies, B 2 o 3 1 part, SiO 2 0.3 parts, P 2 o 5 0.1 parts, TiO 2 4 servings, Nb 2 o 3 0.2 parts, Y 2 o 3 0.6 parts, MnCl 2 2 parts, Na 2 CO 3 0.05 parts, Yb 2 o 3 0.03 parts.

[0042] Its preparation method comprises the following steps:

[0043] (1) primary mixing: BaTiO 3 , PbCO 3 , B 2 o 3 , SiO 2 , P 2 o 5 ,TiO 2 , Nb 2 o 3 , Y 2 o 3 Mix and mix uniformly to obtain a mixed material, the primary premixed material: agate ball: alcohol=1:1.2:1.2, perform ball milling, and the ball milling time is 12h;

[0044] (2) Primary sintering: put the ball-milled mixed material into a muffle furnace for sintering, the heating rate is 5°C / min, the temperature is raised to 800°C, the temperature is kept at a constant temperature for 3 hours, and the temperature is naturally lowered to obtain the primary mixed material;...

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Abstract

The invention discloses a PTC thermistor and a preparation method thereof. The raw materials of the PTC thermistor include 70-85 parts of BaTiO3, 8-15 parts of PbCO3, and 1-3 parts of B2O3 in parts by weight. SiO2 0.2-0.4 parts, P2O5 0.1-0.25 parts, TiO2 3-5 parts, Nb2O3 0.2-0.4 parts, Y2O3 0.5-0.8 parts, MnCl2 1-3 parts, Na2CO3 0.05-0.1 parts, Yb2O3 0.02-0.05 parts. After two times of ball milling and sintering, the ceramic sheet is prepared by the solid-phase synthesis method, and then the electrode is prepared to obtain the PTC thermistor. The resistance Curie point of the PTC thermistor is 180-210°C, which increases the lift-to-drag ratio of the thermistor and reduces the resistance of the thermistor.

Description

technical field [0001] The invention belongs to the technical field of electronic components, and in particular relates to a PTC thermistor device and a preparation method thereof. Background technique [0002] PTC thermistor devices are widely used in electronic products such as computers and their peripheral equipment, mobile phones, battery packs, and telecommunication, and play the role of over-current or over-temperature protection. In particular, barium titanate-based positive temperature coefficient thermistors have a relatively large number of temperature systems, and a series of characteristics produced by them have good applications in many industries. However, the Curie temperature of the existing barium titanate-based positive temperature coefficient thermistor device is 120°C, which is difficult to meet the requirements of the current social development for thermistors. At the same time, there are still high resistivity and low lift-to-drag ratio. , low alpha c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/626C04B41/88C04B41/89H01C7/02
CPCC04B35/465C04B35/62615C04B41/009C04B41/5116C04B41/5155C04B41/52C04B41/88C04B41/89C04B2235/3224C04B2235/3225C04B2235/3232C04B2235/3251C04B2235/34C04B2235/3409C04B2235/3418C04B2235/442C04B2235/444H01C7/023C04B41/4501
Inventor 江明泓
Owner SICHUAN QIXING ELECTRONICS
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