PTC thermistor ceramic material as well as preparation method and application thereof

A technology of thermistors and ceramic materials, applied in the direction of resistance manufacturing, heating element materials, resistors, etc., can solve the problems of reduced calorific value, lower working temperature, and lower heating power

Inactive Publication Date: 2021-04-23
江苏钧瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] PTC material is used as a heating element, and the resistance rises after working for a long time, resulting in a lower working temperature, a decrease in heat generation, and a decrease in heating power

Method used

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  • PTC thermistor ceramic material as well as preparation method and application thereof
  • PTC thermistor ceramic material as well as preparation method and application thereof
  • PTC thermistor ceramic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] After preparing the SB series basic ceramic powder (synthetic material), weigh the SiO 2 ,Al 2 o 3 ,MnO 2 , mixed by ball milling in deionized water, then dried and added with a binder to granulate, and pressed at a pressure of 10MPa to make a square green body with a size of 24×15×2.9mm. In an air atmosphere, the pressed square element The billet is sintered at a temperature of 1280-1330 ° C for 30 minutes, so that the square green billet is fully sintered and the solid phase reaction is realized. The surface of the ceramic obtained after sintering is ground to keep the thickness at 2.4mm, and then coated on the surface of the ceramic sheet Ag and Zn electrode paste, and fired at 480-520 ° C, heat preservation for 8 minutes, solidified the electrode, finally obtained PTC thermistor ceramic sheet 1, and tested its performance, the performance of PTC thermistor ceramic sheet 1 is shown in the table 2.

[0064] The results of Example 1 are shown in Table 2.

[0065] ...

Embodiment 2

[0073] After preparing the SB series basic ceramic powder (synthetic material), weigh the SiO 2 ,Al 2 o 3 ,MnO 2 ,MnCO 3 , mixed by ball milling in deionized water, then dried, added with a binder, granulated, and pressed at a pressure of 10 MPa to make a square green body with a size of 24×15×2.9 mm. In the air atmosphere, the pressed square green body is sintered at 1270-1310° C. for 30 minutes, so that the square green body is fully sintered and solid-state reaction is realized. Grind the ceramic surface obtained after sintering to keep the thickness at 2.4 mm, then coat Ag and Zn electrode paste on the surface of the ceramic sheet, and fire at 480-520 ° C for 8 minutes to solidify the electrode, and finally The PTC thermistor ceramic sheet 2 was obtained, and its performance was tested. The performance of the PTC thermistor ceramic sheet 2 is shown in Table 3.

[0074] The results of Example 2 are shown in Table 3.

[0075] Table 3: Sample composition and performance...

Embodiment 3

[0082] After preparing the SB series basic ceramic powder (synthetic material), weigh the SiO 2 ,Al 2 o 3 ,MnCO 3, mixed by ball milling in deionized water, then dried, added with a binder, granulated, and pressed at a pressure of 10 MPa to make a square green body with a size of 24×15×2.9 mm. In the air atmosphere, the pressed square green body is sintered at 1240-1290° C. for 30 minutes, so that the square green body is fully sintered and solid-state reaction is realized. Grind the ceramic surface obtained after sintering to keep the thickness at 2.4 mm, then coat Ag and Zn electrode paste on the surface of the ceramic sheet, and fire at 480-520 ° C for 8 minutes to solidify the electrode, and finally The PTC thermistor ceramic sheet 3 was obtained, and its performance was tested. The performance of the PTC thermistor ceramic sheet 3 is shown in Table 3.

[0083] The results of Example 3 are shown in Table 4.

[0084] Table 4: Sample composition and performance list of ...

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Abstract

The invention discloses a PTC thermistor ceramic material and a preparation method and application thereof. The PTC thermistor ceramic material is composed of basic ceramic powder based on barium lead titanate and an additive material, wherein the additive material comprises any one or any two of oxide of Si, oxide of Al, oxide of Mn and carbonate of Mn. The invention provides a PTC thermistor material of which the resistance nonlinear coefficient is controllable and adjustable in a range of 5-49%.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a PTC thermistor ceramic material and a preparation method and application thereof. Background technique [0002] PTC ceramics generally refer to thermistor materials or components with positive temperature coefficient of resistance (Positive Temperature Coefficient Resistance). PTC ceramics have the advantages of temperature sensitivity, energy saving, no open flame and safety, and have been widely used in automobiles, home appliances, communications, automation control and other fields. The heater made of PTC as the constant temperature heating element has high reliability and safety, and the heat generation can be automatically adjusted with the change of the ambient temperature. In the fields of current limiting and temperature sensing, due to the unique characteristic of PTC that the resistance jumps with temperature changes, these devices have the characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B41/88H01C7/02H01C17/00H05B3/14G01K7/22
CPCC04B35/4684C04B35/622C04B41/88C04B41/515H01C7/025H01C17/00H05B3/141G01K7/22C04B2235/3208C04B2235/3232C04B2235/3227C04B2235/3251C04B2235/3418C04B2235/3217C04B2235/3267C04B2235/3262C04B2235/656C04B2235/6567C04B41/5116C04B41/4539C04B41/0072
Inventor 朱兴文
Owner 江苏钧瓷科技有限公司
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