Perovskite-like high-temperature thermistor material with different A-site elements and preparation method thereof

A perovskite type, varistor technology, applied in non-adjustable metal resistors, resistors with negative temperature coefficients, resistors, etc., can solve the deterioration of thermal performance, cannot meet high temperature applications above 300 ℃, phase structure instability, etc.

Inactive Publication Date: 2020-09-04
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional spinel structure thermistor material has unstable phase structure and deteriorated thermal performance at high temperature, and cannot meet high temperature applications above 300 °C

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Perovskite-like high-temperature thermistor material with different A-site elements and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a. First press CaCu 3 Ti 4 o 12 The composition of the composition, respectively weighed and analyzed pure calcium carbonate, copper oxide and titanium dioxide were mixed, and the mixed raw materials were placed in an agate mortar and ground for 5 hours to obtain a powder;

[0017] b. Calcinate the ground powder in step a at a temperature of 800°C for 4 hours, and grind for 5 hours to obtain CaCu 3 Ti 4 o 12 Powder;

[0018] c, the powder material that step b obtains is with 20Kg / cm 2 The pressure is briquetted for 1 minute, and the formed block material is subjected to cold isostatic pressing, kept at a pressure of 300MPa for 2 minutes, and then sintered at a temperature of 1000°C for 8 hours to obtain a high-temperature heat-sensitive ceramic material ;

[0019] d. Coat the front and back sides of the ceramic material sintered in step c with silver paste electrodes, and then anneal at a temperature of 600°C for 30 minutes to obtain a temperature range of 75°C-6...

Embodiment 2

[0021] a. Press La 2 / 3 Cu 3 Ti 4 o 12 The composition of lanthanum trioxide, copper oxide and titanium dioxide were weighed and mixed respectively, and the mixed raw materials were placed in an agate mortar and ground for 10 hours to obtain a powder;

[0022] b. Calcining the ground powder in step a at a temperature of 900°C for 6 hours, and grinding for 7 hours to obtain La 2 / 3 Cu 3 Ti 4 o 12 Powder;

[0023] c, the powder material that step b obtains is with 15Kg / cm 2 The pressure is briquetted for 0.5 minutes, and the formed block material is subjected to cold isostatic pressing, kept at a pressure of 400MPa for 1 minute, and then sintered at a temperature of 1100°C for 6 hours to obtain a high-temperature heat-sensitive ceramic material ;

[0024] d. Coat the front and back sides of the ceramic material sintered in step c with silver paste electrodes, and then anneal at a temperature of 600°C for 30 minutes to obtain a temperature range of 75°C-600°C and a mater...

Embodiment 3

[0026] a. Press Y 2 / 3 Cu 3 Ti 4 o 12 The composition of yttrium trioxide, copper oxide and titanium dioxide were weighed and mixed respectively, and the mixed raw materials were placed in an agate mortar and ground for 7 hours to obtain a powder;

[0027] b. Calcinate the ground powder in step a at a temperature of 1000°C for 8 hours, and grind for 11 hours to obtain Y 2 / 3 Cu 3 Ti 4 o 12 Powder;

[0028] c, the powder material that step b obtains is with 10Kg / cm 2 The pressure is briquetted for 2 minutes, and the formed block material is subjected to cold isostatic pressing, kept at a pressure of 350MPa for 3 minutes, and then sintered at a temperature of 1200°C for 4 hours to obtain a high-temperature heat-sensitive ceramic material ;

[0029] d. Coat the front and back sides of the ceramic material sintered in step c with silver paste electrodes, and then anneal at a temperature of 600°C for 30 minutes to obtain a temperature range of 75°C-600°C and a material const...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a perovskite-like high-temperature thermistor material with different A-site elements and a preparation method of the perovskite-like high-temperature thermistor material. According to the material, the perovskite-like high-temperature thermistor material with different A-site elements is obtained from calcium carbonate, copper oxide, titanium dioxide, yttrium oxide, lanthanum trioxide and strontium oxide as raw materials by mixing, grinding, calcining, carrying out cold isostatic pressing, sintering at high temperature, and coating and burning an electrode; the constant of the material is B300 DEG C / 500 DEG C = 5900K-11000K; and the resistivity is 6.01 * 10 < 5 > Omega cm to 3.2 * 10 < 9 > Omega cm at the temperature of 75 DEG C. The perovskite-like high-temperature thermistor material with different A-site elements is stable in performance and good in consistency, has an obvious negative temperature coefficient characteristic within the temperature range of 75 DEG C to 600 DEG C, and is suitable for manufacturing high-temperature thermistors.

Description

technical field [0001] The invention relates to a perovskite-like high-temperature thermistor material with different A-site elements and a preparation method thereof. The thermistor material has obvious negative temperature coefficient characteristics in the temperature range of 75°C-600°C, and is an applicable A new type of thermistor material for the manufacture of high temperature thermistors. Background technique [0002] With the rapid development of contemporary science and information technology, the application of negative temperature coefficient (NTC) thermistor ceramics in temperature detection, control and compensation occupies an important position in the electronic ceramic manufacturing industry. In different temperature measurement applications, high-temperature NTC thermistors need to consider different accuracy, power consumption and cost issues, so different B values ​​and different resistance value ranges are required. High-temperature NTC thermistors need...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C04B35/462C04B35/622H01C7/04
CPCC04B35/462C04B35/465C04B35/622C04B2235/3208C04B2235/3213C04B2235/3225C04B2235/3227C04B2235/3281C04B2235/602C04B2235/6567C04B2235/662H01C7/045
Inventor 张博常爱民魏亚鑫付志龙
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap