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Bismuth titanate based perovskite phase thermosensitive ceramic composite material as well as preparation method and application thereof

A technology of perovskite phase and heat-sensitive ceramics, which is applied in the direction of non-adjustable metal resistors, resistors, electrical components, etc., can solve problems such as aging and irreversible changes in temperature resistance characteristics, and achieve high density, small grains, Grainy and uniform effect

Active Publication Date: 2018-11-23
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When traditional spinel-type transition metal oxide thermosensitive materials are used at high temperatures, they often experience serious aging phenomena, and even irreversible changes in temperature resistance characteristics, which also promotes the research on high-temperature thermistor materials and provides new Development of high-temperature thermistor materials presents new challenging topics

Method used

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  • Bismuth titanate based perovskite phase thermosensitive ceramic composite material as well as preparation method and application thereof
  • Bismuth titanate based perovskite phase thermosensitive ceramic composite material as well as preparation method and application thereof
  • Bismuth titanate based perovskite phase thermosensitive ceramic composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Dissolve bismuth nitrate in ethylene glycol, stir in a water bath at a constant temperature of 40°C until completely dissolved, and prepare a 0.5mol / L alkoxide solution for later use;

[0025] b. Using sodium acetate and zinc acetate with a molar percentage of Na:Zn=9:1 as raw materials, mix and dissolve in absolute ethanol, prepare a 0.5mol / L ion mixed solution, and set aside;

[0026] c. Dissolve tetrabutyl titanate in absolute ethanol to prepare a 1mol / L solution, add acetylacetone dropwise to stabilize tetrabutyl titanate, stir evenly to obtain a mixed solution, and set aside;

[0027] d, the solution obtained in step a is slowly dripped into the solution obtained in step b, after mixing evenly, add citric acid complexing agent, citric acid complexing agent and total metal ion Bi 3+ 、Na + , Zn 2+ and Ti 4+ The molar ratio is 1.5:1;

[0028] e. Slowly add the mixed solution obtained in step c to the mixed solution obtained in step d, stir while adding dropwise...

Embodiment 2

[0034] a. Dissolve bismuth nitrate in ethylene glycol, stir in a water bath at a constant temperature of 70°C until completely dissolved, and prepare a 0.5mol / L alkoxide solution for later use;

[0035] b. Using sodium acetate and zinc acetate with a molar percentage of Na:Zn=1:9 as raw materials, mix and dissolve in absolute ethanol, prepare a 0.5mol / L ion mixed solution, and set aside;

[0036] c. Dissolve tetrabutyl titanate in absolute ethanol to prepare a 1mol / L solution, add acetylacetone dropwise to stabilize tetrabutyl titanate, stir evenly to obtain a mixed solution, and set aside;

[0037] d, the solution that step a obtains is slowly added dropwise in the solution that step b obtains, after mixing uniformly, add citric acid complexing agent, citric acid complexing agent and total metal ion Bi 3+ 、Na + , Zn 2+ and Ti 4+ The molar ratio is 1.5:1;

[0038] e. Slowly add the mixed solution obtained in step c to the mixed solution obtained in step d, stir while addin...

Embodiment 3

[0044] a. Dissolve bismuth nitrate in ethylene glycol, stir in a water bath at a constant temperature of 55°C until completely dissolved, and prepare a 0.5mol / L alkoxide solution for later use;

[0045] b. Using sodium acetate and zinc acetate with a molar percentage of Na:Zn=1:1 as raw materials, mix and dissolve in absolute ethanol, prepare a 0.5mol / L ion mixed solution, and set aside;

[0046] c. Dissolve tetrabutyl titanate in absolute ethanol to prepare a 1mol / L solution, add acetylacetone dropwise to stabilize tetrabutyl titanate, stir evenly to obtain a mixed solution, and set aside;

[0047] d, the solution that step a obtains is slowly added dropwise in the solution that step b obtains, after mixing uniformly, add citric acid complexing agent, citric acid complexing agent and total metal ion Bi 3+ 、Na + , Zn 2+ and Ti 4+ The molar ratio is 1.5:1;

[0048] e. Slowly add the mixed solution obtained in step c to the mixed solution obtained in step d, stir while addin...

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Abstract

The invention relates to a bismuth titanate based perovskite phase thermosensitive ceramic composite material as well as a preparation method and application thereof. The material takes metal salt asa raw material, and xNa0.5Bi0.5TiO3-(1-x)Zn0.5Bi0.5TiO3 powder is prepared by adopting a Pechini method, wherein x is greater than 0 and less than 1; the powder is subjected to a processing process ofdrying, pre-firing, grinding, pre-pressing and molding, carrying out cold isostatic pressing and sintering to prepare the bismuth titanate based perovskite phase thermosensitive ceramic composite material. The material has the advantages of small and uniform crystal grains and good density; the material has an obvious negative temperature coefficient property in a temprature range of 350 to 900 DEG C; an electric property research results shows that when the compounding amount of bismuth titanate is increased, the resistance value of the ceramic material is increased and the B value is reduced, so that the material is a novel thermosensitive ceramic material which is applicable to temperature measurement and temperature control of a high-temperature region.

Description

technical field [0001] The invention relates to a bismuth titanate-based perovskite-phase thermosensitive ceramic composite material and its preparation method and application, especially the material is applied to the field of high-temperature thermistor, and has obvious negative temperature in the temperature range of 350-900°C It is a new type of perovskite phase thermosensitive ceramic material suitable for preparing high temperature thermistors. Background technique [0002] As one of the three pillars of human society, materials play a pivotal role in the national economy. With the rapid development of high-tech industries such as electronics, communication, and control, the requirements for intelligent materials, multi-functionalization, and miniaturization of devices are constantly increasing. The research and development of functional materials occupies an increasingly important role in the high-tech field. status. Negative temperature coefficient thermosensitive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/624H01C7/04
CPCC04B35/475C04B35/624C04B2235/3201C04B2235/3234C04B2235/3284H01C7/045
Inventor 张惠敏刘婷常爱民姜辉
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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