Preparation method of Bi0.5Na0.5Cu3Ti4O12 giant dielectric non-linear pressure-sensitive ceramics

A pressure-sensitive ceramic, non-linear technology, applied in the field of electronic information component materials, can solve the problem of no record, etc., and achieve the effects of large dielectric constant, simple operation and short cycle.

Inactive Publication Date: 2012-05-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, against Bi 0.5 Na 0.5 Cu 3 Ti 4 o 12 The preparation method of the ceramic, and the non-linear pressure-sensitive characteristics of the ceramic, are not recorded in domestic and foreign literature

Method used

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  • Preparation method of Bi0.5Na0.5Cu3Ti4O12 giant dielectric non-linear pressure-sensitive ceramics
  • Preparation method of Bi0.5Na0.5Cu3Ti4O12 giant dielectric non-linear pressure-sensitive ceramics
  • Preparation method of Bi0.5Na0.5Cu3Ti4O12 giant dielectric non-linear pressure-sensitive ceramics

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Experimental program
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Effect test

Embodiment 1

[0019] Preparation of Bi by Sol-Gel Method Using Citric Acid and Tetraethylamine Oxalate as Complexing Agents 0.5 Na 0.5 Cu 3 Ti 4 o 12 ceramics. First, weigh 0.08mol of citric acid into a 100mL beaker, add 40mL of deionized water, and dissolve under ultrasonic dispersion to form a transparent solution; then weigh 0.04mol of butyl titanate with a graduated straw and transfer it into a 100mL beaker ; Add citric acid aqueous solution to butyl titanate under constant stirring, then ultrasonically disperse for 30 minutes, and heat it in a water bath at 50°C to form a transparent solution with a concentration of 0.5mol / L. The molar ratio is 1:2. In the second step, weigh 0.04mol of tetraethylamine oxalate and put it into a 500mL beaker, add 40mL of deionized water, adjust the pH value to 6 with ammonia water, then weigh 0.005mol of bismuth nitrate, 0.005mol of sodium nitrate and 0.03 mol copper nitrate is added to the above solution, ultrasonically dispersed to form a transpa...

Embodiment 2

[0023]Preparation of Bi by Sol-Gel Method Using Citric Acid and Tetraethylamine Oxalate as Complexing Agents 0.5 Na 0.5 Cu 3 Ti 4 o 12 ceramics. First, weigh 0.08mol of citric acid into a 100mL beaker, add 50mL of deionized water, and dissolve it under ultrasonic dispersion to form a transparent solution; then weigh 0.04mol of butyl titanate with a graduated straw and transfer it into a 100mL beaker ; Add citric acid aqueous solution to butyl titanate under constant stirring, then ultrasonically disperse for 30 minutes, and heat it in a water bath at 50°C to form a transparent solution with a concentration of 1.5mol / L. The molar ratio is 2:5. In the second step, weigh 0.04mol of tetraethylamine oxalate and put it into a 500mL beaker, add 20mL of deionized water, adjust the pH value to 6.5 with ammonia water, then weigh 0.005mol of bismuth nitrate, 0.005mol of sodium nitrate and 0.03 mol of copper nitrate was added to the above solution, ultrasonically dispersed to form a...

Embodiment 3

[0027] Preparation of Bi by Sol-Gel Method Using Citric Acid and Tetraethylamine Oxalate as Complexing Agents 0.5 Na 0.5 Cu 3 Ti 4 o 12 ceramics. First, weigh 0.08mol of citric acid into a 100mL beaker, add 30mL of deionized water, dissolve under ultrasonic dispersion, and form a transparent solution; then weigh 0.04mol of butyl titanate with a graduated straw, and transfer it into a 100mL beaker ; Add citric acid aqueous solution to butyl titanate under constant stirring, then ultrasonically disperse for 30 minutes, and heat it in a water bath at 50°C to form a transparent solution with a concentration of 0.9mol / L. The molar ratio is 1:2. In the second step, weigh 0.04mol of tetraethylamine oxalate and put it into a 500mL beaker, add 40mL of deionized water, adjust the pH value to 6.7 with ammonia water, then weigh 0.005mol of bismuth nitrate, 0.005mol of sodium nitrate and 0.03 mol of copper nitrate was added to the above solution, ultrasonically dispersed to form a tr...

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Abstract

The invention discloses a preparation method of Bi0.5Na0.5Cu3Ti4O12 giant dielectric non-linear pressure-sensitive ceramics, belonging to the field of the electronic information component material. In the preparation method, a sol-gel method for adopting citric acid and ethylene diamine tetraacetic acid as a complexing agent is used to prepare the Bi0.5Na0.5Cu3Ti4O12 ceramics. The ceramics prepared by the preparation method has large dielectric constant and high non-linear pressure-sensitive coefficient, and is a novel capacitive-pressure-sensitive bifunctional ceramic material with wide application prospect and the dielectric performance and the non-linear pressure-sensitive performance of the material can be regulated and controlled by changing the sintering temperature.

Description

technical field [0001] The invention belongs to the field of electronic information component materials. Background technique [0002] In recent years, with the rapid development of electronic products in the direction of lightness, thinness and smallness, various passive devices have attracted more and more attention. The development trend is mainly reflected in the lightweight, miniaturization, integration, Versatility and high reliability. A nonlinear varistor is a resistive element whose resistance changes nonlinearly with the applied voltage, that is, a resistor whose resistance decreases rapidly when the applied voltage value exceeds a certain threshold voltage. Nonlinear varistors are widely used in power systems, electronic circuits, and household appliances, and have important functions such as overvoltage protection, high-performance surge absorption, and high voltage regulation. In addition, studies have shown that increasing the capacitance of the piezoresistiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/462
Inventor 袁松柳田召明尹诗岩
Owner HUAZHONG UNIV OF SCI & TECH
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