La2O3-SnO2-Zn2SnO4 varistor-capacitor bifunctional ceramic material and preparation method thereof

A ceramic material and dual-function technology, applied in the field of ceramic materials, can solve the problems of high cost and complex process of pressure-sensitive-capacitive dual-function ceramics, and achieve the effect of easy acquisition or preparation, good pressure-sensitive properties and simple process

Inactive Publication Date: 2014-09-03
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems that the varistor-capacitance dual-function ceramics in the prior art are complex in technology, high in cost or need to undergo complicated doping to have varistor properties, the invention provides a La 2 o 3 -SnO 2 -Zn 2 SnO 4 Varistor-capacitor dual-functional ceramic material and preparation method thereof, ceramics prepared by the method have good varistor properties, ultra-high dielectric constant and low-voltage sensitive voltage

Method used

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  • La2O3-SnO2-Zn2SnO4 varistor-capacitor bifunctional ceramic material and preparation method thereof
  • La2O3-SnO2-Zn2SnO4 varistor-capacitor bifunctional ceramic material and preparation method thereof

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preparation example Construction

[0024] A La 2 o 3 -SnO 2 -Zn 2 SnO 4 A method for preparing a pressure-sensitive-capacitance dual-function ceramic material, comprising the following steps:

[0025] Step 1: Zn 2 SnO 4 Preparation of powder

[0026] The analytically pure chemical reagent SnO 2 Mix with ZnO in a molar ratio of 1:2, and put it into a nylon ball mill tank, then add alcohol and ball mill for 12 hours at a speed of 120 rpm to obtain a slurry;

[0027] After the ball milled slurry is dried at 21°C~150°C, it is sent into a powder tablet press, and pressed into a disc with a diameter of 25-30mm under the condition of 80-120MPa. Put it into the muffle furnace, calcined at 1000°C for 2 hours, then cool it down to 20°C naturally, and crush the calcined disc to get Zn 2 SnO 4 Powder, spare;

[0028] Step 2: Weigh the analytically pure chemical reagent La respectively 2 o 3 , SnO 2 and the Zn prepared in step one 2 SnO 4 Dry-mix the powder, then put it into a nylon ball mill tank, and add a...

Embodiment 1

[0034] A La 2 o 3 -SnO 2 -Zn 2 SnO 4 Varistor-capacitance bifunctional ceramic material, the ceramic material is made of La 2 o 3 Powder, Zn 2 SnO 4 Powder and SnO 2 The powder is mixed and pressed, and sintered, and the molar ratio of each component is La 2 o 3 : SnO 2 : Zn 2 SnO 4 It is 0.1:85:15.

[0035] A La 2 o 3 -SnO 2 -Zn 2 SnO 4 Varistor-capacitance dual-function ceramic material, the preparation method of which is as follows:

[0036] Step 1: Zn 2 SnO 4 Preparation of powder

[0037] The analytically pure chemical reagent SnO 2 Mix with ZnO in a molar ratio of 1:2, and put it into a nylon ball mill tank, then add alcohol and ball mill for 12 hours at a speed of 120 rpm to obtain a slurry;

[0038] After the ball milled slurry is dried at 21°C~150°C, it is sent into a powder tablet press, and pressed into a disc with a diameter of 25mm under the condition of 80MPa, and the pressed disc is sent into a muffle In the furnace, calcined at 1000°C fo...

Embodiment 2

[0043] A La 2 o 3 -SnO 2 -Zn 2 SnO 4 Varistor-capacitance bifunctional ceramic material, the ceramic material is made of La 2 o 3 Powder, Zn 2 SnO 4 Powder and SnO 2 The powder is mixed and pressed, and sintered, and the molar ratio of each component is La 2 o 3 : SnO 2 : Zn 2 SnO 4 It is 0.4:85:15.

[0044] A La 2 o 3 -SnO 2 -Zn 2 SnO 4 Varistor-capacitance dual-function ceramic material, the preparation method of which is as follows:

[0045] Step 1: Zn 2 SnO 4 Preparation of powder

[0046] The analytically pure chemical reagent SnO 2 Mix with ZnO in a molar ratio of 1:2, and put it into a nylon ball mill tank, then add alcohol and ball mill for 12 hours at a speed of 120 rpm to obtain a slurry;

[0047] After the milled slurry is dried at 21°C~150°C, it is sent into a powder tablet press, and pressed into a disc with a diameter of 30mm under the condition of 100MPa, and then the prepared disc is sent to the horse In the furnace, calcined at 1000°C f...

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Abstract

The invention relates to a La2O3-SnO2-Zn2SnO4 varistor-capacitor bifunctional ceramic material. The ceramic material is formed by mixing, pressing and sintering SnO2 powder, Zn2SnO4 powder and La2O3 powder, and the mol ratio of all the components (La2O3, SnO2 and Zn2SnO4) is X:85:15; X=0 / 1-2.5. The La2O3-SnO2-Zn2SnO4 composite ceramic material prepared by mixing, pressing and sintering the SnO2 powder, the Zn2SnO4 powder and the La2O3 powder has good varistor properties, superhigh dielectric constant and low varistor voltage.

Description

technical field [0001] The present invention relates to a kind of ceramic material in the field of inorganic non-metal, specifically a kind of La 2 o 3 -SnO 2 -Zn 2 SnO 4 A pressure-sensitive-capacitance dual-function ceramic material and a preparation method thereof. Background technique [0002] Varistor ceramic is a material whose resistance value is sensitive to external voltage. Its resistance value drops sharply with the increase of voltage at a certain temperature and within a certain voltage range, and it has nonlinear volt-ampere characteristics. In recent years, with the improvement of integration in the field of electronic circuits, electronic equipment has developed towards miniaturization and multi-function, which has gradually reduced the driving voltage and withstand voltage value of various electronic components in the circuit, which will lead to overvoltage caused by operation, human body static electricity, etc. The probability of misoperation or damag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/457C04B35/626C04B35/622
Inventor 梅方李立本臧国忠雷建飞曹京晓
Owner HENAN UNIV OF SCI & TECH
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