Piezoresistor ceramic material and preparation method thereof

A technology of ceramic materials and varistors, which is applied in the field of varistor ceramic materials and its preparation, to achieve the effects of strong damage resistance, low price, and good nonlinear performance

Inactive Publication Date: 2018-03-02
FOSHAN RUISHENGTONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comprehensive performance of the varistor ceramic materials currently on the market needs to be further improved, such as nonlinear coefficient, leakage current and stability, etc.

Method used

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  • Piezoresistor ceramic material and preparation method thereof
  • Piezoresistor ceramic material and preparation method thereof
  • Piezoresistor ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A varistor ceramic material, prepared from the following components in parts by weight: 3 parts of silicon carbide, 3 parts of silicon nitride, 3 parts of kaolin, 50 parts of tin dioxide, 0.1 part of vanadium pentoxide, and 1 part of boron carbide , 1 part of strontium carbonate, 1 part of manganese carbonate, 1 part of monazite, 3 parts of spherical nano-titanium dioxide, 0.5 part of polyanionic cellulose, 0.2 part of potassium perchlorate, 0.2 part of beeswax, 1 part of orthophosphate, 0.5 part of polycarbonate , 60 parts of absolute ethanol. The preparation method of the above-mentioned varistor ceramic material is:

[0022] (1) Mix silicon carbide, silicon nitride, kaolin, tin dioxide, vanadium pentoxide, boron carbide, strontium carbonate, manganese carbonate, monazite, spherical nano-titanium dioxide and absolute ethanol, put them into a ball mill jar Ball milling at 800r / min for 4 hours;

[0023] (2) Put it in an oven and dry it at a temperature of 100°C;

[0...

Embodiment 2

[0028] A varistor ceramic material, prepared from the following components in parts by weight: 3.5 parts of silicon carbide, 3.5 parts of silicon nitride, 3.5 parts of kaolin, 55 parts of tin dioxide, 0.15 parts of vanadium pentoxide, and 1.5 parts of boron carbide , 1.5 parts of strontium carbonate, 1.5 parts of manganese carbonate, 1.5 parts of monazite, 4 parts of spherical nano-titanium dioxide, 0.6 parts of polyanionic cellulose, 0.3 parts of potassium perchlorate, 0.3 parts of beeswax, 1.5 parts of orthophosphate, 0.6 parts of polycarbonate , 65 parts of absolute ethanol.

[0029] The preparation method of the above-mentioned varistor ceramic material is:

[0030] (1) Mix silicon carbide, silicon nitride, kaolin, tin dioxide, vanadium pentoxide, boron carbide, strontium carbonate, manganese carbonate, monazite, spherical nano-titanium dioxide and absolute ethanol, put them into a ball mill jar Ball milling at 800r / min for 4 hours;

[0031] (2) Put it in an oven and dry...

Embodiment 3

[0036] A varistor ceramic material, prepared from the following components in parts by weight: 4 parts of silicon carbide, 4 parts of silicon nitride, 4 parts of kaolin, 60 parts of tin dioxide, 0.2 parts of vanadium pentoxide, and 2 parts of boron carbide , 1.5 parts of strontium carbonate, 2 parts of manganese carbonate, 1.5 parts of monazite, 4.5 parts of spherical nano-titanium dioxide, 0.65 parts of polyanionic cellulose, 0.35 parts of potassium perchlorate, 0.35 parts of beeswax, 1.5 parts of orthophosphate, 0.75 parts of polycarbonate , 70 parts of absolute ethanol.

[0037] The preparation method of the above-mentioned varistor ceramic material is:

[0038] (1) Mix silicon carbide, silicon nitride, kaolin, tin dioxide, vanadium pentoxide, boron carbide, strontium carbonate, manganese carbonate, monazite, spherical nano-titanium dioxide and absolute ethanol, put them into a ball mill jar Ball milling at 850r / min for 4.5 hours;

[0039] (2) Put it in an oven and dry it...

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PUM

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Abstract

The invention provides a varistor ceramic material and a preparation method thereof. The preparation method is as follows: (1) Mix and ball mill silicon carbide, silicon nitride, kaolin, tin dioxide, vanadium pentoxide, boron carbide, strontium carbonate, manganese carbonate, monazite, spherical nano-titanium dioxide and absolute ethanol; (2 ) into an oven for drying; (3) Add polyanionic cellulose, potassium perchlorate, beeswax, orthophosphate and polycarbonate, mix well and add to a twin-screw extruder for extrusion and granulation; (4) Put it into a single-axis hydraulic press and press it into a disc, and then remove the glue at a temperature of 600-700°C; (5) Put it in a sintering furnace and sinter it. The varistor ceramic material of the invention has very low leakage current, high nonlinear coefficient, good nonlinear performance, high density, strong damage resistance, good anti-aging effect, simple preparation method and low price.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a varistor ceramic material and a preparation method thereof. Background technique [0002] Varistor ceramic material refers to a semiconductor ceramic material that has nonlinear volt-ampere characteristics at a certain temperature and within a certain voltage range, and its resistance decreases sharply with the increase of voltage. According to this nonlinear volt-ampere characteristic, this semiconductor ceramic material can be used to make a nonlinear resistor, that is, a piezoresistor. Varistors are used in a wide range of applications and can be used for spark extinguishing, overvoltage protection, preparation of lightning rods, voltage standards, and voltage stabilization. Because varistors play an important role in protecting equipment safety and ensuring normal and stable operation of equipment, they have been widely used in aerospace, post and telecommunications, ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/457C04B35/622C04B35/636C04B35/634C04B35/632
CPCC04B35/457C04B35/622C04B35/632C04B35/63464C04B35/6365C04B2235/3213C04B2235/3232C04B2235/3239C04B2235/3262C04B2235/349C04B2235/3821C04B2235/3826C04B2235/3873C04B2235/444C04B2235/447C04B2235/449
Inventor 王金英
Owner FOSHAN RUISHENGTONG TECH CO LTD
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