Cofired ceramic heating member preparation technology

The invention relates to a technology for a ceramic heating body and a preparation process, which is applied in the field of preparation technology of the heating body, and can solve the problems of reducing the service life of the heating element, uneven heat transfer of the heater, and high cost, so as to accelerate the diffusion of oxygen ions, reduce the production cost, and reduce the production cost. Efficiency-enhancing effect

Active Publication Date: 2015-08-26
广东国研新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional silicon nitride ceramic heating sheet is formed by burying tungsten wire in silicon nitride powder to form a sheet-shaped body and hot-pressing and sintering. Due to the limitation of the process, the heater produced by this process is difficult to position and shape the tungsten wire. The position is shifted during the process, which causes the overall heat transfer of the heater to be uneven. At the same time, due to the obvious interface between the tungsten wire and the silicon nitride powder, it is difficult to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0098] Example 1.

[0099] The preparation process of a laminated co-fired ceramic heating body of this embodiment includes the following process steps:

[0100] a. Mixing material: weigh 65% Si according to mass percentage 3 N 4 , 10% MgO, 5% Y 2 O 3 , 5% Al 2 O 3 , 5% SiO 2 , 5% La 2 O 3 , 5% BN and mix evenly to make ceramic substrate powder;

[0101] b. Ball milling: Add the ceramic substrate powder prepared in step a to the grinding ball, solvent and adhesive and put it into the ball milling tank for wet ball milling. The time for wet ball milling is 8 hours;

[0102] c. Defoaming: defoaming the mixture after wet ball milling in step b under vacuum conditions;

[0103] d. Forming and drying: the mixture in step c is cast into a ceramic substrate with a casting machine or rolled into a ceramic substrate with a film rolling equipment, and the ceramic substrate is dried;

[0104] e. Printing: The resistive paste is printed on the surface of the ceramic substrate after drying in step d ...

Example Embodiment

[0108] Example 2.

[0109] The preparation process of a laminated co-fired ceramic heating body of this embodiment includes the following process steps:

[0110] a. Mixing material: weigh 98% Si according to mass percentage 3 N 4 , 0.5% MgO, 0.5% Y 2 O 3 , 0.2% Al 2 O 3 , 0.3% SiO 2 , 0.2% La 2 O 3 , 0.3% BN and mix evenly to make ceramic substrate powder;

[0111] b. Ball milling: Add the ceramic substrate powder obtained in step a to the grinding ball, solvent and adhesive and put it into the ball milling tank for wet ball milling. The time for wet ball milling is 11 hours;

[0112] c. Defoaming: defoaming the mixture after wet ball milling in step b under vacuum conditions;

[0113] d. Forming and drying: the mixture in step c is cast into a ceramic substrate with a casting machine or rolled into a ceramic substrate with a film rolling equipment, and the ceramic substrate is dried;

[0114] e. Printing: The resistive paste is printed on the surface of the ceramic substrate after dryi...

Example Embodiment

[0118] Example 3.

[0119] The preparation process of a laminated co-fired ceramic heating body of this embodiment includes the following process steps:

[0120] a. Mixing: weigh 75% of Si according to mass percentage 3 N 4 , 8% MgO, 4% Y 2 O 3 , 4% Al 2 O 3 , 3% SiO 2 , 3% La 2 O 3 , 3% BN and mix evenly to make ceramic substrate powder;

[0121] b. Ball milling: Add the ceramic substrate powder obtained in step a to the grinding ball, solvent and adhesive and put it into the ball milling tank for wet ball milling. The time for wet ball milling is 14 hours;

[0122] c. Defoaming: defoaming the mixture after wet ball milling in step b under vacuum conditions;

[0123] d. Forming and drying: the mixture in step c is cast into a ceramic substrate with a casting machine or rolled into a ceramic substrate with a film rolling equipment, and the ceramic substrate is dried;

[0124] e. Printing: The resistive paste is printed on the surface of the ceramic substrate after drying in step d throu...

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PUM

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Abstract

The invention relates to the technical field of heating member preparation and especially relates to a cofired ceramic heating member preparation technology. The cofired ceramic heating member preparation technology orderly comprises material blending, ball milling, drainage, molding and drying, printing, lamination, sintering and electrode connection. The cofired ceramic heating member preparation technology has simple processes. A blank is sintered under normal pressure in a tunnel kiln-combined reduction sintering atmosphere so that continuous production is realized, production efficiency is high, a liquid sintering method is used, a sintering temperature is low, a production cost is low and large scale production is realized.

Description

technical field [0001] The invention relates to the technical field of preparation technology of a heating body, in particular to a preparation technology of a laminated co-fired ceramic heating body. Background technique [0002] Silicon nitride heating element is a device that combines high-performance silicon nitride ceramic substrate and long-life high-power high-temperature metal heating wire. It has the characteristics of small size, high power and high thermal efficiency. Proven to be a safe and reliable way to generate heat. [0003] As a covalent bond compound, silicon nitride has a small diffusion coefficient and no melting point. It decomposes into ammonia and silicon at about 2173K, making it difficult to sinter. At present, the traditional silicon nitride ceramic heating sheet is formed by burying tungsten wire in silicon nitride powder to form a sheet-shaped body and hot-pressing and sintering. Due to the limitation of the process, the heater produced by this ...

Claims

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Application Information

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IPC IPC(8): C04B35/584C04B35/622
Inventor 陈闻杰何峰斌张明军
Owner 广东国研新材料有限公司
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