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Dry-point silicon nitride electric heating element and manufacturing method thereof

A silicon nitride electric and heating element technology, applied in the direction of heating element materials, etc., can solve the problems of poor corrosion resistance, low safety and reliability, and short service life, and achieve good wear resistance, excellent wear resistance, Good thermal effect

Active Publication Date: 2014-07-02
广州石潮特种陶瓷制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electric heating elements heated in the air field at home and abroad are heated by resistance wires, metal tubes, silicon carbon materials, PTC and coatings. They all have a common disadvantage: short service life, low safety and reliability, and corrosion resistance. Poor, and resistance wire, metal tube, PTC cannot be used in high temperature environment

Method used

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  • Dry-point silicon nitride electric heating element and manufacturing method thereof
  • Dry-point silicon nitride electric heating element and manufacturing method thereof
  • Dry-point silicon nitride electric heating element and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The sintering process of the biscuit prepared by formula I is as follows: heat the graphite mold at room temperature to 1015°C within 35 minutes, continue to heat up and start to pressurize, heat the graphite mold to 1780°C again within 90 minutes, and accelerate at an even speed. Press to 29 砘, (single-layer firing 10 pieces) and keep it for 10 minutes, then cool the graphite mold to 1750°C within 5 minutes, raise it to 1760°C within 5 minutes and keep it for 35 minutes, turn off the machine and let it cool down naturally, and release the pressure.

Embodiment 2

[0036] The sintering process of the biscuit prepared by formula II is as follows: heat the graphite mold at room temperature to 1000°C within 40 minutes, continue to heat up and start to pressurize, heat the graphite mold to 1785°C again within 70 minutes, and accelerate at an even speed. Press to 29 砘, (single-layer firing 10 pieces) and keep it for 8 minutes, then cool the graphite mold to 1680°C within 5 minutes, raise it to 1760°C in 10 minutes and keep it for 40 minutes, turn off the machine and let it cool down naturally, and release the pressure.

Embodiment 3

[0038] The sintering process of the biscuit prepared by formula III is as follows: heat the graphite mold at room temperature to 1015°C within 30 minutes, continue to heat up and start to pressurize, heat the graphite mold to 1750°C again within 85 minutes, and accelerate at an even speed. Press to 29 砘, (single-layer firing 10 pieces) and keep it for 4 minutes, then cool the graphite mold to 1730°C within 5 minutes, raise it to 1760°C in 7 minutes and keep it for 20 minutes, turn off the machine and let it cool down naturally, and release the pressure.

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Abstract

The invention discloses a dry-point silicon nitride electric heating element and a manufacturing method. The dry-point silicon nitride electric heating element consists of a heating source and a heating body. The heating body comprises the following components: by weight percentage, 85-96% of nanometer silicon nitride, 1-4% of aluminum oxide and 4-8% of yttria, and is formed by preparing the components, making biscuit and sintering and the like. The dry-point silicon nitride electric heating element is resistant to high temperature and corrosion and excellent in thermohardening and wear resistance and can work for long time at the temperature within 1200 DEG C.

Description

technical field [0001] The invention relates to an electric heating material, in particular to a dry-point silicon nitride electric heating element and a manufacturing method thereof. Background technique [0002] At present, the electric heating elements heated in the air field at home and abroad are heated by resistance wires, metal tubes, silicon carbon materials, PTC and coatings. They all have a common disadvantage: short service life, low safety and reliability, and corrosion resistance. Poor, and resistance wire, metal pipe, PTC cannot be used in high temperature environment. Contents of the invention [0003] In order to solve the above-mentioned technical deficiencies, the object of the present invention is to provide a dry-point silicon nitride electric heating element, which is corrosion-resistant, high-temperature resistant, long-life, safe and reliable. [0004] Another object of the present invention is to provide a method for manufacturing the above-mention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/10
Inventor 陈凌
Owner 广州石潮特种陶瓷制造有限公司
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