Preparing method of beryllium oxide base metal ceramic

Abstract

The invention discloses a preparing method of beryllium oxide base metal ceramic. The method comprises the following steps that firstly, nickel metal powder and beryllium oxide base ceramic powder aremixed to obtain a primary mixture; secondly, pressing forming is carried out, and a pressing blank part is obtained; thirdly, drying and heat preservation are carried out; fourthly, vacuum sinteringis carried out, and a semi-finished product is obtained; fifthly, the obtained semi-finished product is subject to grinding, finishing and drying, and the ceramic is obtained. The preparing method ofthe beryllium oxide base metal ceramic mainly solves the problems that a traditional metal ceramic heat exchange pipe is short in use period, and low in heat exchange efficiency, the heat conduction coefficient of the made beryllium oxide base metal ceramic material reaches 270.3 W / m.K, the elongation is 3.0%, the heat conduction coefficient and the elongation of the heat exchange pipe are effectively improved, and the problems existing in a traditional heat exchange pipe at present are solved.

Description

technical field [0001] The invention relates to the technical field of manufacturing high-temperature preheating furnaces, in particular to a method for preparing beryllium oxide-based cermet materials used for manufacturing heat exchange tubes of preheating furnaces. Background technique [0002] The preparation methods of nano-scale titanium dioxide mainly include physical methods and chemical methods. Physical methods mainly include sputtering methods, thermal evaporation methods and laser evaporation methods. Chemical methods mainly include liquid phase methods and gas phase methods. Liquid phase methods mainly include uniform precipitation methods and Sol-gel method, gas phase method mainly includes TiCl 4 Gas phase oxidation method, TiCl is generally used at present 4 Nano-TiO2 was prepared by gas-phase oxidation. TiCl 4 The gas phase oxidation method generally uses nitrogen as TiCl 4 Carrier gas, oxygen as an oxidant, oxidation reaction in a high-temperature tubul...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a beryllium oxide-based cermet material for the manufacture of preheating furnace heat exchange tubes in view of the above-mentioned problems, which mainly solves the problem of short service life of traditional cermet heat exchange tubes and poor heat transfer efficiency. To solve the problem of low efficiency, by compounding a beryllium oxide-based cermet material with good thermal conductivity and elongation, the preparation process is improved, and the thermal conductivity and elongation of the prepared beryllium oxide-based cermet heat exchange tube are effectively improved. , so as to solve the problems existing in the traditional heat exchange tube

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