Preparing method of beryllium oxide base metal ceramic

A beryllium oxide and base metal technology is applied in the field of preparation of beryllium oxide-based cermet materials, which can solve the problems of low heat exchange efficiency and short service period, and achieve the effects of improving thermal conductivity and elongation and improving the preparation process.

Inactive Publication Date: 2018-03-27
朱森
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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 prob

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  • Preparing method of beryllium oxide base metal ceramic
  • Preparing method of beryllium oxide base metal ceramic

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[0025] Further, in the present invention, the preparation method of beryllium oxide-based ceramic powder includes the following steps:

[0026] Step 1. Prepare the blank by using the existing technology, then evenly coat the glaze on the surface of the blank, and then fire it into a fired body at 1250°C;

[0027] Step 2. Crush the fired preform together with zinc oxide into a powder with an average particle size of less than 50μm to obtain ceramic powder, where the mass of zinc oxide added is not higher than 2.5% of the fired body mass fraction .

[0028] The present invention also includes a preparation method of beryllium oxide-based cermet material, including the following steps:

[0029] Step 1. Take the designed amount of beryllium oxide-based metal powder and ceramic powder and place them in a high-speed ball mill for mixing and grinding for 2-4 hours. The speed of the high-speed ball mill is 400 rad / min, and then mix them evenly in a high-speed mixer to obtain a primary mixture...

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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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Application Information

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IPC IPC(8): C22C29/12C22C1/05
CPCC22C29/12B22F2998/10C22C1/05C22C29/005B22F1/0003B22F3/02B22F3/1007
Inventor 朱森
Owner 朱森
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