Preparation method of compound refractory kiln furniture

Abstract

The invention discloses a preparation method of compound refractory kiln furniture. In the preparation method, firstly, a kiln furniture main body is selected; surface pretreatment is carried out on the surface of the kiln furniture main body to cause the surface to have certain adsorption activity; a negative-pressure dipping method is adopted to evenly adsorb stable zirconia slurry prepared in advance to the surface of the kiln furniture main body and fill into the air holes or microcracks of the kiln furniture main body; and the obtained product is dried and sintered at high temperature to obtain the compound refractory kiln furniture of the invention. The compound kiln produced by the invention has the advantages of low cost, even coating, good integrity, small possibility of deforming, low volatility and the like. The manufacturing method is also scientific and reasonable, is easy to popularize and apply, etc.

Description

technical field [0001] The invention belongs to the technical field of refractory material preparation, and in particular relates to a method for preparing composite refractory kiln furniture for firing electronic ceramics. Background technique [0002] During the firing process of electronic ceramics, in order to obtain a good appearance of the product, prevent sintering deformation, and avoid adverse reactions between electronic ceramics and kiln furniture used during high-temperature sintering, high temperature resistance, low volatility, and Zirconia refractories with strong inertness, the use methods of zirconia refractories usually include the following: (1) making pure zirconia kiln furniture as a whole; (2) using corundum-mullite, mullite-cordierite , corundum-cordierite, etc. as the main body of kiln furniture, and then spray or smear zirconia coating on its surface; (3) use corundum, corundum-mullite, corundum-cordierite, etc. Zirconium isolation sand or zirconia ...

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Problems solved by technology

[0003] In the process of use, it is found that there are certain defects in the use of the above three zirconia refractory materials. Method (1): The pure zirconia kiln furniture has problems such as heavy weight, large heat storage, high raw material cost, and difficult sintering; method (2): There are problems such as poor uniformity of the zirconia coating and poor bonding between the coating and the main body of the kiln furniture. During use, the zirconia coating is easy to powder, layered, peeled and peeled off, which in turn causes partial damage to the electronic ceramic products. Pollution; method (3): Zirconia isolation sand or zirconia isolation powder is not easy to spread evenly, and the use process is prone to dislocation and movement due to the sintering problem of isolation sand and isolation powder itself, resulting in sintering deformation of electronic ceramic products, and zirconia isolation Sand or zirconia spacer powder is easily polluted after repeated use, which will affect the quality and performance of electronic ceramic products