Zirconia fiber board and preparation method

Abstract

The invention belongs to the technical field of refractory materials, and provides a zirconia fiber board and a preparation method. The zirconia fiber board comprises raw materials as follows: zirconia fibers with diameters ranging from 3 mu m to 5 mu m, hollow zirconia spheres with the granularity larger than 0.045 mm and smaller than or equal to 0.075 mm, zirconia composite micro-powder with the granularity smaller than or equal to 0.003 mm as well as a stabilizer; the zirconia fiber board further comprises small organic matter spheres with the granularity larger than 0.045 mm and smaller than or equal to 0.075 mm, organic matter micro-powder with the granularity smaller than or equal to 0.045 mm as well as a binding agent, wherein the zirconia fibers and the hollow zirconia spheres are used as base bodies; the hollow zirconia spheres and the small organic matter spheres are constructed into a three-dimensional framework structure in a zirconia fiber board green body; the zirconia composite micro-powder is used as a matrix. According to the zirconia fiber board and the preparation method, problems that zirconia fiber boards prepared with a wet method are low in strength, severe to pulverize at high temperatures and short in service life when used as thermal interface materials are solved, the cost is reduced, the efficiency is increased, the energy is saved, and the consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and relates to a lightweight heat-insulating structural material used in the fields of furnace wall hot surface material and backing material in the ultra-high temperature field, and specifically relates to a zirconia fiberboard and a preparation method. Background technique [0002] At present, the furnace wall hot surface material and external insulation layer of ultra-high temperature kilns in the market are all made of precious metal heat insulation screens. In order to achieve cost reduction, efficiency increase and energy saving There is a tendency to be replaced by ultra-high temperature refractory materials. As a representative product of ultra-high temperature refractories, zirconia products are widely used in high-temperature oxidation situations above 2300°C due to their high melting point (2715°C), high strength, excellent corrosion resistance and high-temperature oxidati...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a zirconia fiberboard and its preparation method, so that it can overcome the heavy heat insulation materials used for the hot surface material and backing material of the high-temperature kiln in the ultra-high temperature field, which have high quality, high cost, low thermal efficiency, and problems during use. The problem of poor thermal stability and easy cracking is to improve and improve the zirconia fiberboard prepared by wet method as a hot surface material with low strength, severe high-temperature pulverization and short life, so as to achieve the purpose of cost reduction, efficiency increase, energy saving and consumption reduction, and make the prepared The zirconia fiberboard has the characteristics of low bulk density, high porosity, low thermal conductivity, high structural strength and good thermal stability

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