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Preparation method of silicon carbide ceramic kiln furniture coated with yttria-stabilized zirconia coating

A technology of yttrium-stabilized zirconia and silicon carbide ceramics, which is applied in the field of preparation of silicon carbide ceramic kiln furniture, to achieve the effects of improving oxidation resistance, service life and high temperature resistance

Active Publication Date: 2016-03-23
ANJI KELING MAGNETIC MATERIAL
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Problems solved by technology

[0005] However, at present, there is no relevant report on the preparation of oxidation-resistant silicon carbide ceramic kiln furniture with yttrium-stabilized zirconia sol as the surface coating material.

Method used

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Embodiment 1

[0025] Example 1. A method for preparing silicon carbide ceramic kiln furniture coated with a yttrium-stabilized zirconia coating (ie, a method for coating silicon carbide ceramic kiln furniture with a yttrium-stabilized zirconia coating on the surface The surface is coated with a layer of yttrium stabilized zirconia coating), the process steps are as follows:

[0026] 1) Silicon carbide particles with a particle size of 1~2mm, silicon micropowder with an average particle size of 0.5μm, and starch are mixed in a mass ratio of 87:10:3 and then wet-mixed in a mixer for 2 hours. The mixture is trapped for 24 hours and then formed (Molding pressure 160MPa) is made into a silicon carbide body, which is dried in an environment of about 50°C for 6 hours; a silicon carbide ceramic kiln furniture blank (15 cm × 15 cm × 2 cm sheet) is obtained.

[0027] 2). Spray the yttrium stabilized zirconia sol uniformly on the surface of the kiln furniture (ie, the silicon carbide ceramic kiln furniture...

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Abstract

The invention discloses a preparation method of silicon carbide ceramic kiln furniture coated with an yttria-stabilized zirconia coating. The method comprises the following steps that 1, a silicon carbide ceramic kiln furniture blank is evenly coated with yttria-stabilized zirconia sol in a spraying mode, so that the coating is formed, and after natural drying is performed for 2-3 h, drying is performed at the temperature of 45-55 DEG C for 5-7 h, wherein the yttria-stabilized zirconia sol is the zirconium dioxide sol containing 3 mol% yttrium and is obtained through a sol-gel method; 2, the product obtained in the first step is fired at the temperature of 1450-1500 DEG C for 72-96 h, and the silicon carbide ceramic kiln furniture coated with the yttria-stabilized zirconia coating is obtained. By adopting the method, the oxidation resistance and high temperature resistance of the silicon carbide ceramic kiln furniture can be improved.

Description

Technical field [0001] The invention relates to a method for preparing silicon carbide ceramic kiln furniture, in particular to a method for preparing oxidation-resistant silicon carbide ceramic kiln furniture with a yttrium stabilized zirconia coating on the surface. Background technique [0002] Silicon carbide ceramics have high flexural strength, superior corrosion resistance, high wear resistance and low friction coefficient, high temperature mechanical properties (strength, creep resistance, etc.), and are used in petroleum, chemical, microelectronics, automotive, aerospace , Aviation, papermaking, laser, mining and atomic energy have been widely used in industrial fields. In the past ten years, silicon carbide ceramics, as an advanced high-temperature ceramic kiln furniture, is gradually being used in kilns in various industrial fields, especially rapid firing kilns. As a refractory material, the quality of high-temperature kiln furniture has a direct impact on the qualit...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/009C04B41/5042C04B41/87C04B35/565C04B41/4543C04B41/4537C04B41/0072
Inventor 郭兴忠宋杰刘大明徐生富杨辉
Owner ANJI KELING MAGNETIC MATERIAL
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