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Sintering bearing plate for sintering kiln, and preparation method of sintering bearing plate

A technology for sintering kilns and setter plates, which is applied in the field of furnace material manufacturing, which can solve the problems of deformed coating binding force, weak spraying setter plates, and substrate cracking, and achieve enhanced adhesion, long service life, and anti-corrosion Strong peeling effect

Active Publication Date: 2014-04-16
广东羚光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem of premature failure of the sprayed setter plate in the prior art due to substrate cracking, deformation, or weak peeling of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the above-mentioned setter plate for sintering kiln comprises the following steps:

[0026] (1) To make the green body of the base body, weigh the components according to the formula of the base body, put them into a mixer and mix them evenly, press molding, dry and calcine. Preferably, before molding, the mixed powder is sealed and left for 12 to 36 hours to trap the material. Preferably, the drying is that the formed china is placed in an environment of 40-60° C. to dry for 10-15 hours. Preferably, the calcination is calcined according to a calcination system with a maximum temperature of 1400-1600° C. for 4-6 hours.

[0027] (2) Surface roughening treatment, the fired green body is subjected to surface roughening treatment. The surface roughening treatment is to use 40-60 mesh alumina sand, put it into an air spray gun, and spray it at a pressure of 0.1-0.2 MPa, and perform surface roughening treatment on the calcined green body.

[0028]...

Embodiment 1

[0036] The setter plate of this embodiment includes a matrix, a transition layer and a sprayed surface layer sequentially covered from the inside to the outside. The formula used for the matrix is: andalusite 30%, corundum particles 31%, alumina micropowder 30%, kaolin 8%, and binder polyvinyl alcohol 1%. The composition of the transition layer is: alumina 30%, yttrium stabilized zirconium 70%. The composition of the sprayed surface layer is: 100% yttrium stabilized zirconium. Among them, the particle size of andalusite is less than or equal to 0.5mm, and it contains 56% Al by weight percentage 2 O 3 , 37% SiO 2 ; The particle size of corundum is less than or equal to 0.5mm, and its main crystal phase is a-Al 2 O 3 , Al 2 O 3 ≧99%; Kaolin D50≦5um, including 55% Al by weight 2 O 3 , 36% SiO 2 ; Alumina adopts alumina powder with D50≦5um; the particle size of yttrium-stabilized zirconia is 180 mesh to 250 mesh, which contains 93% ZrO by weight percentage 2 , 7% Y 2 O...

Embodiment 2

[0042] The setter plate of this embodiment includes a matrix, a transition layer and a sprayed surface layer sequentially covered from the inside to the outside. The formula used in the matrix is: andalusite 35%, corundum particles 26%, alumina micropowder 30%, kaolin 8%, and binder polyvinyl alcohol 1%. The composition of the sprayed transition layer is: alumina powder 40%, yttrium-stabilized zirconium powder 60%. The composition of the sprayed surface layer is: 100% yttrium-stabilized zirconium powder.

[0043] The selected materials are the same as those in Example 1.

[0044] The preparation process is the same as in Example 1.

[0045] Through test experiments, the finished setter plate products for sintering prepared in Examples 1 and 2 of the present invention have good thermal shock resistance, strong high temperature creep resistance, strong coating resistance to spalling, and long service life, and the main performance indicators are as follows:

[0046] ...

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Abstract

The invention discloses a sintering bearing plate for a sintering kiln, and a preparation method of the sintering bearing plate. The sintering bearing plate structurally comprises a substrate, a transition layer covering the surface of the substrate, and a spraying surface layer covering the surface of the transition layer, wherein the substrate comprises the following components by weight percentage: 20-30% of andalusite, 30-45% of corundum, 20-30% of alumina micropowder, 5-10% of kaoline and 1-2% of binding agent; the transition layer comprises the following components by weight percentage: 60-80% of yttria-stabilized zirconia and 20-40% of alumina; and the spraying surface layer is yttria-stabilized zirconia. According to the sintering bearing plate for the sintering kiln, a material of the substrate is adjusted and the transition layer is sprayed before the surface layer and the substrate are sprayed, so that the adhesion between the material layers is improved obviously, and each thermal expansion coefficient is approximate; and compared with the existing sintering bearing plate, the sintering bearing plate has the advantages of good thermal shock resistance, high high-temperature creep resistance, high coating stripping resistance, long service life and the like.

Description

technical field [0001] The invention relates to a method for manufacturing furnace materials, in particular to a method for preparing a setter plate for a sintering kiln. Background technique [0002] Zirconia setter plate is an important carrier for capacitor setter. Modern society has entered the information age, the electronics industry is developing rapidly around the world, and the application field of electronic products is rapidly expanding. As one of the electronic product components, the usage of MLCC is growing rapidly. According to statistics, the usage of MLCC in the world is increasing by 10-15% every year, and the annual consumption of MLCC sintering setter plate is also increasing year by year. [0003] Chinese patent CN101121607A discloses a method for preparing a sprayed setter with an intermediate layer. Calcination binds the coating to the green body. The setter produced by this method has the disadvantages of too thick coating and low bonding strength b...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 谭汝泉宋先刚彭文娄红涛刘名惠邱衍嵩冯震乾
Owner 广东羚光新材料股份有限公司
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