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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. It can solve the problems of weakly sprayed setter plates, deformed coating bonding force, and substrate cracking, etc., and achieves long service life, enhanced adhesion, and anti-corrosion Strong peeling effect

Active Publication Date: 2015-07-08
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 setter for the above-mentioned sintering kiln comprises the following steps:

[0026] (1) To make the green body of the matrix, weigh each component according to the formula of the matrix, put them into the mixer and mix them evenly, mold them into shape, dry and calcinate. Preferably, before compression molding, the mixed powder is sealed and allowed to stand for 12 to 36 hours to trap the powder. Preferably, the drying is that the molded green body is dried in an environment of 40-60° C. for 10-15 hours. Preferably, the calcination is based on 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 the air spray gun, spray it out at a pressure of 0.1-0.2MPa, and carry out surface roughening treatment on the calcined green body...

Embodiment 1

[0036] The setter of this embodiment includes a substrate, a transition layer and a sprayed surface layer that are sequentially covered from the inside to the outside. The formula used for the matrix is: 30% andalusite, 31% corundum particles, 30% alumina micropowder, 8% kaolin, and 1% binder polyvinyl alcohol. The composition of the transition layer is: 30% alumina, 70% yttrium stabilized zirconium. The composition of the sprayed surface layer is: 100% yttrium stabilized zirconium. Among them, the particle size of andalusite≦0.5mm contains 56% Al by weight percentage 2 o 3 , 37% SiO 2 ; Corundum particle size ≦ 0.5mm, its main crystal phase is a-Al 2 o 3 , Al 2 o 3 ≧99%; kaolin D50≦5um, containing 55% Al by weight percentage 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% of Y 2 o 3 .

[0037] The preparation includes the f...

Embodiment 2

[0042] The setter of this embodiment includes a substrate, a transition layer and a sprayed surface layer that are sequentially covered from the inside to the outside. The formula used for the matrix is: 35% andalusite, 26% corundum particles, 30% alumina micropowder, 8% kaolin, and 1% binder polyvinyl alcohol. The composition of the spray 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 in Example 1.

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

[0045] After testing experiments, the finished setter plates for sintering prepared in Examples 1 and 2 of the present invention have good thermal shock resistance, high temperature creep resistance, strong coating resistance to peeling, and long service life. The main performance indicators are as follows:

[0046] performance

indi...

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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 a furnace material, in particular to a method for preparing a setter plate for a sintered kiln. Background technique [0002] Zirconia setter is an important carrier for capacitors. Modern society has entered the information age, the electronics industry is developing rapidly around the world, and the application fields of electronic products are expanding rapidly. As one of the components of electronic products, the use of MLCC is growing rapidly. According to statistics, the use of MLCC in the world is increasing by 10-15% per year, and the annual consumption of MLCC sintering setters is also increasing year by year. [0003] Chinese patent CN101121607A discloses a preparation method of a spray-coated setter plate with an intermediate layer. The production process is to first spray a high-purity alumina transition layer and a zirconia layer on the blank of the substrate, and then spray the high-puri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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