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Zirconia coating layer for saggar and preparation method of saggar

A technology of zirconia and fused zirconia, which is applied in the field of refractory materials, can solve problems such as erosion, low service life, and high production cost, and achieve the effects of convenient use, stable quality, and low cost

Inactive Publication Date: 2017-02-22
无锡顺佳特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Low service life
2. Use zirconia sand: (1) Zirconia sand is easily eroded by the mullite of the sagger substrate, and must be replaced after a period of use, resulting in high production costs
(2) Zirconia sand is not easy to evenly cover the bottom plate, and the ferrite soft magnet in the exposed part is easily polluted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A zirconia coating for saggers, consisting of the following components in parts by mass: 4 parts of 60 mesh fused zirconia, 1 part of 100 mesh fused zirconia, 1 part of 200 mesh fused zirconia, Sodium phosphate 0.1 part, polyvinyl alcohol 0.1 part, water 1 part. Then put the mixture into the mixer and mix for 1 hour at a speed of 120 rpm; then use a brush to coat the inner surface of the sintered mullite sagger with a layer of mixture, or pour the mixture into the sagger , vibrate the sagger to make it evenly coated on the inner surface of the sagger; let the treated sagger stand to dry naturally for 12 hours, put it in a drying room for 24 hours at 110°C; continue to put the sagger into a high-temperature kiln It was fired at 1550°C for 3 hours; after the saggers came out of the kiln, they were left to cool down, and then sorted and put into storage after reaching room temperature.

Embodiment 2

[0021] A zirconia coating for saggers, consisting of the following components in parts by mass: 5 parts of fused zirconia of 60 mesh, 3 parts of fused zirconia of 100 mesh, 2 parts of fused zirconia of 200 mesh, six parts 0.3 parts of sodium phosphate, 0.2 parts of polyvinyl alcohol, and 1.5 parts of water. Then put the mixture into the mixer and mix for 3 hours at a speed of 120 rpm; then use a brush to coat the inner surface of the sintered mullite sagger with a layer of mixture, or pour the mixture into the sagger , vibrate the sagger to make it evenly coated on the inner surface of the sagger; let the treated sagger stand to dry naturally for 12 hours, put it in a drying room for 24 hours at 110°C; continue to put the sagger into a high-temperature kiln It was fired at 1550°C for 3 hours; after the saggers came out of the kiln, they were left to cool down, and then sorted and put into storage after reaching room temperature.

Embodiment 3

[0023] A zirconia coating for saggers, consisting of the following components in parts by mass: 6 parts of fused zirconia of 60 mesh, 4 parts of fused zirconia of 100 mesh, 3 parts of fused zirconia of 200 mesh, 0.5 parts of sodium phosphate, 0.5 parts of polyvinyl alcohol, 5 parts of water. Then put the mixture into the mixer and mix for 1.5 hours at a speed of 120 rpm; then use a brush to coat the inner surface of the sintered mullite sagger with a layer of mixture, or pour the mixture into the sagger , vibrate the sagger to make it evenly coated on the inner surface of the sagger; let the treated sagger stand to dry naturally for 12 hours, put it in a drying room for 24 hours at 110°C; continue to put the sagger into a high-temperature kiln Fired at 1450°C for 3 hours; after the saggers are out of the kiln, let them stand to cool down, and then sort them into storage after reaching room temperature.

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PUM

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Abstract

The invention discloses a zirconia coating layer for a saggar; the zirconia coating layer includes the following components in parts by mass: 4-6 parts of 60-mesh fused zirconia, 1-4 parts of 100-mesh fused zirconia, 1-3 parts of 200-mesh fused zirconia, 0.1-0.5 part of sodium hexametaphosphate, 0.1-0.5 part of polyvinyl alcohol, and 1-5 parts of water. At the same time, the invention also discloses a preparation method of the zirconia coating layer saggar. The product has the advantages of low cost, stable quality and long service life, and is more convenient to use than a traditional product.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a zirconia coating for a sagger and a preparation method of the sagger. Background technique [0002] The firing temperature of ferrite soft magnet materials is generally between 1100°C and 1450°C. In order to prevent the product from scattering, the firing of ferrite soft magnets generally uses mullite sagger as a carrier, but the iron in ferrite soft magnets , nickel, manganese and other components are easy to react with alumina and silicon oxide in the material of the sagger, causing product pollution and damaging the performance of the product. Most manufacturers adopt a layer of zirconia plate with a thickness of about 4mm in the sagger (zirconia does not react with ferrite soft magnets) or evenly sprinkle a layer of zirconia sand to isolate the product from contact with the mullite sagger . [0003] With the development of technology and the limitation of m...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/48C04B41/87
Inventor 邵顺芳朱义文
Owner 无锡顺佳特种陶瓷有限公司
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