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Nitride bonded sandwich load bearing board and preparation method thereof

A technology of sandwich and setter plates, applied in the field of refractory materials, can solve problems such as low flexural strength, breakage of setter plates, kiln accidents, etc., achieve good thermal shock stability, not easy to break, and avoid reactions

Inactive Publication Date: 2017-11-03
宜兴市锦泰耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the defect of low flexural strength at high temperature during use, it is often easy to cause the setter plate to break, resulting in kiln accidents and economic losses

Method used

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  • Nitride bonded sandwich load bearing board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Mullite fabric: Take 50 parts of mullite with a coarse particle size of 0.2-1mm, about 30 parts of 200 mesh mullite fine powder, 15 parts of 325 mesh mullite and 5 parts of clay into the wheel mill Stir in the middle for 10 minutes, then add 0.5 parts of CMC and 5 parts of water for wet grinding, and then put it into a stainless steel bucket for aging;

[0031] Silicon nitride combined with silicon carbide black material: take 15 parts of 325 mesh silicon carbide fine powder, 3 parts of silicon carbide superfine powder, 2 parts of clay and 10 parts of metal silicon powder 325 mesh into the double cone mixer, add Zirconia grinding balls for fine powder pre-mixing with a mixing time of 30 minutes. Then take 20 parts of silicon carbide with a coarse particle size of 1-3mm, and 50 parts of 0.5-1mm, put them into the wheel mill and stir for 10 minutes, add 3 parts of water and 1 part of yellow dextrin solution with a concentration of 20 parts.

[0032] Mix for another 1...

Embodiment 2

[0041] The steps are basically the same as in Example 1, the difference being:

[0042] Mullite fabric: Take 40 parts of mullite with a coarse particle size of 0.2-1mm, about 35 parts of 200 mesh mullite fine powder, 20 parts of 325 mesh mullite and 5 parts of clay.

[0043] Silicon nitride combined with silicon carbide black material: take 15 parts of 325 mesh silicon carbide fine powder, 3 parts of silicon carbide superfine powder, 2 parts of clay and 10 parts of metal silicon powder 200 mesh for fine powder pre-mixing, the mixing time is 30 minute. Then take 25 parts of silicon carbide with a coarse particle size of 1-3 mm, and 45 parts of 0.5-1 mm.

[0044] The maximum temperature is 1400°C, and the temperature is kept for 4 hours.

Embodiment 3

[0046] The steps are basically the same as in Example 1, the difference being:

[0047] Mullite fabric: Take 40 parts of mullite with a coarse particle size of 0.2-1mm, about 35 parts of 200 mesh mullite fine powder, 20 parts of 325 mesh mullite and 5 parts of clay.

[0048] Silicon nitride combined with silicon carbide black material: take 10 parts of 325 mesh silicon carbide fine powder, 3 parts of silicon carbide superfine powder, 2 parts of clay and 15 parts of metal silicon powder 200 mesh for fine powder pre-mixing, the mixing time is 30 minute. Then take 25 parts of silicon carbide with a coarse particle size of 1-3 mm, and 45 parts of 0.5-1 mm.

[0049] The highest temperature is 1420°C, keep warm for 3 hours.

[0050] The comparison of the setter physical properties obtained by the above examples is shown in Table 1:

[0051] Table 1 Physical performance test table of setter plate

[0052]

[0053] The present invention proposes to use nitride combined with silic...

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Abstract

The invention relates to a nitride bonded sandwich load bearing board and a preparation method thereof, and belongs to the technical field of fireproof materials. The nitride bonded sandwich load bearing board comprises a mullite surface protection layer and a silicon nitride bonded silicon carbide middle layer, wherein the mullite surface protection layer is prepared from the following raw materials: mullite of which the coarseness is 0.2 to 1mm, mullite fine powder of which the particle size is 200 meshes, mullite of which the density is 325 meshes, clay and an organic bonding agent; the silicon nitride bonded silicon carbide middle layer is prepared from silicon carbide of which the coarseness is 1 to 3mm, silicon carbide of which the coarseness is 0.5 to 1, silicon carbide fine powder of which the coarsness is 0.5 to 1mm and the particle size is 325 meshes, silicon carbide ultrafine powder, the clay, metal silicon powder of which the particle size is 325 meshes and the organic bonding agent. According to the nitride bonded sandwich load bearing board disclosed by the invention, silicon nitride bonded silicon carbide is adopted as the middle layer, the high temperature bending strength of the silicon nitride bonded silicon carbide is high and is not reduced but increased under a high temperature, reaction between a magnetic material and the load bearing board is avoided during sintering of the magnetic material, and the service life of the load bearing board is indirectly prolonged.

Description

technical field [0001] The invention relates to a nitride-bonded sandwich setter and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Sandwich setter is a kind of refractory setter widely used in magnetic materials industry for sintering. Generally, it has a structure with oxide-bonded silicon carbide as the middle layer and mullite or corundum as the surface protection layer. The conventional firing temperature of magnetic materials is between 1350°C and 1450°C, with a nitrogen protective atmosphere. At the same time, since the magnetic materials contain iron, manganese, zinc and other metal elements, they are easy to react with the oxide-bonded silicon carbide sandwich setter, resulting in Magnetic material pollution, electrical performance decline and other consequences. In addition, at present, the maximum size of oxide-bonded silicon carbide sandwich setters that can be mass-produced by domestic and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/565C04B35/622C04B35/584C04B35/65C04B38/00F27D5/00
CPCC04B35/185C04B35/565C04B35/591C04B35/622C04B38/00C04B2235/349C04B2235/424C04B2235/46C04B2235/77C04B2235/96F27D5/00C04B38/0074
Inventor 姜涛陈秀文
Owner 宜兴市锦泰耐火材料有限公司
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