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
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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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