Alkali metal salt based Sialon powder material and preparation method thereof
A technology of alkali metal salts and powder materials, applied in the field of Sialon powder materials based on alkali metal salts and its preparation, can solve problems such as difficulty in repetition, high reaction temperature, complex reaction process, etc., and achieve good toughness and oxidation resistance Good, simple method and effect
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Embodiment 1
[0028] A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is as follows: first use 60~66wt% of sodium chloride, 2~4wt% of sodium fluoride, 12~15wt% of aluminum powder, 6~8wt% of silicon powder and 13~15wt% of silicon dioxide Micropowder is used as a raw material, and 15 to 20 wt% of sodium azide is added to the raw material, and the mixture is uniformly mixed to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 1200-1300°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.
[0029] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, me...
Embodiment 2
[0031] A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is: firstly use 60~66wt% sodium chloride, 4~6wt% sodium fluoride, 12~15wt% aluminum powder, 6~8wt% silicon powder and 10~13wt% silicon dioxide Micropowder is used as a raw material, and 10 to 15 wt% of sodium azide is added to the raw material, and the mixture is uniformly mixed to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 1300-1400°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.
[0032] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, measured under atmospheric...
Embodiment 3
[0034]A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is: first use 60~66wt% of magnesium chloride, 4~6wt% of sodium fluoride, 12~15wt% of aluminum powder, 5~6wt% of silicon powder and 13~15wt% of silicon dioxide micropowder as Raw materials, plus 15-20 wt% of sodium azide of the raw materials, mixed evenly to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, and react in a nitrogen atmosphere at 1200-1300°C for 2.5-3.5 hours. Cool to room temperature and remove the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.
[0035] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, measured under atmospheric conditions: the normal ...
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