Preparation method of composite ceramic material for thermal protection connection
A composite ceramic and thermal protection technology, applied in the field of ceramic materials, can solve problems such as poor reliability, and achieve the effects of good self-lubrication, good hardness and bearing capacity, and low diffusion coefficient
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Embodiment 1
[0037] In terms of parts by weight, weigh 30 parts of silicon dioxide powder and 60 parts of carbon powder respectively, place the silicon dioxide powder and carbon powder in a mixer, and stir at a speed of 180r / min for 20min at room temperature to obtain a mixed powder. The powder is placed in a tube-type atmosphere furnace, nitrogen gas is introduced at a flow rate of 100mL / min, and the temperature is raised from room temperature to 1500°C under a power of 8kW, kept for calcination for 1h, and cooled to room temperature with the furnace to obtain a reaction powder. In a muffle furnace, raise the temperature from room temperature to 600°C at a rate of 5°C / min, heat-preserve and calcinate for 40 minutes, and cool to room temperature with the furnace to obtain silicon nitride powder; then weigh 40 parts by weight of oxygen Zirconium chloride, 48 parts of ethyl orthosilicate, 16 parts of ammonia water with a mass concentration of 1%, 240 parts of deionized water, zirconium oxychl...
Embodiment 2
[0039] In terms of parts by weight, weigh 35 parts of silicon dioxide powder and 70 parts of carbon powder respectively, place the silicon dioxide powder and carbon powder in a mixer, and stir for 25 minutes at a speed of 190 r / min at room temperature to obtain a mixed powder. The powder is placed in a tube-type atmosphere furnace, nitrogen gas is introduced at a gas flow rate of 110mL / min, the temperature is raised from room temperature to 1550°C under the power of 9kW, heat preservation and calcination is carried out for 1h, and the reaction powder is obtained by cooling to room temperature with the furnace. In a muffle furnace, raise the temperature from room temperature to 700°C at a rate of 5°C / min, keep the temperature for calcination for 50 minutes, and cool down to room temperature with the furnace to obtain silicon nitride powder; then weigh 45 parts of oxygen by weight. Zirconium chloride, 54 parts of ethyl orthosilicate, 18 parts of ammonia water with a mass concentr...
Embodiment 3
[0041] In terms of parts by weight, weigh 40 parts of silicon dioxide powder and 80 parts of carbon powder respectively, put the silicon dioxide powder and carbon powder in a mixer, and stir at a speed of 200r / min for 30min at room temperature to obtain a mixed powder. The powder is placed in a tubular atmosphere furnace, fed with nitrogen gas at a gas flow rate of 120mL / min, raised from room temperature to 1600°C under a power of 10kW, kept for calcination for 2 hours, and cooled to room temperature with the furnace to obtain a reaction powder, which is placed in a In a muffle furnace, raise the temperature from room temperature to 800°C at a rate of 5°C / min, heat-preserve and calcinate for 60 minutes, and cool down to room temperature with the furnace to obtain silicon nitride powder; then weigh 50 parts by weight of oxygen Zirconium chloride, 60 parts of ethyl orthosilicate, 20 parts of ammonia water with a mass concentration of 1%, 300 parts of deionized water, zirconium ox...
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