Ultrafine zirconia/sic composite long fiber and its preparation method and application
A long fiber and reaction technology, applied in the field of ultrafine ZrO2/SiC composite long fiber and its preparation, can solve the problems of poor oxidation resistance, cannot exceed 500 ℃, mismatched thermophysical properties, etc., and achieves simple process and comprehensive performance. Good results
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Embodiment 1
[0015] Embodiment 1 proposes a kind of ultrafine ZrO 2 The preparation method of / SiC composite long fiber, comprises the steps:
[0016] (1) first drop glycerol and trimethylmonochlorosilane in dimethyldichlorosilane under stirring, then add reaction metal and xylene, then heat until the reaction metal melts into a liquid state and stir until The solution turns purple until the purple is no longer deep, then lower the temperature to room temperature, then cool and filter, wash with alcohol, dry and grind into powder; among them, dimethyldichlorosilane, glycerol and trimethylchlorosilane The mass ratio is 10:2:1; the reaction metal is 7% of the total mass of the reactants, and the xylene is 8% of the total volume of the reactants. The reactive metal is magnesium.
[0017] (2) Add the powder into the reaction device and fill it with protective gas, then heat it to 160°C and keep it warm for 5 hours, then add phenol and formaldehyde to obtain methylphenol; wherein, the volume r...
Embodiment 2
[0021] Embodiment 2 proposes a kind of ultrafine ZrO 2 The preparation method of / SiC composite long fiber, comprises the steps:
[0022] (1) first drop glycerol and trimethylmonochlorosilane in dimethyldichlorosilane under stirring, then add reaction metal and xylene, then heat until the reaction metal melts into a liquid state and stir until The solution turns purple until the purple is no longer deep, then lower the temperature to room temperature, then cool and filter, wash with alcohol, dry and grind into powder; among them, dimethyldichlorosilane, glycerol and trimethylchlorosilane The mass ratio is 10:2:1; the reaction metal is 13% of the total mass of the reactants, and xylene is 5% of the total volume of the reactants. The reactive metal is sodium.
[0023] (2) Add the powder into the reaction device and fill it with protective gas, then heat it to 220°C and keep it warm for 3 hours, then add phenol and formaldehyde to obtain methylphenol; wherein, the volume ratio o...
Embodiment 3
[0027] Embodiment 3 proposes a kind of ultrafine ZrO 2 The preparation method of / SiC composite long fiber, comprises the steps:
[0028] (1) first drop glycerol and trimethylmonochlorosilane in dimethyldichlorosilane under stirring, then add reaction metal and xylene, then heat until the reaction metal melts into a liquid state and stir until The solution turns purple until the purple is no longer deep, then lower the temperature to room temperature, then cool and filter, wash with alcohol, dry and grind into powder; among them, dimethyldichlorosilane, glycerol and trimethylchlorosilane The mass ratio is 10:2:1; the reaction metal is 10% of the total mass of the reactants, and xylene is 7% of the total volume of the reactants. The reactive metal is potassium.
[0029] (2) Add the powder into the reaction device and fill it with protective gas, then heat it to 190°C and keep it warm for 4 hours, then add phenol and formaldehyde to obtain methylphenol; wherein, the volume rati...
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