Preparation method of grain boundary layer type structure ceramic membrane
A technology of ceramic film and grain boundary layer is applied in the field of preparation of grain boundary layer type structure ceramic film, which can solve the problems of complex preparation process of grain boundary layer type structure, high preparation cost, difficult process control, etc., and avoid oxygen diffusion rate. Too fast, evenly distributed, tightly combined effect
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Embodiment 1
[0028] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:
[0029] The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve ammonia water with a mass concentration of 25% that is 5 times the volume of orthosilicate in d volume parts of anhydrous ethanol. Water and ethanol are configured into solution D, c:d=1:1, then, solution C is placed in a magnetic stirring device, and solution D is added in solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.6mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;
[0030] In the second step, first add deionized water to the round bottom flask, and after blowing nitrogen, add styrene, control the concentration of styrene to 5mol / L, continue to blow nitrogen a...
Embodiment 2
[0037] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:
[0038]The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve an equal volume of tetraethyl orthosilicate in ammonia water with a mass concentration of 28% in d volume parts of anhydrous Ethanol is configured into solution D, c:d=1:1, then, solution C is placed in a magnetic stirring device, solution D is added to solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.5 mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 60°C to obtain SiO 2 Nano or submicron spheres;
[0039] In the second step, add deionized water to the round bottom flask first, and then add styrene to control the concentration of styrene to 2mol / L, continue to pass nitrogen and keep the temperature at 80°C, and t...
Embodiment 3
[0046] The preparation method of the grain boundary layer structure ceramic membrane comprises the following steps:
[0047] The first step is to dissolve ethyl orthosilicate in c volume parts of absolute ethanol to configure solution C, and then dissolve ammonia water with a mass concentration of 25% twice the volume of tetraethyl orthosilicate in d volume parts of anhydrous ethanol Water and ethanol are configured into solution D, c:d=1:2, then, solution C is placed in a magnetic stirring device, and solution D is added in solution C under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.6mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;
[0048] In the second step, first add deionized water to the round bottom flask, and after blowing nitrogen, add styrene, control the concentration of styrene to 2mol / L, continue to blow nitrogen a...
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