Al2O3 intercalated expanded vermiculite heat-insulating material and preparation method thereof
A technology of expanded vermiculite and thermal insulation materials, which is applied in the field of Al2O3 intercalated expanded vermiculite thermal insulation materials and its preparation, which can solve the problems of increased interlayer spacing, reduced compressive strength of thermal insulation materials, and low thermal conductivity. Achieve enhanced thermal insulation performance, increased compressive strength, and low thermal conductivity
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Embodiment 1
[0017] a kind of Al 2 o 3 Intercalated expanded vermiculite heat insulation material and its preparation method.
[0018] The first step is to mix expanded vermiculite: aluminum nitrate nonahydrate: ethanol according to the mass ratio of 1:1: (2~2.4), then dissolve aluminum nitrate nonahydrate in ethanol according to the mass ratio, and then add expanded vermiculite rock, stirred for 8-9.5 hours, and aged at room temperature for 1-2 hours to obtain the expanded vermiculite-aluminum gel compound;
[0019] The second step is to soak the expanded vermiculite aluminum gel compound in ethanol solution, soak it at 55~58℃ for 26~30h, then soak it at 68~71℃ for 50~54h, and then soak the expanded vermiculite aluminum The gel complex was taken out and dried at a constant temperature of 65~68°C for 72~78h to obtain Al 2 o 3 Intercalated expanded vermiculite;
[0020] The third step, with 40~55wt% Al 2 o 3 Intercalated expanded vermiculite and 45-60wt% forsterite are mixed as raw m...
Embodiment 2
[0023] a kind of Al 2 o 3 Intercalated expanded vermiculite heat insulation material and its preparation method.
[0024] The first step is to mix expanded vermiculite: aluminum nitrate nonahydrate: ethanol according to the mass ratio of 1:1: (2.4~3), then dissolve aluminum nitrate nonahydrate in ethanol according to the mass ratio, and then add expanded vermiculite, Stir for 9.5-11 hours, and age at room temperature for 1-2 hours to obtain the expanded vermiculite-aluminum gel compound;
[0025] The second step is to soak the expanded vermiculite aluminum gel compound in ethanol solution, soak for 22-26 h at 58-61°C, then soak for 46-50h at 70-73°C, and then soak the expanded vermiculite The aluminum gel composite was taken out and dried at a constant temperature of 68~70°C for 68~72h to obtain Al 2 o 3 Intercalated expanded vermiculite;
[0026] The third step, with 55~70wt% Al 2 o 3 Intercalated expanded vermiculite and 30-45wt% forsterite are mixed as raw materials,...
Embodiment 3
[0029] a kind of Al 2 o 3 Intercalated expanded vermiculite heat insulation material and its preparation method.
[0030] The first step is to mix expanded vermiculite: aluminum nitrate nonahydrate: ethanol according to the mass ratio of 1:1: (3~3.5), then dissolve aluminum nitrate nonahydrate in ethanol according to the mass ratio, and then add expanded vermiculite, Stir for 11~12h, and age at room temperature for 1~2h to obtain expanded vermiculite aluminum gel composite;
[0031] The second step is to soak the expanded vermiculite aluminum gel compound in ethanol solution, soak it at 61~65℃ for 18~22 hours, then soak it at 72~75℃ for 42~46 hours, and then soak the expanded vermiculite The aluminum gel composite was taken out and dried at a constant temperature of 70~75°C for 64~68h to obtain Al 2 o 3 Intercalated expanded vermiculite;
[0032] The third step, with 70~80wt% Al 2 o 3 Intercalated expanded vermiculite and 20-30wt% forsterite are mixed as raw materials, ...
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