High temperature adhesive for ceramic fiber boards and molded products and preparation method thereof
A high-temperature adhesive and ceramic fiber board technology, applied in the field of adhesives, can solve the problems that metal or ceramic components cannot be used for connection, ceramic fiber boards cannot be used, and the temperature resistance is not high, and achieves remarkable thermal insulation effect, good environmental benefits, The effect of reducing high energy consumption
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[0030] Such as figure 1 Shown, based on above-mentioned high-temperature adhesive, its preparation method comprises the steps:
[0031] Preparation of the inorganic refractory solvent, providing silica sol or aluminum sol with a concentration of 10 or 30%, mixing the silica sol or aluminum sol with water at a volume ratio of 2:1 to 3:1 to obtain the inorganic refractory solvent;
[0032] Provide 55% to 70% of refractory material, 2% to 5% of expansion material, and 0.5% to 1% of adhesive, and mix with 25% to 40% of inorganic refractory solvent, and stir evenly to obtain the high-temperature glue.
[0033] In the above preparation method, the stirring time is 1.8-2.2 hours; the penetration of the obtained high-temperature adhesive is 370-400.
[0034] When using the high-temperature adhesive of the present invention, take an appropriate amount of ceramic fiber adhesive, add 0%-3% water and stir evenly. Use a paintbrush or a tile tool to evenly apply the high-temperature adhe...
Embodiment 1
[0039] Provide a silica sol with a concentration of 30%, mix the silica sol and water at a volume ratio of 2:1 to obtain an inorganic refractory solvent with a mass fraction of 26%; provide 70% alumina powder, 3% bentonite, 1% polyacrylamide, mixed with the 26% inorganic refractory solvent, and stirred for 2 hours to obtain a high-temperature adhesive with a penetration of 370. Among them, the particle size of the alumina powder is 4 μm.
[0040] The obtained high-temperature adhesive is used to bond two 80×40×40mm C1 bricks, and the size of the bricks after bonding is 160×40×40mm. The bonded bricks were dried at 105°C for 24 hours, and then calcined at 1000°C for 3h. Then, tests for flexural strength and heating wire shrinkage were carried out. The test results are: the flexural strength is 1.8MPa, and the heating line shrinkage rate is 1400°C×24h=2.5%.
Embodiment 2
[0042] Provide aluminum sol with a concentration of 10%, mix aluminum sol and water at a volume ratio of 3:1 to obtain an inorganic refractory solvent with a mass fraction of 30%; provide 65% alumina powder, 4% bentonite, 1% polyacrylamide, mixed with the 30% inorganic refractory solvent, and stirred for 2 hours to obtain a high-temperature adhesive with a penetration of 380. Among them, the particle size of the alumina powder is 4 μm.
[0043] The obtained high-temperature adhesive is used to bond two 80×40×40mm C1 bricks, and the size of the bricks after bonding is 160×40×40mm. The bonded bricks were dried at 105°C for 24 hours, and then calcined at 1000°C for 3h. Then, tests for flexural strength and heating wire shrinkage were carried out. The test results are: the flexural strength is 1.65MPa, and the heating line shrinkage rate is 1400°C×24h=2.4%.
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Abstract
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