CPC C09J 1/00 (2013.01) [C08K 3/22 (2013.01); C08K 3/24 (2013.01); C08K 3/32 (2013.01); C08K 3/346 (2013.01); C08K 3/36 (2013.01); C08K 3/38 (2013.01); C08K 9/02 (2013.01); C09J 7/10 (2018.01); C09J 7/35 (2018.01); C08K 2003/2227 (2013.01); C08K 2003/321 (2013.01); C08K 2003/329 (2013.01); C09J 2400/10 (2013.01)] | 8 Claims |
1. A preparation method for a phosphate-based high-temperature-resistant adhesive self-reinforced by in-situ growth and locking of flaky kyanite applied in a temperature range of 700 degrees Celsius (° C.) to 1300° C., comprising following steps:
step 1, mixing bauxite:kaolin:boric acid:boron oxide according to a mass ratio of 3.35-4.85:8-9:1.5-2.25:1-1.5 to obtain a mixture, placing the mixture in a ball milling tank, adding absolute ethyl alcohol into the ball milling tank according to a solid-liquid ratio of 1:0.8-1.2, carrying out ball milling for 6-12 hours at 250-350 revolutions per minute (r/min) by using a ball mill to obtain a ball-milled mixture, taking out the ball-milled mixture for drying and grinding to obtain a modified filler;
step 2, diluting concentrated phosphoric acid with a mass fraction of 85 wt. % to a mass fraction of 40-50 wt. % to obtain diluted phosphoric acid, heating the diluted phosphoric acid to a temperature range of 70-85° C. in a water bath kettle with a cooling reflux device, and then rapidly pouring aluminum hydroxide powder with an aluminum-phosphorus molar ratio of 0.65-0.85 into the diluted phosphoric acid under a mechanical stirring at 500-650 r/min, followed by keeping the temperature range of 70-85° C., stirring for 1-2 hours at 750-850 r/min, and then stirring for 6-8 hours at 300-400 r/min, thereby obtaining a white adhesive slurry; and
step 3, adjusting the temperature range of the water bath kettle in the step 2 to 50-65° C., then mixing the modified filler in the step 1 into the white adhesive slurry in the step 2 according to a solid-liquid mass ratio of 1:4 to 1:6, and mixing silicon powder with a mass fraction of 3-7 wt. % of a total mass of the modified filler and the white adhesive slurry into the modified filler and the white adhesive slurry, and then alternately stirring for 8-12 hours with different speeds at a speed range of 300-700 r/min, thereby preparing the phosphate-based high-temperature-resistant adhesive self-reinforced by in-situ growth and locking of flaky kyanite.
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