Inorganic-organic compound hole sealing coating
A kind of sealing, inorganic technology, applied in the field of coating, can solve the problem of use limitation, achieve the effect of good hydrophobicity and oleophobicity, wide application and low friction coefficient
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Embodiment 1
[0027] (1) With TEOS and Al(NO 3 ) 3 as precursors, EtOH and H 2 O is a solvent, hydrochloric acid is a catalyst, and SiO is prepared 2 -Al 2 o 3 Sol sealant. Measure 5ml of deionized water, weigh Al(NO 3 ) 3 Add 5.6g into deionized water, stir to dissolve to obtain solution 1; dissolve 3ml TEOS in 10mlH 2 After 0, add hydrochloric acid to adjust the pH value to 3-4 to obtain solution 2; mix the above two solutions of 1 and 2 evenly, and stir with a magnetic stirrer, after stirring for about 15 minutes, add 0.2g hexagonal boron nitride, and continue stirring for 1 hour , aging at room temperature for 5h, the SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 2.6×10 -3 (N·S / m 2 ).
[0028] (2) Put the P7412 sample prepared by plasma spraying into acetone and ultrasonically clean it, then clean it with distilled water, and finally clean it with deionized water, and dry it before use. The above-mentioned coating was sealed by dipping-pulling method, and the surface...
Embodiment 2
[0032] (1) With TEOS and Al(NO 3 ) 3 as precursors, EtOH and H 2 O is a solvent, hydrochloric acid is a catalyst, and SiO is prepared 2 -Al 2 o 3 Sol sealant. Measure 5ml of deionized water, weigh Al(NO 3 ) 3 Add 5.6g into deionized water, stir to dissolve to obtain solution 1; dissolve 3ml TEOS in 10mlH 2 After 0, add hydrochloric acid to adjust the pH value to 3-4 to obtain solution 2; mix the above-mentioned 1 and 2 solutions evenly, and stir with a magnetic stirrer. After stirring for about 15 minutes, add 0.3 g of whisker silicon, and continue stirring for 1 hour. After aging for 4 hours at room temperature, SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 2.8×10 -3 (N·S / m 2 ).
[0033] (2) Put the plasma sprayed P7418 coating sample into acetone and ultrasonically clean it, then clean it with distilled water, and finally clean it with deionized water, and dry it before use. The above-mentioned coating was sealed by dipping-pulling method, and the surface...
Embodiment 3
[0037] (1) Measure 4.4ml of deionized water, weigh Al(NO 3 ) 3 Add 11.25g into deionized water, stir to dissolve to obtain solution 1; dissolve 2.2ml TEOS in 8.8mlEtOH, then add hydrochloric acid to adjust the pH value to 3-4, and obtain solution 2; mix the above two solutions of 1 and 2 evenly , and stirred with a magnetic stirrer, after stirring for about 15min, add 0.3g of mica flakes, continue to stir for 0.5h, and age at room temperature for 3h to obtain SiO 2 -Al 2 o 3 Sol sealing agent, its viscosity is 3.1×10 -3 (N·S / m 2 ).
[0038] (2) Put the P7412 sample prepared by plasma spraying into acetone for scrubbing, then wash it with distilled water, and finally wash it with deionized water, and dry it with an airflow dryer before use. The above-mentioned coating was sealed by ultrasonic impregnation-lifting method, and the surface-treated sample was placed in SiO 2 -Al 2 o 3 Immerse in the sol for 40s, then slowly pull the sample at a uniform speed, the pulling s...
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