A kind of preparation method of yttrium silicate ceramic powder
A ceramic powder, yttrium silicate technology, applied in coating, metal material coating process, melt spraying and other directions, can solve the problem of difficult to obtain a single crystal product and other problems, achieve stable pH value, high purity, guaranteed The effect of purity
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[0051] Take the preparation of 10 kg of yttrium silicate ceramic powder as an example. Weigh 7.9 kg Y 2 o 3 Dissolve in excess nitric acid, add deionized water to prepare 1mol / LY(NO 3 ) 3 Clear solution. According to Y 2 SiO 5 Medium SiO 2 % by weight, converted to tetraethyl orthosilicate TEOS ((C 2 h 5 ) 4 SiO 4 ) is 8.1L, the density of tetraethyl orthosilicate is 0.929g / ml, SiO 2 The content is 28%. Measure 8.1L tetraethyl orthosilicate, mix with 8.1L absolute ethanol (ErOH) and 36.4L deionized water (H 2 O) mix, and prepare tetraethyl orthosilicate prehydrolyzate. 1mol / LY(NO 3 ) 3 solution and TEOS:ErOH:H 2 O = 1:1:4 pre-hydrolyzate mix. Take 50L of distilled water and adjust its pH to 9-10 with concentrated ammonia water. Slowly add the above mixed solution into ammonia water with a pH value of 9-10 to carry out chemical co-precipitation reaction, adjust the reaction system with 2-fold diluted ammonia water to keep the pH value at 9-10. During this rea...
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