A kind of preparation method of antifoaming agent required in the sintering process of porcelain green body

Abstract

Provided is a method for preparing defoamer required in the process of sintering of a porcelain embryo. The method comprises the steps of: mixing a metal corrosion inhibitor with water at a ratio of 2:10, heating the obtained mixture to 60 DEG C, stirring the mixture evenly, cooling the mixture to room temperature, then adding a mixture and supernatant into a high pressure reactor at a high temperature, conducting dehydration at 120-140 DEG C for 30 minutes under reduced pressure, conducting nitrogen replacement several times during the dehydration, and then adding propylene oxide to the highpressure reactor to induce a reaction at a temperature of 140 DEG C and pressure of not more than 0.3 MPa; when the reaction pressure decreases obviously, and the temperature rises sharply, which indicate that a catalyst is activated, controlling the temperature at 140-160 DEG C and the pressure in the reactor less than 0.3 MPa; when the pressure in the reactor no longer decreases, preserving thetemperature for the reaction for 30 minutes, and removing unreacted monomers under reduced pressure to obtain the defoamer. According to the method, the metal corrosion inhibitor and a dispersant areincluded in the defoamer; when liquid with a condensation effect is prepared, the defoamer is scattered on the surface of the embryo after high temperature vaporization, and by cooling the embryo, bubbles on the surface of the embryo can be reduced after temperature reduction.

Description

Technical field: [0001] The invention relates to the field of ceramics, in particular to a method for preparing a defoamer used in the sintering process of a porcelain body. Background technique: [0002] Ceramics is the general term for pottery and porcelain. The Chinese invented pottery as early as about 8000-2000 BC (Neolithic Age). Ceramic materials are mostly oxides, nitrides, borides and carbides. Common ceramic materials are clay, alumina, kaolin and so on. Ceramic materials generally have higher hardness, but poor plasticity. In addition to the use of tableware and decoration, it also plays an important role in the development of science and technology. The raw material of ceramics is obtained by quenching the earth's original large resource clay. The nature of clay is tough, it can be molded when exposed to water at room temperature, it can be carved when it is slightly dry, and it can be ground when it is completely dry; it can be made into pottery and can hol...

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Problems solved by technology

Ceramic materials generally have higher hardness, but poor plasticity

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