Method for preparing ceramic body

Abstract

The invention discloses a method for preparing a ceramic body. The method comprises the following steps: water is used as a solvent, and water-soluble polybutadiene vinyl polymer is added to the solvent to prepare ceramic slurry; the prepared ceramic slurry is injected into a forming mold, and self-gel in-situ solidification is conducted at the temperature of 15 DEG C-40 DEG C in the air; and demolding and drying are conducted after sufficient solidification. Due to the fact that the self-gel in-situ solidification is carried out on the water-soluble polybutadiene vinyl polymer which has the functions of a dispersing agent and a gel reagent at the same time, and is low in toxicity, low in cost and easy to obtain to prepare the ceramic body, preparation cost is greatly reduced and pollution is reduced. Moreover, the method is simple in preparation technology, free of oxygen inhibition, capable of being operated in the air and free of harsh operating conditions and equipment requirements. Besides, the prepared ceramic body is high in intensity, good in toughness, bright and clean in surface, free of exfoliation and suitable for preparation of various oxide ceramics, oxide ceramics, composite ceramics and ceramics with complex shapes, and thus the method for preparing the ceramic body has industrial application prospects.

Description

technical field [0001] The invention relates to a method for colloidal molding of a ceramic body, in particular to a method for preparing a ceramic body by using a butene polymer as a dispersant and a gelling agent and solidifying in situ through a self-gel reaction . Background technique [0002] In the early 1990s, the Oak Ridge National Laboratory of the United States developed a gel injection molding process, which used the three-dimensional network structure formed by the polymerization of organic monomers to form a green body with a certain strength from the ceramic slurry. However, there is a problem of oxygen inhibition in this gel system, and a complete body cannot be prepared. In order to solve the problem of oxygen inhibition, E.Adolfson (J.Am.Cera.Soc., 2006, 89 [6] 1897-1902), add dispersant in zirconia slurry, and adopt Agarose as gel reagent, need It is inconvenient to configure the slurry under the environment of 60-65°C, and the solid content is only 35vol...

AI Technical Summary

Problems solved by technology

[0003] 1. The amount of organic matter is large, and the organic matter content in the waste liquid produced is relatively high, such as the curing agent polyethyleneimine or dipropylene triamine, which is highly toxic, irritating to the skin and mucous membrane, and harmful to the health of the operator unfavorable;

[0004] 2. The organic raw materials of the gel system are relatively expensive, and the high production cost is not suitable for large-scale production;

[0005] 3. The amount of organic matter added in the gel system is relatively large, and the waste liquid produced during the production process and the NO and NO produced by the debinding of the biscuit 2 Waste gas such as waste gas will pollute the environment greatly; thus, it will also increase the investment and production cost of waste water and waste gas treatment in industrial production