Injection molding aluminum oxide ceramic material and injection molding method thereof

Abstract

The invention discloses an injection molding aluminum oxide ceramic material and an injection molding method thereof, and relates to the technical field of ceramic materials. The invention discloses an injection molding aluminum oxide ceramic material which is prepared from the following raw materials in percentage by weight: 80.24 to 80.75 percent of ceramic powder, 5.03 to 5.15 percent of amorphous alpha-olefin copolymer, 4.88 to 5.00 percent of linear low density polyethylene, 1.58 to 2.31 percent of stearic acid, 3.36 to 4.35 percent of tributyl citrate, 2.45 to 2.53 percent of titanate coupling agent and 0.15 to 0.22 percent of sodium dinaphthyl methane disulfonate. The ceramic powder is composed of aluminum oxide powder, yttrium oxide powder and magnesium oxide powder; the invention further provides an injection molding method of the aluminum oxide ceramic material. The injection molding aluminum oxide ceramic material provided by the invention has excellent high strength and high toughness, is not liable to brittle fracture, is high in density and small in product shrinkage rate, and can be used for obtaining a product with high dimensional precision; the raw materials are easy to obtain, the preparation process is easy to control, the consumed time is short, and rapid and automatic large-scale production is easy.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to an injection molding alumina ceramic material and an injection molding method thereof. Background technique [0002] Ceramic injection molding (CIM) is a branch of modern powder injection molding (PIM) technology. It is a new technology for preparing ceramic parts developed by combining polymer injection molding method with ceramic preparation technology. The molding process has the characteristics of high degree of mechanization and automation, high production efficiency, short molding cycle, high blank strength, etc., and its process can be precisely controlled, and can be used for near-net molding of various small ceramic parts with complex geometric shapes and special requirements. , easy to achieve large-scale, large-scale production. The basic process of ceramic injection molding process is: uniformly mix ceramic powder, binder, dispersant and lubrica...

AI Technical Summary

Problems solved by technology

At present, there are mainly four mature binder systems: the first is thermoplastic system, which has good applicability, good fluidity, easy molding, high powder loading, and easy control of the injection process, but the degreasing time is long and the process is complicated. The cost is high; the second is a thermosetting system, which has high strength and fast degreasing speed, but the injection process is not easy to control, poor applicability, and many product defects; the third is a gel system, which has less organic matter and fast degreasing speed. Fast, but the green strength is low, and degreasing is difficult; the fourth is a water-soluble system, which has a fast degreasing speed, but the powder loading is small, resulting in low strength of the product

Since the ceramic injection molding technology has very strict requirements on the selection of ceramic powder, binder, dispersant, etc., thermoplastic system binders are commonly used in the world at present, and the selection of such binders is also particularly small. If the binder system is not selected properly, it will easily cause problems such as unevenness in the curing and degreasing process before sintering, and the binder is not easy to come out, which will easily cause the mechanical strength of the final product to be poor and brittle, and also affect the production of the product efficiency, which limits the development of domestic ceramic injection molding technology

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