Injection molding aluminum oxide ceramic material and injection molding method thereof

A kind of alumina ceramics, injection molding technology, applied in the field of ceramic materials, can solve the problems that affect the production efficiency of products, the injection process is not easy to control, and the mechanical strength of products is poor, so as to achieve excellent mechanical strength and impact resistance, moderate viscosity and fluidity Good results

Pending Publication Date: 2022-05-17
新化县正能精细陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Injection molding aluminum oxide ceramic material and injection molding method thereof
  • Injection molding aluminum oxide ceramic material and injection molding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The injection molded alumina ceramic material of the present embodiment is made up of the following raw materials in weight percentage: ceramic powder 80.24%, APAO 5.15%, LLDPE 5.00%, stearic acid 1.58%, tributyl citrate 4.35%, titanate Coupling agent 2.53%, dinaphthyl methane disulfonic acid 1.15%, wherein ceramic powder is made up of the raw material of following mass percentage: aluminum oxide powder 95.4%, yttrium oxide powder 1.4% and magnesium oxide powder 3.2%, and this ceramic powder The particle size is 30-60nm.

[0029] The injection molding method of the above-mentioned injection molding alumina ceramic material specifically includes the following steps:

[0030] S1. Rough mixing: Weigh the raw materials according to the above mass percentage, first place the ceramic powder at 200°C to dry for 2 hours, then add all the raw materials in proportion to the constant temperature stirring mixer, set the stirring rate to 260r / min, and set the temperature at 110°C S...

Embodiment 2

[0037] The injection-molded alumina ceramic material of the present embodiment is made up of the following raw materials in percentage by weight: ceramic powder 80.75%, APAO 5.03%, LLDPE 4.88%, stearic acid 2.31%, tributyl citrate 3.36%, titanate Coupling agent 2.45%, dinaphthyl methane disulfonic acid 1.22%, wherein ceramic powder is made up of the raw material of following mass percentage: aluminum oxide powder 97.28%, yttrium oxide powder 0.93% and magnesium oxide powder 1.79%, and this ceramic powder The particle size is 30-60nm.

[0038] The specific steps of the injection molding method of the above-mentioned injection molding alumina ceramic material are the same as those in Example 1, specifically refer to Example 1, but differently, in the extrusion process of Example 2, four repeated extrusions were carried out at 155°C out to prepare a mixed material.

Embodiment 3

[0040] The injection-molded alumina ceramic material of the present embodiment is made up of the following raw materials in percentage by weight: ceramic powder 80.36%, APAO 5.12%, LLDPE 4.95%, stearic acid 2.08%, tributyl citrate 3.85%, titanate Coupling agent 2.46%, dinaphthyl methane disulfonic acid 1.18%, wherein ceramic powder is made up of the raw material of following mass percentage: aluminum oxide powder 96.81%, yttrium oxide powder 1.07% and magnesium oxide powder 2.12%, and this ceramic powder The particle size is 30-60nm.

[0041] The specific steps of the injection molding method of the above-mentioned injection molding alumina ceramic material are the same as those in Example 1, specifically refer to Example 1, but differently, in the extrusion process of Example 3, five repeated extrusions were carried out at 155°C out to prepare a mixed material.

[0042] Example 3:

[0043] The injection-molded alumina ceramic material of the present embodiment is made up of...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10B28B1/24C04B35/622C04B35/638C04B35/64C04B35/634C04B35/632
CPCC04B35/10B28B1/24C04B35/622C04B35/638C04B35/64C04B35/63408C04B35/632C04B2235/48C04B2235/3225C04B2235/3206C04B2235/6562C04B2235/6567C04B2235/96C04B2235/77
Inventor 何震
Owner 新化县正能精细陶瓷有限公司
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