Improved silicon oxide ceramic core and preparation method thereof

A ceramic core, silicon oxide technology, applied in the core, casting molding equipment, casting and other directions, can solve the problems of poor high temperature performance, large firing shrinkage rate, etc., to improve the molding rate, good fluidity, and the preparation process. and simple operation

Active Publication Date: 2014-06-25
佛山市非特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of large firing shrinkage and poor high-temperature perf

Method used

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  • Improved silicon oxide ceramic core and preparation method thereof
  • Improved silicon oxide ceramic core and preparation method thereof
  • Improved silicon oxide ceramic core and preparation method thereof

Examples

Experimental program
Comparison scheme
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specific Embodiment approach 1

[0018] Embodiment 1: An improved silicon oxide ceramic core in this embodiment is prepared from ceramic slurry and plasticizer; the mass ratio of the ceramic slurry to plasticizer is 100: (10-20 ); the ceramic slurry is formed by mixing 60-70 parts of quartz glass powder, 20-30 parts of zircon powder, 0.5-1.5 parts of analytically pure yttrium oxide and 5-15 parts of cristobalite in parts by mass; wherein The quartz glass powder is mixed by 200 mesh quartz glass powder, 300 mesh quartz glass powder and 400 mesh quartz glass powder, wherein the mass ratio of 200 mesh quartz glass powder to 300 mesh quartz glass powder is (4~6 ): 3, wherein the mass ratio of 200-mesh quartz glass powder to 400-mesh quartz glass powder is (4-6): 2; wherein the zircon powder is composed of 180-mesh zircon powder and 250-mesh zircon powder Mixed, wherein the mass ratio of 180 mesh zircon powder to 250 mesh zircon powder is (2-4):1; wherein the cristobalite is 300 mesh quartz; the plasticizer is mad...

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of the ceramic slurry to the plasticizer is 100:15. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the ceramic slurry is composed of 64 parts of quartz glass powder, 25 parts of zircon powder, 1 part of analytically pure yttrium oxide and 10 parts by mass. Parts of cristobalite are mixed; wherein the quartz glass powder is mixed with 200 mesh quartz glass powder, 300 mesh quartz glass powder and 400 mesh quartz glass powder, wherein the 200 mesh quartz glass powder is mixed with 300 mesh quartz glass powder The mass ratio of the powder is 5:3, wherein the mass ratio of the 200-mesh quartz glass powder to the 400-mesh quartz glass powder is 5:2; wherein the zircon powder is composed of 180-mesh zircon powder and 250-mesh zircon powder powder, wherein the mass ratio of the 180-mesh zircon powder to the 250-mesh zircon powder is 3:1. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an improved silicon oxide ceramic core and a preparation method thereof and relates to a ceramic core and a preparation method thereof. The improved silicon oxide ceramic core disclosed by the invention is used for solving the problem that the conventional ceramic core is high in shrinkage rate and bad in high-temperature resistance. The product is prepared from ceramic slurry and a plasticizer, wherein the ceramic slurry is formed by mixing quartz glass powder, zircon power, analytically pure yttrium oxide and cristobalite; the plasticizer is prepared by mixing paraffin, beewax and polyethylene. The method comprises the following steps: 1, preparing the plasticizer; 2, preparing the ceramic slurry; 3, preparing a precast material; 4, preparing the improved silicon oxide ceramic core. The sintered shrinkage rate of the improved silicon oxide ceramic core is 0.041 percent and is far lower than the shrinkage rate of an existing silicon oxide ceramic core, the shrinkage rate is reduced by 0.193 percent, the high temperature deformation is 1.51mm and is lower than high temperature deformation of the existing ceramic core, and the high temperature deformation is reduced by 2.66mm. The method is simple in operation, and the experimental time is shortened.

Description

technical field [0001] The invention relates to a ceramic core and a preparation method thereof. Background technique [0002] The aero engine is the heart of the aircraft and one of the main factors determining the performance of the aircraft, and an important indicator to measure the performance of the engine is the thrust-to-weight ratio. For more than half a century, aero-engine technology has made great progress, and the thrust-to-weight ratio of military engines has increased at an average rate of 16% per year. The development of aero-engines stems from continuous breakthroughs in new materials and technologies. For this reason, countries all over the world have carried out research on high thrust-to-weight ratio aeroengines. [0003] As we all know, increasing the temperature of the front port of the turbine is the most effective way to increase the thrust-to-weight ratio of an aeroengine. Generally speaking, whenever the inlet temperature of the turbine increases ...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622C04B35/634B22C9/10B22C1/00
Inventor 曾岩薛祥
Owner 佛山市非特新材料有限公司
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