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Method for preparing high performance yttrium oxide material

A technology of yttrium oxide and raw materials, which is applied in the field of preparing high-performance yttrium oxide materials, can solve the problems of high sintering temperature, poor thermal shock resistance, and low strength, and achieve the effects of less equipment investment, improved production efficiency, and simple process

Inactive Publication Date: 2009-06-24
NORTHEASTERN UNIV
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  • Application Information

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Problems solved by technology

However, the disadvantages of high sintering temperature, poor thermal shock resistance and low strength limit its development.

Method used

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  • Method for preparing high performance yttrium oxide material
  • Method for preparing high performance yttrium oxide material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Use yttrium oxide powder with an average particle size of 1 μm as raw material, add 1 mol% additive powder with an average particle size of 0.5 μm, use an agate mortar to fully mix the raw materials, and use a metal mold to form under a pressure of 100 MPa. Then place the sample on MoSi 2 The microstructure can be obtained by heating at 1600°C for 5 hours in a resistance furnace, such as figure 1 Excellent rod-shaped grain-reinforced high-strength yttrium oxide material shown.

Embodiment 2

[0032] Add 5 mol% additives to yttrium nitrate, then add the mixed reagent into the alcohol aqueous solution with alcohol-water ratio of 5:1 and dissolve completely. Under the condition of vigorous stirring, slowly heat to 75°C and keep for a period of time, then slowly add ammonia water dropwise until the pH value of the solution is greater than 9. After cleaning with deionized water and alcohol, the obtained material is completely dried and then calcined at 400° C. to obtain nanoscale powder. The powder is molded under a pressure of 100 MPa with a metal mold. Then place the sample on MoSi 2 The microstructure can be obtained by heating at 1500°C for 2 hours in a resistance furnace, such as figure 2 A long columnar grain reinforced high strength yttrium oxide material is shown.

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Abstract

The invention relates to material preparation technology, in particular to a method for preparing a high-performance yttrium oxide material. The method prepares a rod, plate or cylindrical-shaped crystal strengthened yttrium oxide material by adding 0 to 40mol percent additives containing magnesium, strontium, calcium and other elements and adopting a proper sintering system at 1,000 to 1,800 DEG C. The technology has the characteristics of preparing the rod, plate or cylindrical-shaped crystal strengthened yttrium oxide material by adding the proper additives and adopting a proper sintering system. The content of the rod, plate or cylindrical-shaped crystals can be controlled by adjusting the factors such as the sintering system and the types and adding amount of the additives. The prepared yttrium oxide material has the advantages of high density, good heat and shock resistant performance, high strength and so on. In addition, the added additives can reduce the sintering temperature, save energy consumption and improve production efficiency. The method is simple in technical process, low in equipment investment and favorable for industrial large-scale production.

Description

Technical field: [0001] The invention relates to a material preparation technology, in particular to a method for preparing a high-performance yttrium oxide material. Background technique: [0002] my country is the country with the most abundant reserves of yttrium oxide in the world. The development of high-performance yttrium oxide materials can not only increase the development and utilization of rich yttrium oxide resources in my country, but also improve the production and consumption structure of yttrium oxide in China, and enhance the competitiveness of my country and developed countries in the development and utilization of new materials. [0003] Yttrium oxide ceramics have excellent characteristics such as high melting point and corrosion resistance, and have broad application prospects. However, the disadvantages of high sintering temperature, poor thermal shock resistance and low strength limit its development. Studies have shown that adding appropriate additi...

Claims

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Application Information

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IPC IPC(8): C01F17/00
Inventor 戴文斌王新丽于景坤
Owner NORTHEASTERN UNIV
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