Preparation method for cubic zirconia-beta phase silicon carbide complex phase high temperature resistance powder material

A cubic zirconia powder material technology, applied in the field of high temperature resistant powder material preparation, can solve the problems of cubic zirconia powder easy to agglomerate, complex process, high cost, etc., to achieve high product added value, short process flow and low cost low effect

Inactive Publication Date: 2012-10-03
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cubic zirconia powder synthesized by these preparation methods has defects such as easy agglomeration and low purity, and its process is complicated, high in cost, and high in energy consumption. Therefore, it is of great significance to realize low-cost preparation of cubic zirconia raw materials and energy saving and consumption reduction.

Method used

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  • Preparation method for cubic zirconia-beta phase silicon carbide complex phase high temperature resistance powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw materials and ratio:

[0022] The particle size and quality requirements of zircon raw materials are, ZrSiO 4 The content is greater than 80% by mass, of which ZrO 2 The content is greater than 50% by mass, the particle size is ≤1mm; carbon black is used as the reducing agent, the particle size and quality requirements of the carbon black reducing agent are, the carbon content is greater than 98% by mass, and the particle size is ≤1μm The mass ratio of the added amount is 5:1; industrially pure yttrium oxide is used as an additive, and the added amount of the yttrium oxide is an additional 10% by mass.

[0023] crafting process:

[0024] The above-mentioned various raw materials are made into a sample green body of Φ20mm×20mm through batching, mixing, ball milling, drying, molding and other processes, and then the sample is placed in a coke-buried airtight high-temperature resistant In a sagger container, place the high temperature resistant container in a high t...

Embodiment 2

[0027] Raw materials and ratio:

[0028] The particle size and quality requirements of zircon sand raw materials are, ZrSiO 4 The content is greater than 95% by mass, of which ZrO 2 The content is greater than 60% by mass, and the particle size is ≤1mm; activated carbon is selected as the reducing agent, and the particle size and quality requirements are that the carbon content in the activated carbon is greater than 98% by mass, and the particle size is ≤1μm; the mass of zircon and activated carbon added The ratio is 5:1; industrial pure magnesia is used as an additive, and the amount of magnesia added is an additional 8wt% by mass.

[0029] crafting process:

[0030] The above-mentioned various raw materials are made into a sample green body of Φ20mm×20mm through batching, mixing, ball milling, drying, molding and other processes, and the sample is placed in an open graphite crucible, and then the graphite crucible is placed in argon gas. After being kept at 1650°C for 6 ho...

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Abstract

The invention relates to a preparation method for a cubic zirconia-beta phase silicon carbide complex phase high temperature resistance powder material, belonging to the technical field of the preparation of the high temperature resistance powder material. The preparation method is characterized by comprising the following steps of: using zirconia, zircon sand or zirconium silicate as main raw materials, carbon black, coke, graphite or activated carbon as reducing agents, magnesium oxide, calcium oxide, yttrium oxide or cerium oxide as additives, mixing the materials according to certain proportions, and then preparing the cubic zirconia-beta phase silicon carbide complex phase high temperature resistance powder material by adopting technological processes such as ball-milling, drying, molding and carbon thermal reduction. The preparation method for the cubic zirconia-beta phase silicon carbide complex phase high temperature resistance powder material has the advantages of short technological process, non-pollution, low energy consumption, lower cost and the like.

Description

Technical field: [0001] The invention discloses a method for preparing a cubic zirconia-β-phase silicon carbide composite phase high-temperature-resistant powder material, which belongs to the technical field of high-temperature-resistant powder material preparation. Background technique: [0002] Zirconia materials have excellent mechanical, thermal, electrical and optical properties, and are widely used in many fields such as high-temperature structural materials, dielectric materials, high-temperature optical devices for sensors, and fuel cells. Cubic phase zirconia has very excellent physical properties, including rare high melting point, high thermal conductivity, high elastic modulus, and can maintain high strength at high temperature, and also has good thermal shock resistance and moderate thermal expansion It is considered to be one of the most promising materials in the high temperature field in the future. Silicon carbide materials have excellent properties such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/48C04B35/565
Inventor 黄朝晖徐友果房明浩刘艳改尹丽关鸣吴泽霖
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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