A kind of thermite reduction prepares ti 2 Alc ceramic powder method

A technology of ceramic powder and thermite, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high cost of raw materials and process costs, and achieve the effects of low cost, high reaction efficiency, and wide sources

Active Publication Date: 2021-11-02
YANGTZE NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, although the preparation process of this method is relatively fast, it still directly uses metal powder as the raw material, and adopts ultrasonic-assisted thermal explosion as the preparation process, and still has the defects of high raw material cost and process cost.

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  • A kind of thermite reduction prepares ti <sub>2</sub> Alc ceramic powder method
  • A kind of thermite reduction prepares ti <sub>2</sub> Alc ceramic powder method
  • A kind of thermite reduction prepares ti <sub>2</sub> Alc ceramic powder method

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specific Embodiment approach

[0049] DETAILED DESCRIPTION OF THE INVENTION: A aluminum heat reduction preparation Ti 2 ALC ceramic powder method, process figure 1 As shown, including the following steps:

[0050] Step 1: The proportion of the satisfaction is 1: (0.16-0.38): (0.02-0.05) of sodium fluorititate, aluminum powder and activated carbon powder are wet after mixing, the material wet grinding time is 2-8 hours, wet grinding After drying, dry milling in a vacuum or inert atmosphere, the dry mill is 4-12 hours;

[0051] Step 2: The material after mixed grinding is then placed in the mold, and the cold pressure is obtained under 40-120 MPa conditions;

[0052] Step 3: Place the green blank in a vacuum reduction furnace for thermal reduction, the reduction temperature is 800-1500 ° C, the vacuum is 10 -4 -10Pa, the reduction time is 1-6 hours;

[0053] Step 4: After the reduction is completed, the control temperature is vacuum distillation at 1000-1350 ° C, the distillation time is 2-12 hours, and the disti...

Embodiment 1

[0061] Based on the above specific embodiment, the following requirements are performed: 300 grams of sodium titanate, 74.3 grams of aluminum powder, 8.8 grams of activated carbon powder, in anhydrous ethanol medium, the material ball ratio is 2: 1, using planetary The ball mill was wet for 4 hours, followed by vacuuming under 60 ° C for 12 hours; in a high energy intake material, high energy activation was carried out in a high-purity argon atmosphere; a mixture of activated mixture Placed in a steel mold, cold pressure under 50 MPa pressure; then placed in a reduction furnace, heat reduction under vacuum conditions, the reduction temperature is 1250 ° C, the vacuum is 10 -3 PA, the reduction time is 3 hours; after the reducing process, open the vacuum system for vacuum distillation, set the distillation temperature of 1200 ° C, 5 hours of distillation time, close the control system after completion, and cool to room temperature under vacuum conditions, The crude product was redu...

Embodiment 2

[0064] On the basis of satisfying the above specific embodiment, the following requirements are performed: 616.3 grams of sodium rhodide, 152.5 g of aluminum powder, and 18.1 grams of activated carbon powder, in anhydrous ethanol medium, the material ball ratio is 2: 1, using planetary The ball mill was wet for 5 hours, followed by vacuuming at 60 ° C for 16 hours; then placed the dried mixture in a high energy ball mill for 10 hours under vacuum conditions; the activated mixture was placed in steel In the mold, the blanket is cold under 50 mPa pressure; then placed in the reduction furnace, heat reduction under vacuum conditions, the reduction temperature is 1250 ° C, the vacuum is 10 -3 PA, the reduction time is 4 hours; after the reducing process is completed, the vacuum system is turned on to vacuum distillation, the distillation time is 7 hours, and the control system is closed after completion, and the material is cooled to room temperature under argon conditions, and 191.3 ...

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Abstract

The invention discloses an aluminothermic reduction method for preparing Ti 2 The method for AlC ceramic powder is characterized in that, the fluorotitanate, aluminum powder and active carbon powder that mass ratio is 1:(0.16-0.38):(0.02-0.05) are raw materials, after mixed grinding, carry out After thermal reduction reaction and vacuum distillation, remove impurities. The invention has the advantages of simple raw material requirements, wide sources, lower cost, shorter process flow, higher reaction efficiency, better controllability, and utilization of all elements.

Description

Technical field [0001] The present invention relates to a technical field for preparing a ceramic material, particularly relates to the preparation of a Ti aluminothermic reduction 2 Methods AlC ceramic powder. Background technique [0002] In recent years, with the rapid development of social economy, people's demand for more and more widely ceramic material, the ceramic material is an advantageous melting point, high hardness, high wear resistance and oxidation resistance such as inorganic non-metallic materials . It can be used for construction materials and tools, while there will be some special ceramic properties, and therefore can be used as a functional material. The ceramic powder is a ceramic material prepared products, good ceramic products, usually prepared ceramic powder can be obtained more attractive appearance and excellent performance. [0003] Mn + 1AXn (referred to as the MAX phase) is a ceramic having a ternary carbon nano-layered structure / nitride ceramic, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/90
CPCC01P2002/72C01P2004/61C01P2006/80C01B32/90
Inventor 赵坤李言栋张晓东
Owner YANGTZE NORMAL UNIVERSITY
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