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A method for preparing alumina-based amorphous and solid solution ceramic micropowder mixture by alumina-oxygen combustion synthesis quenching method

A combustion synthesis, alumina-based technology, applied in the field of aluminum oxygen combustion synthesis high-temperature melt combined with rotating metal disk or roll equipment quenching, can solve the problems of high cost, low purity and low efficiency of amorphous metal materials, and achieve the production cycle The effect of short, high purity and simple process

Active Publication Date: 2021-12-21
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the technical problems of high cost, low purity, low efficiency, long time and low output that can only be produced in small batches in the preparation of amorphous metal materials by the existing method, and provides an aluminum-oxygen combustion synthesis quenching method to prepare Al 2 o 3 Method based on amorphous and solid solution ceramic micropowder mixture

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  • A method for preparing alumina-based amorphous and solid solution ceramic micropowder mixture by alumina-oxygen combustion synthesis quenching method
  • A method for preparing alumina-based amorphous and solid solution ceramic micropowder mixture by alumina-oxygen combustion synthesis quenching method
  • A method for preparing alumina-based amorphous and solid solution ceramic micropowder mixture by alumina-oxygen combustion synthesis quenching method

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specific Embodiment approach 1

[0039] Specific implementation mode 1: In this implementation mode, an aluminum-oxygen combustion synthesis quenching method is used to prepare Al 2 o 3 Based on the method of amorphous and solid solution ceramic micropowder mixture, the method is specifically carried out in the following steps:

[0040] 1. Dry the aluminum powder and diluent, and mix them evenly to obtain a mixed powder; according to the parts by mass, the aluminum powder is 10-40 parts, and the diluent is 60-90 parts;

[0041] 2. Put the mixed powder obtained in step 1 into a pressure-resistant reactor with a nozzle at the lower end, pass in an oxidizing gas, ignite the mixed powder to initiate a synthesis reaction, keep warm, and then open the nozzle of the pressure-resistant reactor to perform a pressure-resistant reaction The composite melt in the container is sprayed to the rotating metal disc or the pair of rolls of the roll equipment to cool down, then pulverized and ball milled to obtain Al 2 o 3 B...

specific Embodiment approach 2

[0042] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the diluent in the step one is barium oxide, iron oxide, vanadium oxide, molybdenum oxide, aluminum oxide, zirconium oxide, magnesium oxide, calcium oxide, oxide Strontium oxide, scandium oxide, titanium oxide, chromium oxide, cobalt oxide, nickel oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, One or a mixture of terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide and silicon oxide. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: when Al 2 o 3 When zirconia is contained in the mixture of base amorphous and solid solution ceramic micropowder, Y 2 o 3 with ZrO 2 The molar ratio of CeO is (0~15):100; CeO 2 with ZrO 2 The molar ratio of (0~30): 100; MgO and ZrO 2 The molar ratio of CaO and ZrO is (0~28):100; 2 The molar ratio of TiO is (0~33.45):100; TiO 2 with ZrO 2 The molar ratio of (0~44.41): 100; Sc 2 o 3 with ZrO 2 The molar ratio is (0~20):100. Others are the same as in the first or second embodiment.

[0044] Y in this embodiment 2 o 3, CeO 2 , MgO, CaO, TiO 2 , Sc 2 o 3 The role of the phase change stabilizer.

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Abstract

A method for preparing a mixture of alumina-based amorphous and solid solution ceramic micropowder by the rapid cooling method of alumina-oxygen combustion synthesis. Method of quenching metal disc or roll equipment. The invention aims to solve the technical problems of high cost, low efficiency, long time, low output and only small batch production in the existing preparation method. Method: 1. Prepare mixed powder; 2. Initiate synthesis reaction, keep warm, cool in rotating metal disk or rollers of rolling equipment, then pulverize and ball mill. The method has the advantages of simple technological process, rapid reaction, short preparation period, large output, high purity and controllability, and is a low-cost, high-efficiency, high-performance preparation method of metastable micron powder. The present invention is used to prepare Al 2 o 3 Based amorphous and solid solution ceramic micropowder mixture.

Description

technical field [0001] The invention relates to the field of a method for preparing composite ceramic powder, in particular to a method for rapid cooling of a high-temperature melt synthesized by alumina-oxygen combustion combined with a rotating metal disc or roll equipment. Background technique [0002] Combustion synthesis, also known as self-propagating high-temperature synthesis (SHS for short). This method does not require an external heat source, and relies on the heat released when the raw materials themselves react to synthesize inorganic refractory materials. The method has the advantages of low cost, low energy consumption, high reaction temperature and high production efficiency. [0003] In the field of amorphous material preparation, the main research focuses on the preparation of metal amorphous, and industrialized production has been realized; there are relatively few introductions about the preparation of ceramic amorphous, and there is basically no prepara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/626
CPCC04B35/10C04B35/626C04B2235/3225C04B2235/3244C04B2235/3229C04B2235/402C04B2235/5445C04B2235/5436
Inventor 郑永挺于永东蒋劲松栢跃磊赫晓东
Owner HARBIN INST OF TECH
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