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A method for preparing alumina-based solid solution ceramic powder by combustion synthesis of water mist

A technology of alumina-based and ceramic powders, which is applied in the field of preparation of alumina-based solid solution ceramic powders, and can solve the problems of inability to industrialize production, long production cycle, and high cost of matrix-composite powders

Active Publication Date: 2020-01-14
HARBIN JEHOT ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention is to solve existing method and prepare Al 2 o 3 In view of the high cost of matrix composite powder, long production cycle, and the inability to industrialize production, a method for preparing alumina-based solid solution ceramic powder by combustion synthesis of water mist is provided

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  • A method for preparing alumina-based solid solution ceramic powder by combustion synthesis of water mist
  • A method for preparing alumina-based solid solution ceramic powder by combustion synthesis of water mist
  • A method for preparing alumina-based solid solution ceramic powder by combustion synthesis of water mist

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specific Embodiment approach 1

[0058] Specific implementation mode 1: The method for preparing alumina-based solid solution ceramic powder by combustion synthesis water mist method in this embodiment comprises the following steps:

[0059]Dry the raw materials separately, then mix them evenly, put them into a high-pressure reactor, ignite the raw materials under the reaction atmosphere, and carry out a high-temperature combustion synthesis reaction. After the reaction is complete, a high-temperature melt is obtained. After 1-60 seconds of heat preservation, the high-pressure reactor is turned on Nozzle, under the action of high-pressure gas in the high-pressure reactor, the melt is ejected at a high flow rate, and after rapid cooling in the liquid phase, alumina-based solid solution ceramic powder is obtained; wherein the raw materials are composed of 10-35 parts by mass of aluminum powder, It consists of 10-40 parts of nitrate and 25-80 parts of diluent.

[0060] to combine figure 1 and figure 2 To illu...

specific Embodiment approach 2

[0065] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the nitrate is aluminum nitrate, zirconium nitrate, magnesium nitrate, calcium nitrate, strontium nitrate, scandium nitrate, titanium nitrate, chromium nitrate, iron nitrate, nitric acid Barium, vanadium nitrate, molybdenum nitrate, cobalt nitrate, nickel nitrate, yttrium nitrate, niobium nitrate, hafnium nitrate, tantalum nitrate, lanthanum nitrate, cerium nitrate, praseodymium nitrate, neodymium nitrate, samarium nitrate, europium nitrate, gadolinium nitrate, terbium nitrate, Dysprosium nitrate, holmium nitrate, erbium nitrate, thulium nitrate, ytterbium nitrate, lutetium nitrate or a mixture of several in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0066] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the diluent is aluminum oxide, iron oxide, barium oxide, zirconium oxide, magnesium oxide, calcium oxide, strontium oxide, scandium oxide, titanium oxide , chromium oxide, cobalt oxide, nickel oxide, yttrium oxide, niobium oxide, vanadium oxide, molybdenum oxide, hafnium oxide, tantalum oxide, lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, oxide Terbium, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, silicon oxide, lutetium oxide or a mixture of several in any ratio. Others are the same as in the first or second embodiment.

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Abstract

A method for preparing an alumina-based solid solution ceramic powder by means of a combustion synthesis water mist method, wherein the raw materials are separately dried, mixed well, loaded into a high-pressure reactor, and the raw materials are ignited under a reaction atmosphere to carry out a high-temperature combustion synthesis reaction; a high-temperature melt is obtained after the reaction is complete, then a high-pressure reactor nozzle is opened after thermal insulation; under the action of a high-pressure gas in the high-pressure reactor, the melt is sprayed at a high speed, and is rapidly cooled by means of a liquid phase to obtain an alumina-based solid solution ceramic powder. The method does not have high particle size requirements for the raw materials, and a micron-scale powder is utilized, thus costs are greatly reduced, the efficiency of processing is high and industrial production may be carried out.

Description

technical field [0001] The invention relates to a preparation method of alumina-based solid solution ceramic powder. Background technique [0002] Alumina ceramics have excellent characteristics such as low price, high hardness, high temperature resistance, oxidation resistance, corrosion resistance, high electrical insulation and low dielectric loss. However, the low toughness and brittle fracture of oxide ceramics seriously restrict the further application of oxide ceramics. At present, the most commonly used method for toughening oxide ceramics is to dope nano second phases in the ceramic matrix to prepare nanocomposite ceramics. The toughness of ceramics can be effectively improved by composite toughening and nano toughening, such as using ZrO 2 Ceramics have excellent phase transformation toughening effect, while Al 2 o 3 and ZrO 2 It also has good chemical and physical compatibility, and the use of nanotechnology to prepare zirconia toughened alumina ceramics (ZrO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/119C04B35/117C04B35/488C04B35/626
CPCC04B35/117C04B35/119C04B35/4885C04B35/62665C04B2235/3244C04B2235/402C04B2235/443C04B2235/96
Inventor 郑永挺郁万军林逢雨于永东叶伟郑远迪
Owner HARBIN JEHOT ADVANCED MATERIALS CO LTD