WO2017079878A1 - Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium - Google Patents

Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium Download PDF

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Publication number
WO2017079878A1
WO2017079878A1 PCT/CN2015/094138 CN2015094138W WO2017079878A1 WO 2017079878 A1 WO2017079878 A1 WO 2017079878A1 CN 2015094138 W CN2015094138 W CN 2015094138W WO 2017079878 A1 WO2017079878 A1 WO 2017079878A1
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WO
WIPO (PCT)
Prior art keywords
powder
alumina
aluminum nitride
composite powder
carbon
Prior art date
Application number
PCT/CN2015/094138
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English (en)
Chinese (zh)
Inventor
张甘霖
Original Assignee
深圳市博世知识产权运营有限公司
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Publication date
Application filed by 深圳市博世知识产权运营有限公司 filed Critical 深圳市博世知识产权运营有限公司
Priority to PCT/CN2015/094138 priority Critical patent/WO2017079878A1/fr
Publication of WO2017079878A1 publication Critical patent/WO2017079878A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B

Definitions

  • the present invention relates to the field of composite powder manufacturing, and in particular to a method for producing an aluminum oxide or aluminum nitride composite powder.
  • the mixed powder of alumina and aluminum nitride is of great value as a raw material of alumina-aluminum nitride composite ceramic material, alumina-aluminum nitride-aluminum oxynitride composite ceramic material, and aluminum oxynitride transparent ceramic material.
  • the alumina-aluminum nitride composite ceramic has good thermal conductivity under the condition of controlling the content of aluminum nitride, and can be used in the field of high thermal conductivity and expansion coefficient, such as heat dissipation of LED lamps.
  • the aluminum oxynitride transparent ceramic has good optical properties and mechanical properties, and has important national defense value as an armor material.
  • the mixed powder obtained by this method is not highly active in the subsequent sintering into a ceramic, and it is difficult to obtain a high quality ceramic.
  • Another way is to nitride the nano-alumina powder and the nano-carbon powder in nitrogen to obtain a composite powder of aluminum oxide and aluminum nitride.
  • the raw material of this method is readily available, and the obtained composite powder of alumina and aluminum nitride is also more favorable for sintering.
  • this method has the disadvantage that the degree of reaction is susceptible to reaction conditions such as nitrogen pressure and flow rate, reaction temperature and reaction time, alumina powder and particle size of carbon powder. Therefore, it is difficult to control the content of aluminum nitride.
  • the present invention provides a method for producing an alumina or aluminum nitride composite powder which can accurately control the aluminum nitride content.
  • a method for producing an alumina or aluminum nitride composite powder wherein the alumina and aluminum nitride composite powder are obtained by oxidizing a mixed powder of alumina and carbon powder in flowing nitrogen gas and then oxidizing.
  • the nano-alumina powder has a particle diameter of 50 to 500 nm, preferably 50 to 100 nm.
  • the nanocarbon powder has a particle diameter of 50 to 500 nm, preferably 50 to 200 nm.
  • the nano-alumina powder with mass Mo is weighed and mixed with a certain amount of nano-carbon powder.
  • the mixed powder is placed in flowing nitrogen at 1100 ° C - 1500 ° C for 4-6 hours to obtain oxidation of residual carbon.
  • the mixed powder of the carbon-containing alumina and aluminum nitride is heated to 500 ° C - 700 ° C in air and kept for 3-5 hours to obtain a mixed powder of carbon-free alumina and aluminum nitride. And weigh out its quality as M.
  • the content of aluminum nitride in the mixed powder was 4.1 ⁇ (Mo-M)/M ⁇ 100%.
  • the aluminum nitride aluminum nitride composite powder having an aluminum nitride mass content of w (w ⁇ 4.1 ⁇ (Mo-M)/M ⁇ 100%) is preliminarily obtained, the above aluminum nitride content may be 4.1 ⁇ (Mo-M).
  • the /M ⁇ 100% mixed powder was obtained by uniformly mixing with 4.1 ⁇ (Mo-M)/wM alumina.
  • the method of the present invention is simple and does not require strict control of the reaction conditions. It is also possible to obtain a highly reactive alumina aluminum nitride composite powder without expensive imported aluminum nitride powder. Further, any powder having an aluminum nitride content of between 0% and 100% can be obtained by controlling the nitriding reaction conditions.
  • the mass of the nano-alumina powder weighed is represented by Mo
  • the mass of the mixed powder of the obtained carbon-free alumina and aluminum nitride is represented by M
  • w represents the mass content of the pre-obtained aluminum nitride.
  • 500 g of the alumina powder having a particle diameter of 100 nm was uniformly mixed with carbon having a particle diameter of 200 nm, wherein the mass percentage of the carbon powder was 10%.
  • the obtained mixed powder was kept at 1200 ° C for 4 hours in flowing nitrogen gas to obtain a mixed powder of alumina and aluminum nitride containing residual carbon.
  • the mixed powder was kept in air at 500 ° C for 5 hours to obtain a mixed powder of alumina and aluminum nitride, and the mass was 480 g. According to 4.1 ⁇ (Mo-M)/M ⁇ 100%, the content of aluminum nitride was 17.08%.
  • 500 g of the alumina powder having a particle diameter of 200 nm was uniformly mixed with carbon having a particle diameter of 100 nm, wherein the mass percentage of the carbon powder was 20%.
  • the obtained mixed powder was kept at 1200 ° C for 5 hours in flowing nitrogen to obtain a mixed powder of alumina and aluminum nitride containing residual carbon.
  • the mixed powder was kept in air at 600 ° C for 5 hours to obtain a mixed powder of alumina and aluminum nitride, and the mass was 450 g. According to 4.1 ⁇ (Mo-M)/M ⁇ 100%, the content of aluminum nitride was 41%.
  • the powder is uniformly mixed with 183 g of the 200 nm alumina powder according to 4.1 ⁇ (Mo-M)/wM. Available.
  • alumina powder having a particle diameter of 50 nm was uniformly mixed with carbon having a particle diameter of 50 nm, wherein the mass percentage of the carbon powder was 30%.
  • the obtained mixed powder was kept at 1300 ° C for 6 hours in flowing nitrogen to obtain a mixed powder of alumina and aluminum nitride containing residual carbon.
  • This mixed powder was kept in air at 600 ° C for 5 hours to obtain a mixed powder of alumina and aluminum nitride, and the mass was 400 g. According to 4.1 ⁇ (Mo-M)/M ⁇ 100%, the content of aluminum nitride was 82%.

Abstract

L'invention concerne un procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium. La poudre composite d'oxyde d'aluminium et de nitrure d'aluminium est préparée au moyen d'une incubation d'un mélange de poudres, constitué par de l'oxyde d'aluminium et une poudre de carbone, dans de l'azote fluide, puis d'une oxydation du mélange de poudres. Le procédé est simple et ne nécessite pas de régulation stricte des conditions de réaction. Au moyen du procédé, une poudre composite hautement réactive d'oxyde d'aluminium et de nitrure d'aluminium peut être préparée, sans poudre de nitrure d'aluminium coûteuse importée. De plus, n'importe quelle poudre présentant une teneur en nitrure d'aluminium de 0 % à 100 % peut être préparée par régulation des conditions de réaction de carbonisation et de nitruration.
PCT/CN2015/094138 2015-11-09 2015-11-09 Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium WO2017079878A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/094138 WO2017079878A1 (fr) 2015-11-09 2015-11-09 Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/094138 WO2017079878A1 (fr) 2015-11-09 2015-11-09 Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium

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WO2017079878A1 true WO2017079878A1 (fr) 2017-05-18

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PCT/CN2015/094138 WO2017079878A1 (fr) 2015-11-09 2015-11-09 Procédé pour la préparation d'une poudre composite d'oxyde d'aluminium et de nitrure d'aluminium

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WO (1) WO2017079878A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11033195B2 (en) 2015-11-10 2021-06-15 United Arab Emirates University Piezoelectric related apparatus and method for extracting cardiac cycle features from respiration signals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077111A (ja) * 1983-10-05 1985-05-01 Tokuyama Soda Co Ltd 窒化アルミニウム粉末の製造方法
EP0176737B1 (fr) * 1984-09-28 1989-08-09 Kabushiki Kaisha Toshiba Procédé pour la fabrication de poudre de nitrure d'aluminium permettant un frittage aisé
WO1996020127A1 (fr) * 1994-12-23 1996-07-04 The Dow Chemical Company Poudres de nitrure d'aluminium a masse volumique a cru elevee et procede pour les obtenir
CN1874973A (zh) * 2003-10-29 2006-12-06 住友电气工业株式会社 陶瓷复合材料及其制造方法
CN105347779A (zh) * 2015-10-26 2016-02-24 西宁科进工业设计有限公司 一种氧化铝、氮化铝复合粉体的制造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077111A (ja) * 1983-10-05 1985-05-01 Tokuyama Soda Co Ltd 窒化アルミニウム粉末の製造方法
EP0176737B1 (fr) * 1984-09-28 1989-08-09 Kabushiki Kaisha Toshiba Procédé pour la fabrication de poudre de nitrure d'aluminium permettant un frittage aisé
WO1996020127A1 (fr) * 1994-12-23 1996-07-04 The Dow Chemical Company Poudres de nitrure d'aluminium a masse volumique a cru elevee et procede pour les obtenir
CN1874973A (zh) * 2003-10-29 2006-12-06 住友电气工业株式会社 陶瓷复合材料及其制造方法
CN105347779A (zh) * 2015-10-26 2016-02-24 西宁科进工业设计有限公司 一种氧化铝、氮化铝复合粉体的制造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11033195B2 (en) 2015-11-10 2021-06-15 United Arab Emirates University Piezoelectric related apparatus and method for extracting cardiac cycle features from respiration signals

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