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首页> 外文期刊>Journal of the American Ceramic Society >Hydrolysis Control of AlN Powders for the Aqueous Processing of Spherical AlN Granules
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Hydrolysis Control of AlN Powders for the Aqueous Processing of Spherical AlN Granules

机译:球形AlN颗粒水加工AlN粉体的水解控制。

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摘要

Spherical granules of aluminum nitride (AlN) with an average particle size of about 50 μm were produced from aqueous suspensions using an AlN powder surface treated against hydrolysis with aluminum dihydrogenphosphate [A1(H_2PO_4)_3]. Two different amounts of A1(H_2PO_4)_3 were tested and the effects of surface treatment and aging time were evaluated by various techniques (XRD, TG-DTA, zeta potential and pH measurements). The treated powder exhibited antihydrolytic property and good dispersing behavior, enabling the preparation of low-viscosity and high-concentration aqueous AlN slurries for freeze granulation. The spherical AlN granules were sintered in a boron nitride (BN) powder bed followed by ultrasonic washing of the AlN granulates/BN mixture to remove BN. The sintered spherical AlN granules present excellent crystallinity and high sphericity as observed from SEM micrographs.
机译:使用经磷酸二氢铝[A1(H_2PO_4)_3]水解处理的AlN粉末,从水性悬浮液中制得平均粒径约为50μm的氮化铝(AlN)球形颗粒。测试了两种不同量的A1(H_2PO_4)_3,并通过各种技术(XRD,TG-DTA,ζ电位和pH测量)评估了表面处理和老化时间的影响。处理后的粉末显示出抗水解性能和良好的分散性能,从而能够制备用于冷冻制粒的低粘度和高浓度的AlN水性浆料。球形AlN颗粒在氮化硼(BN)粉末床中烧结,然后超声清洗AlN颗粒/ BN混合物以去除BN。从SEM显微图观察,烧结的球形AlN颗粒具有优异的结晶度和高球形度。

著录项

  • 来源
    《Journal of the American Ceramic Society》 |2013年第5期|1383-1389|共7页
  • 作者单位

    State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

    Department of Mechanical Engineering and Industrial Management, FEUP, University of Porto, Porto 4200-465, Portugal;

    Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, Aveiro 3810-193, Portugal;

    State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

    State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

    State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

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  • 正文语种 eng
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