METHOD FOR MANUFACTURING TRANSPARENT POLYCRYSTALLINE ALUMINUM OXYNITRIDE
    45.
    发明申请
    METHOD FOR MANUFACTURING TRANSPARENT POLYCRYSTALLINE ALUMINUM OXYNITRIDE 审中-公开
    制造透明多晶铝氧化物的方法

    公开(公告)号:WO2008047955A1

    公开(公告)日:2008-04-24

    申请号:PCT/KR2006/004184

    申请日:2006-10-16

    摘要: The present invention relates to a method of manufacturing a transparent polycrystalline aluminum oxynitride. Aluminum oxynitride manufactured by prior art methods has a great number of porosities therein and thus has low transparency. The present invention is directed to solving such a problem. In the method of manufacturing aluminum oxynitride of the present invention, a sintering additive added to a source powder includes less than 0.5wt.% MgO. Further, the source powder is presintered at 1550 °C to 1750 °C so that a relative density becomes 95% or more and is then resintered at 1900 °C or more so that a relative density higher than that of presintering can be accomplished. According to the present invention, a cubic-phased polycrystalline aluminum oxynitride ceramic can be obtained, wherein porosities therein are nearly eliminated and its substantial transparency becomes 95% or more.

    摘要翻译: 本发明涉及一种制造透明多晶氮氧化铝的方法。 通过现有技术制造的氮氧化铝在其中具有大量的孔隙率,因此具有低透明度。 本发明旨在解决这个问题。 在制造本发明的氮氧化铝的方法中,添加到源粉末中的烧结添加剂包括小于0.5重量%的MgO。 此外,源粉末在1550℃至1750℃下预烧结,使得相对密度达到95%以上,然后在1900℃以上重结晶,从而可以实现比预烧结更高的相对密度。 根据本发明,可以获得立方相多晶氮氧化铝陶瓷,其中几乎消除了其中的孔隙率,并且其实质的透明度变为95%以上。

    高圧放電灯用発光容器及び多結晶透明アルミナ焼結体の製造方法
    47.
    发明申请
    高圧放電灯用発光容器及び多結晶透明アルミナ焼結体の製造方法 审中-公开
    高压放电灯的发光案例及多晶透明铝烧结制品的制备方法

    公开(公告)号:WO2003075312A1

    公开(公告)日:2003-09-12

    申请号:PCT/JP2002/002114

    申请日:2002-03-07

    发明人: 浅野 修

    IPC分类号: H01J61/30

    摘要: A method for preparing a polycrystalline transparent alumina sintered article, which comprises admixing an alumina having a purity of 99.9 % or higher with MgO in the range of 0.002 to 0.010 wt % and La2O3 in the range of 0.005 to 0.020 wt % in a manner such that the sum of MgO and La2O3 is 0.030 wt % or less and the relationship: 0.2

    摘要翻译: 一种多晶透明氧化铝烧结体的制造方法,其特征在于,将纯度为99.9%以上的氧化铝与0.002〜0.010重量%的MgO和0.005〜0.020重量%的La2O3以0.005〜0.020重量%的比例混合, MgO和La 2 O 3的总和为0.030重量%以下,并且满足关系:0.2 <= MgO / La 2 O 3 <= 0.5,在900〜1200℃下煅烧所得混合物,对煅烧产物进行滑移浇铸, 产物进行螯合处理,并在1650〜1900℃的还原气氛中将螯合物保持1小时以上,从而在常压下进行烧成。 通过该方法制备的多晶透明氧化铝烧结体在用于高压放电块的发光壳体中的烧结助剂的种类和用量方面进行了优化。

    METHOD AND APPARATUS FOR THE PREPARATION OF TRANSPARENT ALUMINA CERAMICS BY MICROWAVE SINTERING
    49.
    发明申请
    METHOD AND APPARATUS FOR THE PREPARATION OF TRANSPARENT ALUMINA CERAMICS BY MICROWAVE SINTERING 审中-公开
    通过微波烧结制备透明氧化铝陶瓷的方法和装置

    公开(公告)号:WO2003011792A1

    公开(公告)日:2003-02-13

    申请号:PCT/US2001/024171

    申请日:2001-08-01

    IPC分类号: C04B35/115

    CPC分类号: C04B35/64 C04B35/115

    摘要: An apparatus (10) for the development of transparent alumina ceramics using microwave energy at the frequency between 0.915 and 2.45 GHz inclusive in hydrogen atmosphere at ambient pressure comprises an enclosed, insulated chamber (14) to retain a workpiece (12) for the application of microwave energy. The chamber comprises a TE 103 single mode or a multimode microwave cavity into which is mounted a quartz tube (18). An insulation material (20), transparent to microwave energy, is positioned within the quartz tube. A port (28) for the introduction of hydrogen penetrates the cavity so that the microwave sintering of the workpiece is performed in an ultra-pure hydrogen atmosphere. The workpiece is preferably mounted on a refractory ceramic such as alumina tube for the microwave sintering process. A method, preferably using the apparatus, develops transparent alumina ceramics and single crystal sapphire.

    摘要翻译: 用于在环境压力的氢气氛中开发使用频率在0.915和2.45GHz之间的微波能量的透明氧化铝陶瓷的装置(10)包括封闭的绝缘室(14),以保持工件(12)用于施加 微波能量。 腔室包括TE103单模或多模微波腔,其中安装有石英管(18)。 对微波能量透明的绝缘材料(20)位于石英管内。 用于引入氢气的端口(28)穿透空腔,使得工件的微波烧结在超纯氢气氛中进行。 工件优选安装在耐火陶瓷如氧化铝管上用于微波烧结过程。 优选使用该装置的方法开发透明氧化铝陶瓷和单晶蓝宝石。