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    • 2. 发明申请
    • CERIA-ZIRCONIA SOLID SOLUTION CRYSTAL FINE PARTICLES AND THEIR PRODUCTION PROCESS
    • CERIA-ZIRCONIA固体溶液水晶微粒及其生产工艺
    • US20100298127A1
    • 2010-11-25
    • US12796492
    • 2010-06-08
    • Yoshihisa BeppuKazuo Sunahara
    • Yoshihisa BeppuKazuo Sunahara
    • B01J21/02B01J23/10
    • C01F17/0043B82Y30/00C01G25/00C01G25/02C01P2002/50C01P2002/72C01P2002/77C01P2004/10C01P2004/16C01P2004/20C01P2004/64C01P2006/12C01P2006/13
    • To provide a process for producing ceria-zirconia solid solution crystal fine particles having high crystallinity, being excellent in uniformity of composition and particle size, having a small particle size and a high specific surface area and being excellent in heat resistance, and such solid solution crystal fine particles.A process comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 5 to 50% of (ZrO2+CeO2), from 10 to 60% of RO (wherein R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba) and from 25 to 70% of B2O3, a step of quenching the melt to obtain an amorphous material, a step of heating the amorphous material at a temperature of from 550 to 1000° C. to precipitate a ceria-zirconia solid solution crystal in the amorphous material, and a step of separating components other than the ceria-zirconia solid solution crystal from the obtained precipitates to obtain the ceria-zirconia solid solution crystal fine particles, in this order.
    • 为了提供具有高结晶度的二氧化铈 - 氧化锆固溶体结晶微粒的制造方法,组成和粒度均匀性优异,粒径小,比表面积小,耐热性优异的固溶体 晶体细颗粒。 一种方法包括以下步骤:获得含有以氧化物为基准的摩尔%为5〜50%的(ZrO 2 + CeO 2),10〜60%的RO(其中,R为至少1种选自 由Mg,Ca,Sr和Ba组成的组)和25〜70%的B 2 O 3,使熔融物淬火以获得无定形材料的步骤,在550〜1000℃的温度下加热无定形材料的工序。 在无定型材料中析出二氧化铈 - 氧化锆固溶体晶体,以及从得到的析出物中分离除二氧化铈 - 氧化锆固溶体结晶以外的成分的工序,得到氧化铈 - 氧化锆固溶体结晶微粒。