公开(公告)号：US4977114A

公开(公告)日：1990-12-11

申请号：US438946

申请日：1989-11-17

申请人： Kazuo Horinouchi ,  Katsuya Maeda

发明人： Kazuo Horinouchi ,  Katsuya Maeda

IPC分类号： C04B35/48 ,  C04B35/486

CPC分类号： C04B35/486

摘要： Disclosed are zirconia ceramics superior in mechanical strength, hardness and toughness and a method for producing them. The zirconia ceramics contain ca. 7-12 mol % of cerium oxide and ca. 2-7 mol % of magnesium oxide and have an average crystal grain size of crystal grains thereof of 1 .mu.m or less, at least ca. 80 mol % of the crystal grains being tetragonal grains and the balance being monoclinic grains, and have a bending strength of at least 100 kg/mm.sup.2, a fracture toughness of at least 10 MNm.sup.-1.5 and a Vickers hardness of at least 1000 kg/mm.sup.2. The method comprises calcining a hydrate obtained by coprecipitation method from water-soluble salts of cerium and magnesium and a basic salt of zirconium or a hydrate obtained by adding water-soluble salts of cerium and magnesium to a zirconium hydrate and neutralizing the mixture of hydrates, further grinding the calcined hydrate to obtain zirconia powders of 1 .mu.m or less in average crystal grain size, then shaping the powders and sintering the resulting shaped product.

摘要翻译： 公开了机械强度，硬度和韧性优异的氧化锆陶瓷及其制造方法。 氧化锆陶瓷含有 7-12摩尔％的氧化铈和约 2-7mol％的氧化镁，其晶粒的平均晶粒尺寸为1μm以下，至少约为。 80μmol％的晶粒为四方晶粒，余量为单斜晶粒，弯曲强度为至少100kg / mm2，断裂韧性为至少10MNm-1.5，维氏硬度至少为1000kg / mm2。 该方法包括通过共沉淀法从铈和镁的水溶性盐和通过向水合锆中加入铈和镁的水溶性盐而得到的锆或水合物的碱式盐，并且中和水合物的混合物， 进一步研磨煅烧水合物，得到平均晶粒尺寸为1μm以下的氧化锆粉末，然后成形粉末并烧结所得成型体。

公开(公告)号：US4260524A

公开(公告)日：1981-04-07

申请号：US42151

申请日：1979-05-24

申请人： Koichi Yamada ,  Kunio Nakazato ,  Kazuo Horinouchi ,  Seiichi Hamano ,  Masahide Mouri

发明人： Koichi Yamada ,  Kunio Nakazato ,  Kazuo Horinouchi ,  Seiichi Hamano ,  Masahide Mouri

IPC分类号： B01J21/04 ,  B01J35/04

CPC分类号： B01J21/04

摘要： A hollow catalyst carrier and hollow catalyst made of a transition-alumina (e.g. .gamma.-alumina) which comprises a calcined product having a pipe-like or multi-cell structure and having a very large void ratio (i.e. not less than 3%), a very large specific surface area (i.e. not less than 5 m.sup.2 /g), a bulk density of 0.8 to 1.8 g/cm.sup.3, a compressive strength in the extrusion direction of not less than 20 kg/cm.sup.2 and at least one hole in the extrusion direction, and a process for the production thereof by subjecting a powder containing a rehydratable alumina to an extrusion molding, rehydrating the molded product and followed by calcining. The hollow catalyst carrier and hollow catalyst have excellent properties for carrying the catalytically active components thereon and have an excellent mechanical strength.

摘要翻译： 由过渡氧化铝（例如γ-氧化铝）制成的中空催化剂载体和中空催化剂，其包括具有管状或多电池结构并且具有非常大的空隙率（即不小于3％）的煅烧产物， 非常大的比表面积（即不小于5m 2 / g），堆积密度为0.8至1.8g / cm 3，挤出方向的抗压强度不小于20kg / cm2，以及至少一个孔 挤出方向，以及通过使含有可再水合氧化铝的粉末进行挤出成型，再水合成型品，然后煅烧而制造的方法。 中空催化剂载体和中空催化剂具有优异的载体上的催化活性组分的性能并且具有优异的机械强度。

公开(公告)号：US4173518A

公开(公告)日：1979-11-06

申请号：US845287

申请日：1977-10-25

申请人： Koichi Yamada ,  Tadanori Hashimoto ,  Kazuo Horinouchi

发明人： Koichi Yamada ,  Tadanori Hashimoto ,  Kazuo Horinouchi

IPC分类号： C25C3/12 ,  C25C3/06 ,  C25B11/04 ,  C25C7/02

CPC分类号： C25C3/12

摘要： An electrode for aluminum reduction cells wherein an electrode base, at least in that portion which is brought into contact with a molten salt bath, is coated with a composition comprising at least 50% by weight of electronic conductive oxide ceramics, or said portion of the electrode is made of said composition.

摘要翻译： 一种用于铝还原电池的电极，其中至少在与熔融盐浴接触的部分中的电极基底涂覆有包含至少50重量％的电子导电氧化物陶瓷的组合物或所述部分 电极由所述组合物制成。

公开(公告)号：US5068072A

公开(公告)日：1991-11-26

申请号：US448284

申请日：1989-12-11

申请人： Kazuo Horinouchi ,  Masahide Mouri ,  Isao Kameda

发明人： Kazuo Horinouchi ,  Masahide Mouri ,  Isao Kameda

IPC分类号： C04B35/58 ,  C04B35/48 ,  C04B35/49 ,  H01B1/08

CPC分类号： H01B1/08 ,  C04B35/49

摘要： The present invention relates to a zirconia-based sintered body comprising TiN, TiO.sub.2 and ZrO.sub.2 and having electric conductivity and a process for the production thereof. The present invention provides a zirconia-based sintered body which has, at normal temperature, a mechanical strength of not less than 50 kg/mm.sup.2, a fracture toughness of not less than 4 MPam.sup.1/2, a Vickers hardness of not less than 1,000 kg/mm.sup.2 and a volume resistivity of not more than 1 .OMEGA.cm, and which is sinterable under normal pressure at low temperature, and a process for the production thereof.

公开(公告)号：US4039401A

公开(公告)日：1977-08-02

申请号：US658032

申请日：1976-02-13

申请人： Koichi Yamada ,  Tadanori Hashimoto ,  Kazuo Horinouchi

发明人： Koichi Yamada ,  Tadanori Hashimoto ,  Kazuo Horinouchi

IPC分类号： C25C3/06 ,  C25C3/12 ,  C25C7/02

CPC分类号： C25C3/12 ,  C25C3/06

摘要： An electrode for aluminum reduction cells wherein an electrode base at least in its portion that is brought into contact with a molten salt bath is coated with a composition comprising at least 50% by weight of electronic conductive oxide ceramics, or said portion of the electrode is made of said composition.

摘要翻译： 一种用于铝还原电池的电极，其中至少在其与熔融盐浴接触的部分中的电极基底涂覆有包含至少50重量％的电子导电氧化物陶瓷的组合物，或者所述电极的所述部分是 由所述组合物制成。