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307 条记录 (耗时 0.038 秒)

    Fabrication method for ceramic core of a dental prosthesis
    32.
    发明授权
    Fabrication method for ceramic core of a dental prosthesis 失效
    牙科假体的陶瓷芯的制造方法

    公开(公告)号：US5776382A

    公开(公告)日：1998-07-07

    申请号：US850322

    申请日：1997-05-02

    申请人： Dae Joon Kim ,  Myung Hyun Lee

    发明人： Dae Joon Kim ,  Myung Hyun Lee

    IPC分类号： A61C5/77 ,  A61C13/00 ,  A61C13/083 ,  A61K6/02 ,  A61K6/06 ,  C04B35/00 ,  C04B35/111 ,  C04B35/119 ,  C04B35/443 ,  C04B35/622 ,  C04B35/80 ,  A61C16/00

    CPC分类号： C04B35/803 ,  A61C13/0003 ,  A61K6/0008 ,  A61K6/0215 ,  A61K6/024 ,  A61K6/025 ,  A61K6/0255 ,  A61K6/083 ,  C04B35/111 ,  C04B35/119 ,  C04B35/443 ,  C04B35/62218

    摘要： An improved method for simplifying a slip casting applied conventional all ceramic core molding process by molding an all ceramic core from a ceramic sheet. In the method, there is prepared a slurry which consists mainly of alumina, spinel, alumina/zirconia powder, by adding thereto a dispersant, a binding agent, a plasticizer, a solvent and the like. The slurry is formed into a sheet having a thickness of 0.1 mm to 1.0 mm for thereby fabricating a tooth molding mass by using a heat hydrostatic pressing at a pressure of 15 Kgf/cm.sup.2 to 150 Kgf/cm.sup.2 at a temperature of 50.degree. C. to 110.degree. C., with slurry composition for fabricating an all ceramic jacket crown applicable to an artificial crown.

    摘要翻译： 通过从陶瓷片成型全陶瓷芯，简化了滑动铸造的改进方法，应用常规的所有陶瓷芯成型工艺。 在该方法中，通过添加分散剂，粘合剂，增塑剂，溶剂等，制备主要由氧化铝，尖晶石，氧化铝/氧化锆粉末组成的浆料。 将浆料形成为厚度为0.1mm至1.0mm的片材，从而通过使用在50kgf / cm 2至150kgf / cm 2的压力下的热静水压力在50℃的温度下制造牙齿成型物质。 至110℃，具有用于制造适用于人造冠的全陶瓷护套顶盖的浆料组合物。

    Zirconia and zirconia composite ceramic shafts for gear micropumps and method of making same
    33.
    发明授权
    Zirconia and zirconia composite ceramic shafts for gear micropumps and method of making same 失效
    用于齿轮微型泵的氧化锆和氧化锆复合陶瓷轴及其制造方法

    公开(公告)号：US5762485A

    公开(公告)日：1998-06-09

    申请号：US709426

    申请日：1996-09-06

    申请人： Syamal K. Ghosh ,  Dilip K. Chatterjee ,  David Alan Ash

    发明人： Syamal K. Ghosh ,  Dilip K. Chatterjee ,  David Alan Ash

    IPC分类号： F04C2/18 ,  C04B35/119 ,  C04B35/486 ,  F04C2/08 ,  F04C13/00 ,  F04C15/00

    CPC分类号： C04B35/486 ,  C04B35/119 ,  F04C13/00 ,  F04C2/082 ,  F04C2240/60 ,  F05C2203/0895

    摘要： An improved gear micropump (10) for delivering corrosive materials, particularly photographic materials, such as dyes and emulsions, has a pair of intermeshing gears (16,18) rotatably mounted on zirconia ceramic shafts (24,26). The ceramic shafts of the invention may be formed from zirconia and zirconia composite materials. The gear micropump (10) having the zirconia ceramic shafts (24,26) eliminates pulsation during fluid delivery and is resistant to wear and abrasion. Moreover the zirconia ceramic shafts (24,26) are strongly resistant to chemicals like photographic emulsions and dyes and, therefore, do not contaminate product with corrosive materials.

    摘要翻译： 用于输送腐蚀性材料，特别是照相材料（例如染料和乳液）的改进的齿轮微型泵（10）具有可旋转地安装在氧化锆陶瓷轴（24,26）上的一对相互啮合的齿轮（16,18）。 本发明的陶瓷轴可以由氧化锆和氧化锆复合材料形成。 具有氧化锆陶瓷轴（24,26）的齿轮微型泵（10）消除流体输送期间的脉动并且耐磨损和磨损。 此外，氧化锆陶瓷轴（24,26）对照相乳液和染料等化学品具有很强的抵抗力，因此不会产生腐蚀性物质的污染。

    Zirconia based ceramic material
    34.
    发明授权
    Zirconia based ceramic material 失效
    氧化锆基陶瓷材料

    公开(公告)号：US5728636A

    公开(公告)日：1998-03-17

    申请号：US544285

    申请日：1995-10-17

    申请人： Masahiro Nawa ,  Shoichi Nakamoto ,  Keiichi Yamasaki ,  Koichi Niihara ,  Atsushi Nakahira ,  Tohru Sekino

    发明人： Masahiro Nawa ,  Shoichi Nakamoto ,  Keiichi Yamasaki ,  Koichi Niihara ,  Atsushi Nakahira ,  Tohru Sekino

    IPC分类号： C04B35/49 ,  C04B35/119 ,  C04B35/48 ,  C04B35/488

    CPC分类号： C04B35/488 ,  C04B35/119

    摘要： A zirconia based ceramic material having improved and well-balanced mechanical strength and toughness consists essentially of 0.5 to 50 vol % of Al.sub.2 O.sub.3 having an average grain size of 2 .mu.m or less and the balance of a partially stabilized zirconia having an average grain size of 5 .mu.m or less. The partially stabilized zirconia consists essentially of 8 to 12 mol % of CeO.sub.2, 0.05 to 4 mol % of TiO.sub.2 and the balance of ZrO.sub.2. Fine Al.sub.2 O.sub.3 grains having an average grain size of 1 .mu.m or less are dispersed within the grains of the partially stabilized zirconia at a dispersion ratio. The dispersion ratio is defined as a ratio of the number of Al.sub.2 O.sub.3 grains dispersed within the grains of the partially stabilized zirconia relative to the number of the entire Al.sub.2 O.sub.3 grains dispersed in the ceramic material, and at least 2% in the present invention. The ceramic material can be made by the following process. A first constituent formed of the partially stabilized zirconia is mixed with a second constituent formed of Al.sub.2 O.sub.3 to obtain a mixture. The mixture is molded into a desired shape, and then sintered in the air under an atmospheric pressure to obtain the ceramic material.

    摘要翻译： 具有改善的良好平衡的机械强度和韧性的氧化锆基陶瓷材料基本上由平均粒径为2μm或更小的0.5至50vol％的Al 2 O 3组成，平均晶粒尺寸为 5亩以下。 部分稳定的氧化锆基本上由8〜12mol％的CeO 2，0.05〜4mol％的TiO 2和余量的ZrO 2组成。 平均粒径为1μm以下的细Al​​ 2 O 3粒子以分散比分散在部分稳定化的氧化锆的晶粒内。 分散比定义为分散在部分稳定的氧化锆的晶粒内的Al 2 O 3颗粒的数量相对于分散在陶瓷材料中的整个Al 2 O 3颗粒的数量的比率，并且在本发明中至少为2％。 陶瓷材料可以通过以下方法制成。 由部分稳定的氧化锆形成的第一组分与由Al 2 O 3形成的第二组分混合以获得混合物。 将混合物成型为所需形状，然后在大气压下在空气中烧结，得到陶瓷材料。

    Silicon carbide whisker reinforced cutting tool material
    35.
    发明授权
    Silicon carbide whisker reinforced cutting tool material 失效
    碳化硅晶须增强切削刀具材料

    公开(公告)号：US5449647A

    公开(公告)日：1995-09-12

    申请号：US246135

    申请日：1994-05-19

    申请人： Gunnar Brandt

    发明人： Gunnar Brandt

    IPC分类号： C04B35/81 ,  C04B35/119 ,  C04B35/80 ,  C04B35/117 ,  C04B35/577

    CPC分类号： C04B35/803 ,  C04B35/119

    摘要： There is now provided an oxide based ceramic cutting insert for chipforming machining of heat resistant alloys comprising a ceramic oxide based matrix and 5-50% by volume of homogeneously dispersed whiskers of silicon carbide. The whiskers have an average length of 4-7 .mu.m, with substantially all of the whiskers having a length less than 10 .mu.m.

    摘要翻译： 现在提供了一种氧化物基陶瓷切削刀片，用于对包含基于陶瓷氧化物的基体和5-50体积％的均匀分散的碳化硅晶须的耐热合金的芯片成型加工。 晶须的平均长度为4-7μm，基本上所有的晶须长度小于10m。

    Alumina sintered body
    36.
    发明授权
    Alumina sintered body 失效
    氧化铝烧结体

    公开(公告)号：US5279886A

    公开(公告)日：1994-01-18

    申请号：US645870

    申请日：1991-01-25

    申请人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Harumi Aiba

    发明人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Harumi Aiba

    IPC分类号： C04B35/111 ,  C04B35/119 ,  H01C7/00 ,  H05B3/14 ,  H05B3/28 ,  C01F17/00

    CPC分类号： H05B3/283 ,  C04B35/119 ,  H05B3/14 ,  Y10S428/901 ,  Y10T428/24917 ,  Y10T428/24926

    摘要： The present invention provides an improved alumina sintered body on which a heater electrode is printed and which is sintered simultaneously with the heater electrode at temperatures lower than the optimum value 1,520.degree. C. The alumina sintered body includes high purity of alumina and 2 through 18% by weight partially stabilized zirconia, which further contains 2 through 6 mole percent solid solution of an oxide or oxides selected from Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, and lanthanum series metal oxides. The high purity of alumina may contain 0.1% by weight alkaline metals and/or alkaline earth metals and 1.0% by weight SiO.sub.2 at most. In the alumina sintered body of the invention, segregation and migration of impurities and chipping are effectively prevented and hence the durability of the sintered body is highly improved. Use of the alumina sintered body of the invention as a heater base makes the durability of a heater much longer.

    摘要翻译： 本发明提供了一种改进的氧化铝烧结体，其上印刷有加热器电极，并且在低于最佳值1520℃的温度下与加热器电极同时烧结。氧化铝烧结体包括高纯度的氧化铝和2至18％ 其还含有选自Y 2 O 3，Sc 2 O 3和镧系金属氧化物的氧化物或氧化物的2〜6摩尔％固溶体的部分稳定化的氧化锆。 氧化铝的高纯度最多可以含有0.1重量％的碱金属和/或碱土金属和1.0重量％的SiO 2。 在本发明的氧化铝烧结体中，有效地防止了杂质的偏析和迁移，并且因此高度提高了烧结体的耐久性。 使用本发明的氧化铝烧结体作为加热器基座使得加热器的耐久性更长。

    Al.sub.2 O.sub.3 based ceramic
    37.
    发明授权
    Al.sub.2 O.sub.3 based ceramic 失效
    Al2O3基陶瓷

    公开(公告)号：US5275981A

    公开(公告)日：1994-01-04

    申请号：US932195

    申请日：1992-08-20

    申请人： Akio Nishiyama ,  Takashi Koyama ,  Yasutaka Aikawa ,  Hideo Ohshima ,  Yuichiro Terao ,  Munenori Kato ,  Akio Sakai

    发明人： Akio Nishiyama ,  Takashi Koyama ,  Yasutaka Aikawa ,  Hideo Ohshima ,  Yuichiro Terao ,  Munenori Kato ,  Akio Sakai

    IPC分类号： B23B27/14 ,  C04B35/111 ,  C04B35/117 ,  C04B35/119 ,  C04B35/56 ,  C04B35/58

    CPC分类号： C04B35/111 ,  B23B27/148 ,  C04B35/117 ,  C04B35/119

    摘要： There is disclosed an Al.sub.2 O.sub.3 based ceramic which includes 5% to 50% by weight of a hard dispersed phase of at least one compound selected from metal carbide, metal nitride, metal carbonitride, metal oxy-carbide, metal oxy-nitride and metal carbo-oxy-nitride. The compound is represented by M(CNO), wherein M is at least one metal selected from the group consisting of Ti, Zr and Hf. The ceramic optionally contains 1% to 25% by weight of ZrO.sub.2, and balance Al.sub.2 O.sub.3 matrix, which contains an additive dissolved in the Al.sub.2 O.sub.3 grains so as to form solid solution therewith. The additive is contained in an amount of 0.01% to 12% by weight with respect to the Al.sub.2 O.sub.3 matrix and is at least one oxide of an element selected from the group consisting of Y, Mg, Cr, Ni, Co, and rare earth elements. The Al.sub.2 O.sub.3 grains have an average grain size no larger than 1.0 .mu. m while the hard phase constituent has an average grain size no larger than 0.6 .mu. m.

    摘要翻译： 公开了一种Al 2 O 3系陶瓷，其包含5重量％至50重量％的硬分散相的至少一种选自金属碳化物，金属氮化物，金属碳氮化物，金属氧化碳，金属氮化物和金属碳氮化物的化合物， 氧氮化物。 该化合物由M（CNO）表示，其中M是选自Ti，Zr和Hf中的至少一种金属。 陶瓷任选含有1重量％至25重量％的ZrO 2，并且余量为Al 2 O 3基质，其含有溶解在Al 2 O 3颗粒中的添加剂以便与其形成固溶体。 相对于Al 2 O 3基质，添加剂的含量为0.01〜12重量％，是选自Y，Mg，Cr，Ni，Co和稀土元素中的至少一种元素的氧化物 。 Al 2 O 3粒子的平均粒径不大于1.0（my）m，而硬相成分的平均粒径不大于0.6（my）m。

    Zirconia base ceramics
    40.
    发明授权
    Zirconia base ceramics 失效
    氧化锆基陶瓷

    公开(公告)号：US4820666A

    公开(公告)日：1989-04-11

    申请号：US842496

    申请日：1986-03-21

    申请人： Masanori Hirano ,  Hiroshi Inada

    发明人： Masanori Hirano ,  Hiroshi Inada

    IPC分类号： C04B35/119 ,  C04B35/488 ,  C04B35/48

    CPC分类号： C04B35/4885 ,  C04B35/119

    摘要： The invention consists of zirconia base with high hydrothermal stability which:(a) consists essentially of at least 40 weight % of partially stabilized zirconia of the ZrO.sub.2 -Y.sub.2 O.sub.3 -CeO.sub.2 system wherein the proportion of ZrO.sub.2, Y.sub.2 O.sub.3, and CeO.sub.2 is within the range defined by the line connecting points F, G, L, M, N and K in a ternary diagram (ZrO.sub.2, YO.sub.1.5, CeO.sub.2), the vertices of said points being given by the following molar % of ZrO.sub.2, YO.sub.1.5, and CeO.sub.2, respectively:F (88, 10, 2),G (89, 10, 1),L (93.5, 4, 2.5),M (93, 2, 5),N (88, 1, 11), andK (86, 1,13),and 3 to 60 weight % of at least one of Al.sub.2 O.sub.3, MgO.Al.sub.2 O.sub.3, spinel and mullite, and(b) has a mean crystal grain size not exceeding 2 micrometers and a bending strength of at least 100 kgf/mm.sup.2, said ZrO.sub.2 containing a minimum of 50 volume % tetragonal crystal structure and a maximum of 5 volume % monoclinic crystal structure when tested in steam of 180.degree. C. and 10 atm for 10 hours. The monoclinic crystal structure does not exceed 5 volume % when tested in an atmosphere of 300.degree. C. for 3000 hours. These zirconia base ceramics are stable in the presence of moisture under low temperatures of approximately 200.degree.-400.degree. C.

    摘要翻译： 本发明由具有高水热稳定性的氧化锆碱组成，其中：（a）基本上由至少40重量％的ZrO 2 -Y 2 O 3 -TeO 2体系的部分稳定的氧化锆组成，其中ZrO 2，Y 2 O 3和CeO 2的比例在所限定的范围内 通过在三元图（ZrO 2，YO 1.5，CeO 2）中连接点F，G，L，M，N和K的线，所述点的顶点由以下摩尔％的ZrO 2，YO 1.5和 CeO 2分别为：​​F（88,10,2），G（89,10,1），L（93.5,4,2.5），M（93,2,5），N（88,1,11）和 K（86,1.13）和3〜60重量％的Al 2 O 3，MgO·Al 2 O 3，尖晶石和莫来石中的至少一种，（b）的平均结晶粒径不超过2微米， 至少100kgf / mm2，当在180℃和10atm的蒸汽中测试10小时时，所述ZrO 2含有至少50体积％的四方晶体结构和最多5体积％的单斜晶体结构。 当在300℃的气氛中测试3000小时时，单斜晶体结构不超过5体积％。 这些氧化锆基陶瓷在约200-400℃的低温下在水分存在下是稳定的。