专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US5516269A Zirconia vane for rotary compressors 失效
标题翻译：旋转压缩机用氧化锆叶片
公开(公告)号：US5516269A
公开(公告)日：1996-05-14
申请号：US412199
申请日：1995-03-28
申请人： Takao Nishioka , Akira Yamakawa , Matsuo Higuchi , Harutoshi Ukegawa
发明人： Takao Nishioka , Akira Yamakawa , Matsuo Higuchi , Harutoshi Ukegawa
IPC分类号： F04C18/356 , C04B35/48 , F01C21/08 , F01C21/00
CPC分类号： F01C21/0809 , F04C2210/26 , F05C2203/0895
摘要： A zirconia vane used in a rotary compressor, the zirconia vane being formed of a partially stabilized zirconia sintered body containing 92 through 98 molar percent of ZrO.sub.2 and being stabilized with Y.sub.2 O.sub.3, zirconia crystals constituting the zirconia sintered body having a mean grain diameter of 0.1 to 0.6 .mu.m and a maximum grain diameter of not greater than 2 .mu.m, the zirconia sintered body having a mean three-point flexural strength of not less than 120 kg/mm.sup.2 measured in conformity with JIS R1601, a surface of the zirconia sintered body in contact with a rotor of the rotary compressor having a first surface roughness in a direction of rotations of the rotor, specified by a ten-point mean roughness Rz, of not greater than 1 .mu.m and a second surface roughness in a direction perpendicular to the direction of rotation of the rotor, specified by the ten-point mean roughness Rz, of not greater than 0.6 .mu.m. The vane is light-weight and has excellent sliding properties to effectively prevent cohesion and seizure in an atmosphere of a coolant of chlorine-free like an HFC.
摘要翻译：用于旋转压缩机的氧化锆叶片，氧化锆叶片由部分稳定的氧化锆烧结体形成，该氧化锆烧结体含有92至98摩尔％的ZrO 2，并且用Y 2 O 3，构成氧化锆烧结体的氧化锆晶体稳定，其平均粒径为0.1至 0.6μm，最大粒径不大于2μm，氧化锆烧结体的平均三点弯曲强度不小于120kg / mm2，符合JIS R1601，氧化锆烧结体的表面与旋转式压缩机的转子接触，该旋转压缩机的旋转压缩机的转子方向的第一表面粗糙度由十点平均粗糙度Rz指定为不大于1μm，第二表面粗糙度在垂直于由十点平均粗糙度Rz表示的转子的旋转方向不大于0.6μm。叶片重量轻，具有优异的滑动性能，有效地防止了像无卤素这样的无氯冷却剂的气氛中的内聚力和卡滞。

22. 发明授权

US5502011A Silicon nitride sintered body 失效
标题翻译：氮化硅烧结体
公开(公告)号：US5502011A
公开(公告)日：1996-03-26
申请号：US303591
申请日：1994-09-09
申请人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa
发明人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa
IPC分类号： C04B35/597 , C04B35/587 , C04B35/599
CPC分类号： C04B35/597
摘要： A silicon nitride sintered body characterized by comprising crystal grains having a linear density of 60 to 120 per 50 .mu.m length as measured in an arbitrary two-dimensional section of the sintered body. The silicon nitride sintered body has a shock compressive elasticity limit (Hugoniot-elastic limit) of 15 GPa or more and is substantially composed of crystal phases of .alpha.-silicon nitride and .beta.'-sialon. The percentages of the .alpha.-silicon nitride and .beta.'-sialon are not more than 30% and not less than 70%, respectively. The silicon nitride sintered body is particularly excellent in mechanical strengths at room temperature as well as in productivity and cost efficiency and is useful for applications as the material of parts where a particularly high impact strength is required, such as a valve train mechanism for automobile parts.
摘要翻译：一种氮化硅烧结体，其特征在于包括在烧结体的任意二维截面中测得的每50μm长度的线密度为60至120的晶粒。氮化硅烧结体具有15GPa或更高的冲击压缩弹性极限（Hugoniot弹性极限），并且基本上由α-氮化硅和β'塞隆的结晶相组成。 α硅氮化物和β' - 赛隆的百分比分别不超过30％且不小于70％。氮化硅烧结体在室温下的机械强度以及生产率和成本效率方面特别优异，作为需要特别高的冲击强度的部件的材料，例如汽车部件的气门机构。

23. 发明授权

US5234642A High strength silicon nitride sintered body and process for producing same 失效
标题翻译：高强度硅氮化物烧结体及其生产方法
公开(公告)号：US5234642A
公开(公告)日：1993-08-10
申请号：US459398
申请日：1989-12-29
申请人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
发明人： Takao Nishioka , Akira Kuibira , Kenji Matsunuma , Yoshishige Takano , Matsuo Higuchi , Masaaki Honda , Masaya Miyake
IPC分类号： C04B35/597
CPC分类号： C04B35/597
摘要： A high-strength silicon nitride sintered body having a flexural strength of 100 kg/mm.sup.2 or higher and a process for producing the same are disclosed, the sintered body comprising not less than 90% by weight of a single crystalline phase of silicon aluminum oxynitride (Si.sub.6-z Al.sub.2 O.sub.z N.sub.8-z, wherein z is a number of from 0 to 4.2) having an average longer diameter of not more than 5 .mu.m and an aspect ratio of not less than 5, the crystal phase constituting a network structure in the sintered body, the balance being a crystalline or amorphous (glassy) phase comprising one or more of oxides or oxynitrides of a rare earth metal, a group 3A metal, a group 2A metal or Si, and the process comprising mixing silicon nitride powder, an organic metal salt as a first sintering aid, and at least one of a metal oxide, a metal nitride, and a metal oxynitride as a second sintering aid, either separately or as a mixture of two or more thereof, with a solvent and a surface active agent, subjecting the mixture or mixtures to ultrasonic dispersion, mixing the mixtures together followed by drying to obtain a mixed powder, molding the mixed powder, and sintering the molded article at a temperature of from 1,600.degree. to 2,200.degree. C. in a non-oxidative atmosphere.

24. 发明授权

US5204297A Silicon nitride sintered body and process for producing the same 失效
标题翻译：硅氮化物烧结体及其制造方法
公开(公告)号：US5204297A
公开(公告)日：1993-04-20
申请号：US825989
申请日：1992-01-27
申请人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa , Masaya Miyake
发明人： Takehisa Yamamoto , Takao Nishioka , Kenji Matsunuma , Akira Yamakawa , Masaya Miyake
IPC分类号： C04B35/593 , C04B35/597
CPC分类号： C04B35/5935 , C04B35/597
摘要： The present invention relates to a silicon nitride sintered body [wherein the composition of Si.sub.3 N.sub.4 -first aid (Y.sub.2 O.sub.3 +MgO)-second aid (at least one of Al.sub.2 O.sub.3 and AlN)] falls within a range defined by lines joining points A, B, C and D in FIG. 1, the crystal phase of the sintered body contains both .alpha.-Si.sub.3 N.sub.4 and .beta.'-sialon, and the relative density is 98% or more. This sintered body is produced by subjecting a green compact of the above-described source to primary sintering in a nitrogen gas atmosphere at 1300.degree. to 1700.degree. C. so that the relative density reaches 96% or more, and the precipitation ratio of the .alpha.-Si.sub.3 N.sub.4 crystal phases to the .beta.'-sialon crystal phase in the sintered body is in the range of from 40:60 to 80:20; and then subjecting the primary sintered body to secondary sintering in a nitrogen gas atmosphere at 1300.degree. to 1700.degree. C. so that the relative density reaches 98% or more. The sintered body has superior strength properties, especially at ordinary temperatures, and can be produced with a high productivity in a high yield at a low cost.

25. 发明授权

US5173458A Silicon nitride sintered body and process for producing the same 失效
标题翻译：硅氮化物烧结体及其制造方法
公开(公告)号：US5173458A
公开(公告)日：1992-12-22
申请号：US810723
申请日：1991-12-18
申请人： Takao Nishioka , Kenji Matsunuma , Koichi Sogabe , Tomoyuki Awatsu , Masaya Miyake , Takehisa Yamamoto , Akira Yamakawa
发明人： Takao Nishioka , Kenji Matsunuma , Koichi Sogabe , Tomoyuki Awatsu , Masaya Miyake , Takehisa Yamamoto , Akira Yamakawa
IPC分类号： C04B35/593
CPC分类号： C04B35/5935
摘要： Disclosed is a silicon nitride sintered body produced by subjecting a green compact of a mixed powder composed of 1) a silicon nitride powder having a percentage .alpha. crystallization of 93% or more and a mean grain diameter of 0.7 .mu.m or less and 2) 5 to 15% by weight in total of a first sintering aid selected from among rare earth element, yttrium oxide and lanthanide oxides and a second sintering aid consisting of aluminum oxide or nitride and at least one selected from among oxides and nitrides of Mg, Ca and Li, to primary sintering in a nitrogen gas atmosphere under a pressure of 1.1 atm or less at 1500.degree. to 1700.degree. C.; and subjecting the sintered body to secondary sintering in a nitrogen gas atmosphere under a pressure of 10 atm or more at the primary sintering temperature or below, thereby giving a sintered body wherein the relative density of the sintered body is 99% or more and the precipitation ratio of an .alpha.-Si.sub.3 N.sub.4 (including .beta.'-sialon) crystal phase ranges from 1:3 to 1:8 in terms of the peak intensity ratio in X-ray diffraction.

26. 发明授权

US4764490A Process for preparation of sintered silicon nitride 失效
标题翻译：烧结氮化硅的制备方法
公开(公告)号：US4764490A
公开(公告)日：1988-08-16
申请号：US849330
申请日：1986-04-08
申请人： Akira Yamakawa , Masaya Miyake , Takao Nishioka
发明人： Akira Yamakawa , Masaya Miyake , Takao Nishioka
IPC分类号： C04B35/626 , C04B35/584 , C04B35/593 , C04B35/58
CPC分类号： C04B35/584 , C04B35/5935
摘要： Disclosed is a process for preparation of a sintered silicon nitride. The process comprises the steps of:mixing a powder of silicon nitride with a powder of a sintering agent;compacting the obtained mixture; andsintering the compacted mixture in a non-oxidizing atmosphere.The feature of the process is that the powder of the sintering agent includes a powder mixture of oxide and/or hydroxide of at least two kinds of metals which has been prepared by co-precipitation.Due to the use of the co-precipitated powder as the sintering agent, it is possible to obtain a sintered silicon nitride having an excellent strength and uniformity in quality. The obtained sintered silicon nitride is preferably used as an engineering ceramic.
摘要翻译：公开了一种制备氮化硅烧结体的方法。该方法包括以下步骤：将氮化硅粉末与烧结剂粉末混合; 压实得到的混合物; 并在非氧化气氛中烧结压实的混合物。该方法的特征在于，烧结剂的粉末包含通过共沉淀制备的至少两种金属的氧化物和/或氢氧化物的粉末混合物。由于使用共沉淀粉末作为烧结剂，可以获得质量优异的强度和均匀性的烧结氮化硅。得到的烧结氮化硅优选用作工程陶瓷。

27. 发明授权

US08241518B2 Soft magnetic material and dust core 有权
标题翻译：软磁材料和防尘芯
公开(公告)号：US08241518B2
公开(公告)日：2012-08-14
申请号：US12300893
申请日：2007-05-15
申请人： Naoto Igarashi , Takao Nishioka , Yoshiyuki Shimada , Tsuyoshi Akao
发明人： Naoto Igarashi , Takao Nishioka , Yoshiyuki Shimada , Tsuyoshi Akao
IPC分类号： H01F1/26 , C10M129/68
CPC分类号： H01F1/26 , B22F1/0059 , B22F1/02 , B22F3/24 , B22F2998/10 , B22F2999/00 , C22C33/02 , H01F1/24 , H01F1/33 , H01F41/0246 , B22F3/10 , B22F2003/248 , B22F3/20 , B22F3/02 , B22F2201/10 , B22F2201/20
摘要： A soft magnetic material includes a plurality of composite magnetic particles including a metal magnetic particle and an insulating film surrounding a surface of the metal magnetic particle. The insulating film also contains a phosphate. The soft magnetic material further includes an aromatic polyetherketone resin and a metallic soap and/or an inorganic lubricant having a hexagonal crystal structure. The metallic soap and the inorganic lubricant are particles with an average particle size of not more than 2.0 μm.
摘要翻译：软磁性材料包括多个复合磁性颗粒，包括金属磁性颗粒和围绕金属磁性颗粒表面的绝缘膜。绝缘膜也含有磷酸盐。软磁性材料还包括芳族聚醚酮树脂和具有六方晶系结构的金属皂和/或无机润滑剂。金属皂和无机润滑剂是平均粒径不超过2.0μm的颗粒。

28. 发明授权

US07998361B2 Soft magnetic material and powder magnetic core 有权
标题翻译：软磁材料和粉末磁芯
公开(公告)号：US07998361B2
公开(公告)日：2011-08-16
申请号：US10599003
申请日：2005-03-29
申请人： Kazuhiro Hirose , Haruhisa Toyoda , Takao Nishioka , Naoto Igarashi , Toru Maeda , Yoshiyuki Shimada
发明人： Kazuhiro Hirose , Haruhisa Toyoda , Takao Nishioka , Naoto Igarashi , Toru Maeda , Yoshiyuki Shimada
IPC分类号： C04B35/00 , C09D5/23 , H01F1/00 , C01G49/08 , C04B35/26 , C04B35/64
CPC分类号： B22F1/02 , B22F2998/10 , H01F1/24 , H01F1/33 , H01F41/0246 , B22F3/02 , B22F3/24
摘要： A soft magnetic material includes: a plurality of composite magnetic particles formed from a metal magnetic particle and an insulative coating surrounding a surface of the metal magnetic particle and containing metallic salt phosphate and/or oxide; and a lubricant formed as fine particles added at a proportion of at least 0.001 percent by mass and no more than 0.1 percent by mass relative to the plurality of composite magnetic particles. With this structure, superior lubrication is provided during compacting and desired magnetic characteristics can be obtained after compacting.
摘要翻译：软磁性材料包括：多个由金属磁性颗粒形成的复合磁性颗粒和围绕金属磁性颗粒的表面的包含金属盐磷酸盐和/或氧化物的绝缘涂层; 以及相对于多个复合磁性粒子以比例为0.001质量％以上0.1质量％以下的微粒子形成的润滑剂。利用这种结构，在压实过程中提供了优异的润滑，并且在压实后可获得所需的磁特性。

29. 发明申请

US20080102302A1 Method for Producing Dust Core Compact and Dust Core Compact 失效
标题翻译：粉尘芯紧凑型粉尘芯的生产方法
公开(公告)号：US20080102302A1
公开(公告)日：2008-05-01
申请号：US11663305
申请日：2005-09-16
申请人： Kazuhiro Hirose , Haruhisa Toyoda , Atsushi Sato , Takao Nishioka , Yasuhiro Endo , Ryoji Mizutani , Kazutaka Tatematsu , Kenji Harada
发明人： Kazuhiro Hirose , Haruhisa Toyoda , Atsushi Sato , Takao Nishioka , Yasuhiro Endo , Ryoji Mizutani , Kazutaka Tatematsu , Kenji Harada
IPC分类号： B22F3/12 , B22F3/02
CPC分类号： B22F7/06 , B22F1/02 , B22F3/02 , B22F2003/247 , B22F2003/248 , B22F2998/10 , H01F1/24 , H01F41/0246 , Y10T428/12014 , B22F1/0085 , B22F3/10 , B22F3/24
摘要： A method for producing a dust core compact includes the steps of forming a compact component by pressure-forming a soft magnetic powder having an average particle diameter Da under a pressure Pa, and forming a compact by pressure-forming a soft magnetic powder having an average particle diameter Db and the compact component under a pressure Pb. Average particle diameters Da and Db of the soft magnetic powders satisfy relationship Da/Db≧2, and pressures Pa and Pb applied during the pressure-forming satisfy relationship Pa/Pb≦1/2. With this structure, a method for producing a dust core compact exhibiting a high strength and capable of being fabricated even when it has a complex shape, and the dust core compact can be provided.
摘要翻译：制备压粉芯体的方法包括以下步骤：通过在压力Pa下压制形成具有平均粒径Da的软磁性粉末来形成紧凑的部件，并通过压制形成具有平均粒径的软磁性粉末的压块粒径Db和压力Pb下的压实组分。软磁性粉末的平均粒径Da和Db满足关系Da / Db> = 2，压力成形时施加的压力Pa和Pb满足关系Pa / Pb <= 1/2。采用这种结构，即使形成复杂形状也能够制造出具有高强度且能够被制造的压粉芯型材的方法，并且可以提供防尘芯体。

30. 发明授权

US07258812B2 Compound magnetic material and fabrication method thereof 有权
标题翻译：复合磁性材料及其制造方法
公开(公告)号：US07258812B2
公开(公告)日：2007-08-21
申请号：US10490096
申请日：2002-10-28
申请人： Yoshiyuki Shimada , Hitoshi Oyama , Takao Nishioka
发明人： Yoshiyuki Shimada , Hitoshi Oyama , Takao Nishioka
IPC分类号： H01F1/26 , H01F1/33
CPC分类号： H01F1/26 , B22F2003/026 , B22F2003/145 , B22F2003/248 , B22F2998/00 , B22F2998/10 , B22F2999/00 , H01F1/33 , H01F41/0246 , B22F3/24 , B22F2201/02 , B22F1/0059 , B22F3/14 , B22F3/105 , B22F3/15
摘要： A compound magnetic material having high heat resistance is provided. A fabrication method of a compound magnetic material includes the step of preparing mixed powder including an organic resin and compound magnetic particles. The long-period heat resistance temperature of the organic resin is at least 200° C. The containing ratio of the organic resin to the compound magnetic particles exceeds 0 mass % and not more than 0.2 mass %. The compound magnetic particle includes a metal magnetic particles, and a coat layer containing metal oxide, directly bound to the surface of the metal magnetic particle. The fabrication method of a compound magnetic material includes the steps of forming a compact by introducing mixed powder into a die having a lubricant applied to its surface and conducting warm-compacting, and applying heat treatment to the compact.
摘要翻译：提供具有高耐热性的复合磁性材料。复合磁性材料的制造方法包括制备包含有机树脂和复合磁性颗粒的混合粉末的步骤。有机树脂的长期耐热温度为至少200℃。有机树脂与复合磁性粒子的含有比例超过0质量％以上0.2质量％以下。复合磁性颗粒包括金属磁性颗粒和包含金属氧化物的涂层，其直接结合到金属磁性颗粒的表面。复合磁性材料的制造方法包括以下步骤：通过将混合粉末引入到其表面上施加润滑剂的模具中并进行热压成型，并对该压块进行热处理来形成压块。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式