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1. 发明专利

JPH05144316A CONDUCTIVE PASTE COMPOSITION 失效
公开(公告)号：JPH05144316A
公开(公告)日：1993-06-11
申请号：JP30643791
申请日：1991-11-21
申请人： HITACHI LTD
发明人： SUZUKI HIDEO , KODAMA HIRONORI , KITAZAWA CHOSHIRO , KATO AKIRA , OKAMOTO MASAHIDE
IPC分类号： C04B37/00 , H01B1/16 , H05K1/09 , H05K3/46
摘要： PURPOSE:To provide both a conductive paste composition giving conductor of low thermal expansion property without damaging the electric resistance thereof and a novel multilayer ceramic circuit substrate prepared through the process of using the composition CONSTITUTION:A conductive paste composition is characterized in that electric resistivity for a conductor is not more than 15.0OMEGAcm and the thermal expansion coefficient thereof is not more than 13.0X10 / deg.C, and more concretely paste consists mainly of copper containing 10 to 50wt.% of tungsten and/or molybdenum and 0 to 30wt% of a glass component. A conductor is accordingly formed out of such composition, and a ceramic circuit substrata comprises the conductor and an insulating layer laminated together.

2. 发明专利

JPH025310B2 失效
公开(公告)号：JPH025310B2
公开(公告)日：1990-02-01
申请号：JP10914683
申请日：1983-06-20
申请人： HITACHI LTD
发明人： ASAI TADAMICHI , NAKAMURA KOSUKE , MAEDA KUNIHIRO , SOEDA ATSUKO , SUZUKI YASUTAKA , KITAZAWA CHOSHIRO
IPC分类号： H01C1/012 , C04B35/56 , C04B35/565 , C04B41/91 , H05K1/03 , H05K3/46

3. 发明专利

JPS62266726A SLIDER FOR THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPS62266726A
公开(公告)日：1987-11-19
申请号：JP10844786
申请日：1986-05-14
申请人： HITACHI LTD
发明人： HIGUCHI SHINSUKE , GOTO AKIHIRO , KITAZAWA CHOSHIRO , MITSUYOSHI TADAHIKO , OURA MASAKI , NAGAIKE SADAKUNI
IPC分类号： G11B5/31 , G11B5/10 , G11B5/60
摘要： PURPOSE:To obtain a slider which has good slidability with a magnetic head and is suitable for formation of a thin film element by forming the slider of a sintered body essentially consisting of metallic silcide. CONSTITUTION:Respective powders of MoSi2 and WSi2 are ground with a ball mill for 50hr to pressure, the molding is hot-pressed and calcined for one hour in a vacuum atmosphere under 500kg/cm press pressure. The calcination temp. is set at 1,800 deg.C. The sintered body having >=6X10 deg.C and deg.C coefft. of thermal expansion is then obtd. The slider having the slidability with the magnetic head higher at least by >=4 times than the slidability of the conventional slider made of the composite Al2O3/TiC sintered body if the slider 1 is formed by working such sintered body.

4. 发明专利

JPH034195A HEAT-RESISTING PLATE FOR NUCLEAR FUSIION REACTOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH034195A
公开(公告)日：1991-01-10
申请号：JP13755789
申请日：1989-06-01
申请人： HITACHI LTD
发明人： KIKUCHI SHIGERU , GOTO SUMITAKA , NAKAZAWA TETSUO , IIJIMA SHIRO , SAKAMOTO HIROSHI , KITAZAWA CHOSHIRO
IPC分类号： G21B1/11 , C04B35/66 , G21B1/00 , G21B1/17
摘要： PURPOSE:To improve the heat and inpact resistance, etc., by using a reinforcing fiber material for the surface layer of a heat receiving surface side, making a heat radiation side surface layer of a heat-resisting material, etc., and arranging material components of an intermediate layer between both layers so that the component ratio varies continuously. CONSTITUTION:One block of the 1st wall material of a fusion reactor consists of a slanting function material 1, a support member 2 which supports it, a cooling medium flow passage 4, the heat receiving surface 5, and a groove 6 which reduce an electro magnetic force operating on the slanting function material 1. The heat receiving surface side surface layer is made of, for example, C/C(F) (F reinforcing fiber), SiC/C (F), etc., and the heat-radiation surface side surface layer uses, for example, TiC, MgO, etc., as a single body or their matrix and the mixed material of the fiber rein forced material of the heat receiving surface side surface layer is used. The slanting function material 1 is fixed to the member 2 by, for example, soldering, diffusion connection, etc., and when a difference of thermal expansion is large, an intermediate material of, for example, tungsten is sandwiched. It is divided to proper size and fitted to the member 2 so as to reduce the electromagnetic force.

5. 发明专利

JPS63208208A SLIDER MATERIAL FOR MAGNETIC DISC 失效
公开(公告)号：JPS63208208A
公开(公告)日：1988-08-29
申请号：JP4031487
申请日：1987-02-25
申请人： HITACHI LTD
发明人： SAKAMOTO HIROSHI , MAEDA KUNIHIRO , GOTO AKIHIRO , HIGUCHI HIROSUKE , KITAZAWA CHOSHIRO , MIYAZAKI TAKESHI , SAITO SUKEO
IPC分类号： C04B35/56 , C04B35/10 , C04B35/563 , C04B35/565 , C04B35/58 , G11B5/60 , H01F10/28
摘要： PURPOSE:To improve sliding properties by adding small quantities of BN and B4C, which are solid lubricants, to slider material. CONSTITUTION:Sintered nonmagnetic oxide, carbide, nitride or boride is employed as base material of slider material. The composite sintered material of two-three of the above mentioned materials has the same effect. Especially, when the base material is Al2O3, Al2O3-TiC, ZrO2, TiO2, SiC, MoSi2 or ZrB2, an excellent performance can be exhibited. As solid lubricants which are added to the base material in order to provide sliding properties, 5-30% of B4C, BN and C are suitable. With this constitution, a slider with excellent sliding properties and a long SCC life can be obtained.

6. 发明专利

JPS62234223A THIN FILM MAGNETIC HEAD SLIDER AND ITS PRODUCTION 失效
公开(公告)号：JPS62234223A
公开(公告)日：1987-10-14
申请号：JP7657886
申请日：1986-04-04
申请人： HITACHI LTD
发明人： HIGUCHI SHINSUKE , KITAZAWA CHOSHIRO , MITSUYOSHI TADAHIKO , OURA MASAKI , NAGAIKE SADAKUNI
IPC分类号： G11B5/60
摘要： PURPOSE:To obtain a magnetic disk having a long life by allowing a crystalline particle field including at least C to exist in slider materials. CONSTITUTION:A ZrO2 is used as slider materials. The particle size of crystal is reduced by setting the sintering temperature to 1,650-2,000 deg.C to prevent chipping. For example, slider materials are allowed to contain 0.2-2.0wt% C to prevent air holes from remaining in the sintered body. C and ZrO2 powder are mixed very uniformly before sintered for the purpose of attaining a microscopical uniformness of slider materials. The phase containing C generated as the result has conductibility, and therefore, the whole of the sintered body is made conductive. Thus, electrification of a thin film element slider 3 is prevented to reduce sticking of dust in air to the slider. A part of the phase containing C is made amorphous to allow minute worn materials on a magnetic disk sliding face 4 to interpose as a lubricant.

7. 发明专利

JPH0565470B1 失效
公开(公告)号：JPH0565470B1
公开(公告)日：1993-09-17
申请号：JP18526687
申请日：1987-07-24
申请人： HITACHI LTD
发明人： SAKAMOTO HIROSHI , IIJIMA SHIRO , SATO KOJI , KITAZAWA CHOSHIRO
IPC分类号： C04B35/76 , B32B18/00 , C04B35/00 , C04B35/10 , C04B35/14 , C04B35/50 , C04B35/56 , C04B35/58 , C04B35/80 , C04B35/81 , C04B37/00 , C04B41/87 , F01D5/28 , F03B7/00 , F03B11/04 , F04D29/66

8. 发明专利

JPH01028282A High-strength sintered composite ceramic material having excellent toughness and corrosion resistance and production thereof 失效
标题翻译：高强度烧结复合陶瓷材料具有优异的韧性和耐腐蚀性和生产性
公开(公告)号：JPH01028282A
公开(公告)日：1989-01-30
申请号：JP18526687
申请日：1987-07-24
申请人： Hitachi Ltd
发明人： SAKAMOTO HIROSHI , IIJIMA SHIRO , SATO KOJI , KITAZAWA CHOSHIRO
IPC分类号： C04B35/76 , B32B18/00 , C04B35/00 , C04B35/10 , C04B35/14 , C04B35/50 , C04B35/56 , C04B35/58 , C04B35/80 , C04B35/81 , C04B37/00 , C04B41/87 , F01D5/28 , F03B7/00 , F03B11/04 , F04D29/66
CPC分类号： Y02E10/223 , Y02E10/226 , Y02P70/525
摘要： PURPOSE:To obtain the titled sintered material having high stability and excellent high-temperature strength and toughness and useful as a valve for high- pressure fluid, by arranging a ceramic layer at the surface and a specific composite layer at the inner side, forming the arranged material and sintering the product in an oxygen-free atmosphere with a hot press etc. CONSTITUTION:A simple ceramic layer (A) composed of a matrix phase 1 of a ceramic and having a working surface thickness (t) of 1-40% of the total thickness (T) is prepared from a compound selected from SiC, Si3N4, sialon, ZrO2 and Al2O3. An inner composite layer (B) is produced by dispersing a dispersoid 2 selected from one or more kinds of particles and one or more kinds of whiskers or fibers of simple metal, metal carbide, metal nitride, metal silicide and metal boride in a ceramic same as the matrix of the layer A. The layers A and B are arranged, formed and sintered in an oxygen-free atmosphere under heating to obtain a high-strength sintered composite ceramic material having excellent corrosion resistance and exhibiting high toughness even if cracks 3 are generated.
摘要翻译：目的：为了获得具有高稳定性和优异的高温强度和韧性的标题烧结材料，可用作高压流体的阀，通过在表面设置陶瓷层和内侧的特定复合层，形成在无氧气氛下用热压机等烧结产品。构成：由陶瓷基质相1组成的具有1-40％的工作表面厚度（t）的简单陶瓷层（A）的总厚度（T）由选自SiC，Si 3 N 4，赛隆，ZrO 2和Al 2 O 3的化合物制备。通过将选自一种或多种颗粒的分散质2和一种或多种简单金属，金属碳化物，金属氮化物，金属硅化物和金属硼化物的晶须或纤维分散在陶瓷相中来制备内复合层（B）作为层A的基体。层A和B在加热下在无氧气氛中排列，形成和烧结，以获得具有优异耐腐蚀性和显示出高韧性的高强度烧结复合陶瓷材料，即使裂纹3为产生。

9. 发明专利

JPS6418921A OXIDE CERAMICS SUPERCONDUCTOR 失效
公开(公告)号：JPS6418921A
公开(公告)日：1989-01-23
申请号：JP17101287
申请日：1987-07-10
申请人： HITACHI LTD
发明人： NAKAMURA TAKAE , MAEDA KUNIHIRO , TAKEDA YUKIO , SOEDA ATSUKO , SUZUKI TAKAAKI , KITAZAWA CHOSHIRO , NAKAZAWA MASATOSHI
IPC分类号： C01G3/00 , C01G1/00 , C01G25/00 , C04B35/00 , C04B35/45 , H01B12/00 , H01L39/12
摘要： PURPOSE:To obtain the titled superconductor, consisting of a partially stabilized zirconia, specific most suitable as coils and wiry materials without occurrence of and propagation of cracks. CONSTITUTION:A blended powder of 0.5-40vol.% partially stabilized zirconia, two or more metallic oxides selected from Ba, Y, Sr, La, Sc and lanthanoids, Cu and O is calcined in O2 atmosphere, pulverized and fired to afford the aimed oxide ceramics superconductor consisting of the partially stabilized zirconia, two or more metals selected from Ba, Y, Sr, La, Sc and lanthanoids, Cu and O.

10. 发明专利

JPH06313509A PULVERIZED COAL FIRING EQUIPMENT 失效
公开(公告)号：JPH06313509A
公开(公告)日：1994-11-08
申请号：JP10291693
申请日：1993-04-28
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOBAYASHI YOSHINOBU , KONO TAKESHI , NARATO KIYOSHI , OKAZAKI HIROFUMI , AOKI YOSHITOMO , KITAZAWA CHOSHIRO , MORITA SHIGEKI
IPC分类号： F23C99/00 , F23D1/00 , F23C11/00
摘要： PURPOSE:To reduce a great deal NOx concentration produced in a combustion of pulverized coal in a pulverized coal firing equipment in which combustion exhaust gas of pulverized coal is recirculated and oxygen is mixed into the recirculated combustion exhaust gas, whereby combustion is realized. CONSTITUTION:A gas mixture obtained by a mixer 10 which mixes combustion exhaust gas extracted by a blower 9 from a duct in the downstream of a furnace 1 with oxygen produced by an oxygen supplier 11 is used as fuel gas, and is supplied to a window box 3. A gas having a smaller specific heat than the fuel gas is used as a carrying gas for a fuel sypplying system. The carrying gas, having been supplied by another blower 7 and passed through a heater 8, is mixed with pulverized coal by a pulverizer. The mixture thus obtained is then fed into the furnace by a pulverized coal nozzle 5.

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