公开(公告)号：US5977006A

公开(公告)日：1999-11-02

申请号：US072789

申请日：1998-05-06

申请人： Yoshiaki Iguchi ,  Mutsumi Honda ,  Hiroshi Kishi

发明人： Yoshiaki Iguchi ,  Mutsumi Honda ,  Hiroshi Kishi

IPC分类号： H01G4/12 ,  H01G4/20 ,  C04B35/468

CPC分类号： H01G4/20

摘要： A dielectric ceramic essentially in the form of an aggregate of crystal grains each having a ferroelectric core enclosed in a paraelectric shell. The shells are created by thermal diffusion of magnesium into the crystal grains. Through control of the firing temperature and time the thicknesses of the shells are confined in the range of approximately 5-30% of the average grain size. The resulting ceramic is low in dielectric constant and favorable in temperature characteristic of capacitance, making it suitable for use in laminated capacitors.

公开(公告)号：US06087287A

公开(公告)日：2000-07-11

申请号：US394729

申请日：1999-09-13

申请人： Yoshiaki Iguchi ,  Mutsumi Honda ,  Hiroshi Kishi

发明人： Yoshiaki Iguchi ,  Mutsumi Honda ,  Hiroshi Kishi

IPC分类号： H01G4/12 ,  H01G4/20 ,  C04B35/468 ,  B23B31/26

CPC分类号： H01G4/20

摘要： A dielectric ceramic essentially in the form of an aggregate of crystal grains each having a ferroelectric core enclosed in a paraelectric shell. The shells are created by thermal diffusion of magnesium into the crystal grains. Through control of the firing temperature and time the thicknesses of the shells are confined in the range of approximately 5-30% of the average grain size. The resulting ceramic is low in dielectric constant and favorable in temperature characteristic of capacitance, making it suitable for use in laminated capacitors.

摘要翻译： 基本上是晶粒聚集形式的电介质陶瓷，每个晶粒都具有包围在顺电外壳中的铁电芯。 壳是通过镁向晶粒的热扩散而产生的。 通过控制烧制温度和时间，将壳的厚度限制在平均晶粒尺寸的约5-30％的范围内。 所得陶瓷的介电常数低，电容温度特性良好，适用于层叠电容器。

公开(公告)号：US6004373A

公开(公告)日：1999-12-21

申请号：US876232

申请日：1997-06-16

申请人： Shoji Hayashi ,  Yoshiaki Iguchi

发明人： Shoji Hayashi ,  Yoshiaki Iguchi

IPC分类号： C01B31/30 ,  C21B13/00 ,  C21B15/00 ,  C22B5/06 ,  C22B5/12 ,  C22B5/14

CPC分类号： C01B31/30 ,  C21B13/0073 ,  C22B5/06 ,  C22B5/12 ,  Y02P10/136

摘要： A method for producing iron carbide by bringing iron ore into contact with a reducing gas containing hydrogen and a carbon compound at a high reaction temperature and at a reaction pressure of the atmospheric pressure or more to reduce and carburize the iron ore with the participation of a sulfur component, the method includes measuring the reaction temperature, partial pressure P(H.sub.2) of the hydrogen and partial pressure P(H.sub.2 S) of hydrogen sulfide contained in the reducing gas, calculating sulfur activity a.sub.s in the reducing gas from Equation (1) shown below, and adjusting the partial pressure P(H.sub.2 S) of the hydrogen sulfide in the reducing gas to obtain a.sub.s =1.0 to 2.0 at reaction temperatures of 550.degree. C. and above but less than 650.degree. C., a.sub.s =0.7 to 2.0 at 650.degree. C., and a.sub.s =0.05 to 1.0 at over 650.degree. C. and up to 950.degree. C.: (1) a.sub.s =(P(H.sub.2 S)/P(H.sub.2))/(P(H.sub.2 S)/P(H.sub.2)).sub.E where (P(H.sub.2 S)/P(H.sub.2)) represents the ratio between the partial pressures of H.sub.2 S and H.sub.2 in the reducing gas and (P(H.sub.2 S)/P(H.sub.2)).sub.E is the ratio between the partial pressures of H.sub.2 S and H.sub.2 in a condition where the reaction of Equation (2) below is in equilibrium: (2) FeS(s)+H.sub.2 (g)=Fe(s)+H.sub.2 S(g) where (s) and (g) represent solid and gaseous phases, respectively. The method includes controlling the reaction pressure to the atmospheric pressure or more in accordance with the oxidizing gas contained in a reducing gas at a reaction temperature of 650.degree. C. or more.

摘要翻译： 一种通过在高反应温度和大气压或更大的反应压力下使铁矿石与含有氢和碳化合物的还原气体接触来生产碳化铁的方法，以减少和渗碳铁矿石，参与 硫组分，该方法包括测量氢气中的反应温度，分压P（H2）和还原气体中所含的硫化氢的分压P（H2S），计算如下所示的式（1）的还原气体中的硫活性 并且在550℃以上但小于650℃的反应温度下调节还原气体中的硫化氢的分压P（H 2 S），以获得= 1.0〜2.0，= 0.7〜2.0 650℃，并且在650℃和= 950℃下= 0.05〜1.0（1）as =（P（H2S）/ P（H2））/（P（H2S）/ P H2））E其中（P（H2S）/ P（H2））表示还原气体中的H 2 S和H 2的分压与（P（H 2 S）/ P（H 2） ）E是下式（2）的反应处于平衡状态的H2S和H2的分压之间的比例：（2）FeS（s）+ H2（g）= Fe（s）+ H2S ）其中（s）和（g）分别表示固相和气相。 该方法包括在650℃以上的反应温度下，根据还原气体中所含的氧化气体，将反应压力控制为大气压以上。

公开(公告)号：US4901044A

公开(公告)日：1990-02-13

申请号：US293945

申请日：1989-01-05

申请人： Masao Igarashi ,  Isao Akiyama ,  Kazuhiro Kumagai ,  Yoshinobu Takeda ,  Mamoru Yamaki ,  Yoshiaki Iguchi ,  Satoshi Kazama

发明人： Masao Igarashi ,  Isao Akiyama ,  Kazuhiro Kumagai ,  Yoshinobu Takeda ,  Mamoru Yamaki ,  Yoshiaki Iguchi ,  Satoshi Kazama

IPC分类号： H01P1/205

CPC分类号： H01P1/2056

摘要： A quarter-wave distributed-constant dielectric filter or resonator having a ceramic body which typically is composed principally of barium titanate. The ceramic filter body has one or more resonance holes extending therethrough. A conductive covering of silver or the like on the filter body has a portion formed on the surface defining each resonance hole. Mounted in each resonance hole is a prefabricated capacitor having a first terminal extending from within the resonance hole. The second terminal is electrically coupled to the conductive covering on the surface of the resonance hole. The capacitance of the capacitor or capacitors can be known before they are mounted to the filter body, so that the filter is readily manufacturable to exact electrical characteristics desired.

摘要翻译： 具有典型地主要由钛酸钡组成的陶瓷体的四分之一波长分布常数介质滤波器或谐振器。 陶瓷过滤器主体具有一个或多个延伸穿过其中的共振孔。 过滤器主体上的银等的导电覆盖层具有形成在限定每个共鸣孔的表面上的部分。 安装在每个谐振孔中的是具有从谐振孔内延伸的第一端子的预制电容器。 第二端子电耦合到谐振孔表面上的导电覆盖层。 电容器或电容器的电容在它们被安装到过滤器主体之前可以是已知的，使得过滤器容易制造成精确的所需电气特性。

公开(公告)号：US5683489A

公开(公告)日：1997-11-04

申请号：US588310

申请日：1996-01-18

申请人： Shoji Hayashi ,  Yoshiaki Iguchi ,  Yukihiro Hida ,  Satoshi Sawai

发明人： Shoji Hayashi ,  Yoshiaki Iguchi ,  Yukihiro Hida ,  Satoshi Sawai

IPC分类号： C01B31/30 ,  C21B13/00 ,  C21B15/00 ,  C22B5/14

CPC分类号： C01B31/303 ,  C21B13/0033 ,  C22B5/14 ,  C01P2006/80 ,  Y02P10/136 ,  Y02P10/143

摘要： A method for producing iron carbide by bringing iron ore into contact with a reducing gas containing hydrogen and a carbon compound at a specified reaction temperature to reduce and carburize the iron ore with the participation of a sulfur component, the method includes measuring the reaction temperature, partial pressure P(H.sub.2) of the hydrogen and partial pressure P(H.sub.2 S) of hydrogen sulfide contained in the reducing gas, calculating sulfur activity as in the reducing gas from equation (1) shown below, and adjusting the partial pressure P(H.sub.2 S) of the hydrogen sulfide in the reducing gas to obtain as=1.0 to 2.0. at reaction temperatures of 550.degree. C. and above but less than 650.degree. C., as=0.7 to 2.0 at 650.degree. C., and as=0.05 to 1.0 at over 650.degree. C. and up to 950.degree. C.: as=(P(H.sub.2 S)/P(H.sub.2))/(P(H.sub.2 S)/P(H.sub.2))E (1) where (P(H.sub.2 S)/P(H.sub.2)) represents the ratio between the partial pressures of H.sub.2 S and H.sub.2 in the reducing gas and (P(H.sub.2 S)/p(H.sub.2))s is the ratio between the partial pressures of H.sub.2 S and H.sub.2 in a condition where the reaction of equation (2) below is in equilibrium: FeS(s)+H.sub.2 (g)=Fe(s)+H.sub.2 S(g) (2) where (s) and (g) represent solid and gaseous phases, respectively.

摘要翻译： 该方法包括测定反应温度，该方法包括：测定反应温度，测定反应温度，测定反应温度， 包含在还原气体中的氢的分压P（H2）和硫化氢的分压P（H2S），如下所示的式（1）计算硫还原气体中的硫活性，并调节分压P（H2S） 的还原气体中的硫化氢，得到= 1.0〜2.0。 在550℃以上但小于650℃的反应温度下，在650℃下= 0.7〜2.0，在650℃以上为0.05〜1.0，最高为950℃。 =（P（H2S）/ P（H2））/（P（H2S）/ P（H2））E（1）其中（P（H2S）/ P（H2））表示H2S和 还原气体中的H2和（P（H2S）/ p（H2））s是在下式（2）的反应处于平衡状态下的H 2 S和H 2的分压之间的比例：FeS（s）+ H2（g）= Fe（s）+ H2S（g）（2）其中（s）和（g）分别表示固相和气相。