公开(公告)号：US06730624B2

公开(公告)日：2004-05-04

申请号：US10427978

申请日：2003-05-02

Applicant: Tomoo Motoki ,  Masahiro Naito ,  Harunobu Sano

Inventor： Tomoo Motoki ,  Masahiro Naito ,  Harunobu Sano

IPC: C04B35465

CPC classification number: C04B35/465 ,  H01G4/1227 ,  H01G4/1236 ,  H01G4/1245

Abstract: A non-reducing dielectric ceramic contains Ca, Zr and Ti as metallic elements and does not contain Pb. In a CuK&agr; X-ray diffraction pattern, the ratio of the maximum peak intensity of secondary crystal phases to the maximum peak intensity at 2&thgr;=25° to 35° of a perovskite primary crystal phase is about 12% or less, the secondary crystal phases including all the crystal phases other than the perovskite primary crystal phase. The non-reducing dielectric ceramic exhibits superior insulating resistance and dielectric loss after firing in a neutral or reducing atmosphere and high reliability in a high-temperature loading lifetime test and is useful for producing compact high-capacitance monolithic ceramic capacitors.

Abstract translation: 非还原电介质陶瓷含有Ca，Zr和Ti作为金属元素，不含Pb。 在CuKαX射线衍射图中，二次晶相的最大峰强度与钙钛矿一次结晶相的2θ= 25°〜35°的最大峰强度的比例为约12％以下，二次结晶相 包括除了钙钛矿一级结晶相以外的所有晶相。 非还原电介质陶瓷在中性或还原性气氛中焙烧后具有优异的绝缘电阻和介电损耗，并且在高温负载寿命试验中具有高可靠性，并且可用于生产紧凑型大电容单片陶瓷电容器。

公开(公告)号：US06442813B1

公开(公告)日：2002-09-03

申请号：US09058081

申请日：1998-04-09

Applicant: Norihiko Sakamoto ,  Harunobu Sano ,  Takaharu Miyazaki

Inventor： Norihiko Sakamoto ,  Harunobu Sano ,  Takaharu Miyazaki

IPC: H01G907

CPC classification number: H01G4/30 ,  Y10T29/43 ,  Y10T29/435 ,  Y10T29/49126

Abstract: A monolithic ceramic capacitor includes a plurality of dielectric ceramic layers, a plurality of inner electrodes formed between the dielectric ceramic layers in such a manner that one end of each inner electrode is exposed out of either end of the dielectric ceramic layers, and outer electrodes electrically connected with the exposed inner electrodes; in which the inner electrodes each are made of a base metal, and Si oxide layers or layers comprising an Si oxide and at lest one component that constitutes said dielectric ceramic layers and said inner electrodes are formed adjacent to the inner electrodes. The capacitor has excellent thermal impact resistance and wet load resistance characteristics. A producing method includes firing a green sheet laminate including a metal inner electrode at an oxygen partial pressure of about said equilibrium oxygen partial pressure of the metal to the metal oxide.

Abstract translation: 单片陶瓷电容器包括多个电介质陶瓷层，多个内电极，形成在电介质陶瓷层之间，使每个内电极的一端从电介质陶瓷层的任一端露出，外电极电 与暴露的内部电极连接; 其中内部电极各自由贱金属制成，并且包括Si氧化物的Si氧化物层或构成所述介电陶瓷层和所述内部电极的至少一个部件的Si形成在与内部电极相邻的位置。 电容器具有优异的耐热冲击性和耐湿负载特性。 一种制造方法包括以大约金属的平衡氧分压的氧分压与金属氧化物烧结包含金属内电极的生片层压体。

公开(公告)号：US06310761B1

公开(公告)日：2001-10-30

申请号：US09655071

申请日：2000-09-05

Applicant: Kenji Hori ,  Kotaro Hata ,  Toshihiro Ikamatsu ,  Tomoyuki Nakamura ,  Harunobu Sano

Inventor： Kenji Hori ,  Kotaro Hata ,  Toshihiro Ikamatsu ,  Tomoyuki Nakamura ,  Harunobu Sano

IPC: H01G406

CPC classification number: C04B35/4682 ,  C01G23/002 ,  C01P2004/61 ,  C01P2006/40 ,  H01G4/1227

Abstract: A dielectric ceramic composition is composed of barium titanate (BamTiO3), a rare-earth oxide (RO3/2), where the rare-earth element is at least one of Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, calcium oxide and a silicon oxide. When the dielectric ceramic composition is represented by the formula 100BamTiO3+aRO3/2+bCaO+cSiO2, where coefficients 100, a, b, and c indicate moles, the relationships 0.990≦m≦1.030, 0.5≦a≦30, 0.5≦b≦30, and 0.5≦c≦30 are satisfied. A monolithic ceramic capacitor includes a plurality of dielectric ceramic layers, internal electrodes formed between the dielectric ceramic layers and external electrodes electrically connected to the internal electrodes. The dielectric ceramic layers are composed of the dielectric ceramic composition described above, and the internal electrodes are composed of a base metal as a principal constituent.

Abstract translation: 介电陶瓷组合物由稀土元素为Y，Sm，Eu，Gd，Tb，Dy，Ho，Er中的至少一种的钛酸钡（BamTiO 3），稀土类氧化物（RO3 / 2） ，Tm和Yb，氧化钙和氧化硅。 当电介质陶瓷组合物由式100BamTiO3 + aRO3 / 2 + bCaO + cSiO2表示时，其中系数100，a，b和c表示摩尔数，关系0.990 <= m <= 1.030,0.5 <= a <= 30 ，0.5 <= b <= 30，满足0.5 <= c <30。 单片陶瓷电容器包括多个电介质陶瓷层，形成在电介质陶瓷层和电连接到内部电极的外部电极之间的内部电极。 电介质陶瓷层由上述介电陶瓷组合物构成，内部电极以贱金属为主要成分。

公开(公告)号：US06195250B1

公开(公告)日：2001-02-27

申请号：US09394419

申请日：1999-09-13

Applicant: Hiroaki Matoba ,  Harunobu Sano

Inventor： Hiroaki Matoba ,  Harunobu Sano

IPC: H01G406

CPC classification number: C04B35/4686 ,  H01G4/1227

Abstract: Laminated ceramic parts such as a laminated ceramic condenser and a laminated LC filter are formed by using a temperature compensating dielectric ceramic composition having a high relative dielectric constant and a high Q value, and which can be sintered at a relatively low temperature during the manufacturing processes, without causing any undesired variations in ceramic properties during the sintering treatment. The composition includes 100 parts by weight of a main component having a mole composition ratio (BaO, TiO2, Re2O3) shown in a ternary composition diagram indicated by an area surrounded by point A (39.5. 59.5, 1), point B (1, 59.5, 39.5), point C (1, 85, 14) and point D (14, 85, 1); about 25 parts by weight or less of a lead free B2O3—SiO2 glass; at least one of V oxide (the content as V2O5 being about 10 parts by weight or less) and W oxide (the content as WO3 being about 20 parts by weight or less). Preferably, the composition further contains either about 10 parts by weight or less of CuO, or about 20 parts by weight or less of MnO.

Abstract translation: 通过使用具有高相对介电常数和高Q值的温度补偿介电陶瓷组合物来形成层压陶瓷电容器和层叠LC滤波器之类的层压陶瓷部件，并且可以在制造过程中在相对低的温度下烧结 ，而不会在烧结处理期间引起陶瓷性能的任何不期望的变化。 该组合物包含100重量份具有以由A点（39.5,59.5,1）包围的区域表示的三元组成图所示的摩尔组成比（BaO，TiO 2，Re 2 O 3）的主要成分，B（1， 59.5,39.5），C点（1,85,14）和D点（14,85,1）; 约25重量份或更少的无铅B2O3-SiO2玻璃; V氧化物（V 2 O 5的含量为约10重量份以下）和W氧化物（WO 3的含量为约20重量份以下）中的至少一种。 优选地，组合物还含有约10重量份或更少的CuO，或约20重量份或更少的MnO。

公开(公告)号：US5853515A

公开(公告)日：1998-12-29

申请号：US622068

申请日：1996-03-26

Applicant: Harunobu Sano ,  Yukio Hamaji

Inventor： Harunobu Sano ,  Yukio Hamaji

IPC: H01G4/12 ,  H01G4/30 ,  B32B31/26 ,  H01G4/008

CPC classification number: H01G4/1227 ,  H01G4/30 ,  Y10T29/435

Abstract: A multilayer ceramic capacitor and a process for producing the same, which comprises dielectric ceramic layers, internal electrodes disposed between the dielectric ceramic layers, and an external electrode connected to the internal electrodes, the dielectric ceramic layers comprising barium titanate, a bismuth compound, and an anti-reducing agent, the internal electrodes comprising nickel or a nickel alloy.

Abstract translation: 一种多层陶瓷电容器及其制造方法，其包括电介质陶瓷层，设置在介电陶瓷层之间的内部电极和连接到内部电极的外部电极，所述介电陶瓷层包括钛酸钡，铋化合物和 抗还原剂，内部电极包括镍或镍合金。

公开(公告)号：US5801111A

公开(公告)日：1998-09-01

申请号：US785783

申请日：1997-01-21

Applicant: Hiroyuki Wada ,  Harunobu Sano ,  Norihiko Sakamoto ,  Yukio Hamaji

Inventor： Hiroyuki Wada ,  Harunobu Sano ,  Norihiko Sakamoto ,  Yukio Hamaji

IPC: C04B35/00 ,  C04B35/46 ,  C04B35/468 ,  C04B35/495 ,  H01B3/12 ,  H01G4/12 ,  C04B35/462 ,  H01G4/10 ,  H01G7/00

CPC classification number: C04B35/468 ,  C04B35/495 ,  H01G4/1227 ,  H01G4/1254

Abstract: Disclosed herein is a dielectric ceramics composition which comprises 100 moles of a primary component being a barium titanate (containing less than about 0.02 wt % of alkali metal oxide as an impurity) as expressed by the compositional formula: (1-.alpha.-.beta.-.gamma.){BaO}.sub.m.TiO.sub.2 +.alpha.M.sub.2 O.sub.3 +.beta.Re.sub.2 O.sub.3 +.gamma.(Mn.sub.1-x-y Ni.sub.x Co.sub.y)O (where M.sub.2 O.sub.3 denotes Sc.sub.2 O.sub.3 or Y.sub.2 O.sub.3 or both, Re.sub.2 O.sub.3 denotes Sm.sub.2 O.sub.3 or Eu.sub.2 O.sub.3 or both, 0.0025.ltoreq..alpha.+.beta..ltoreq.0.025, 0

Abstract translation: 本文公开了一种电介质陶瓷组合物，其包含100摩尔的主要组分，其为组成式表示的钛酸钡（含有少于约0.02重量％的碱金属氧化物作为杂质）的主要组分：（1-α-β-γ ）{BaO} m.TiO 2 +αM 2 O 3 +βRe 2 O 3 +γ（Mn1-x-yNixCoy）O（其中M2O3表示Sc2O3或Y2O3或两者，Re2O3表示Sm2O3或Eu2O3或两者，0.0025 < 0 <β=0.0075,0.0025≤γ≤0.05，γ/（α+β）4，0

公开(公告)号：US5554571A

公开(公告)日：1996-09-10

申请号：US538335

申请日：1995-10-03

Applicant: Shinsei Okabe ,  Sakiko Iwamoto ,  Harunobu Sano

Inventor： Shinsei Okabe ,  Sakiko Iwamoto ,  Harunobu Sano

IPC: C01G25/00 ,  C01G27/00 ,  C04B35/49 ,  C04B35/626

CPC classification number: C01G27/006 ,  C01G25/006 ,  C04B35/49 ,  C04B35/626 ,  C01P2002/34

Abstract: Powder of dielectric ceramic materials is produced by preparing a main component Ba(Ti.sub.1-x-y Zr.sub.x Hf.sub.y)O.sub.3 allowing barium hydroxide, at least one titanium compound, at least one zirconium compound and at least one hafnium compound to react with one another by condensation by catalytic actions of a base selected from the group consisting of alkali and amines; preparing a complex hydroxide of at least one rare earth element and manganese by allowing at least one rare earth element compound and a manganese compound to react with a base selected from the group consisting of alkali and amines in an aqueous solution; preparing at least one carbonate of calcium and magnesium by allowing at least one compound of calcium compounds and magnesium compounds to react with carbonate ions in an aqueous solution; mixing all the precipitates, and drying and thermally treating the resultant mixture.

Abstract translation: 电介质陶瓷材料的粉末是通过制备主要成分Ba（Ti1-x-yZrxHfy）O3来制备的，所述主要组分Ba（Ti1-x-yZrxHfy）O3允许氢氧化钡，至少一种钛化合物，至少一种锆化合物和至少一种铪化合物彼此反应， 选自碱和胺的碱的催化作用; 通过在水溶液中使至少一种稀土元素化合物和锰化合物与选自碱和胺的碱反应来制备至少一种稀土元素和锰的复合氢氧化物; 通过使至少一种化合物的钙化合物和镁化合物与水溶液中的碳酸根离子反应来制备至少一种钙和镁的碳酸盐; 混合所有沉淀物，并干燥并热处理所得混合物。

公开(公告)号：US07498285B2

公开(公告)日：2009-03-03

申请号：US11875683

申请日：2007-10-19

Applicant: Toshiyuki Ito ,  Harunobu Sano

Inventor： Toshiyuki Ito ,  Harunobu Sano

IPC: C04B35/47

CPC classification number: C04B35/49 ,  B32B18/00 ,  B32B2311/12 ,  B32B2311/22 ,  B82Y30/00 ,  C03C8/18 ,  C04B35/4682 ,  C04B35/47 ,  C04B35/6262 ,  C04B35/6303 ,  C04B2235/3205 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3244 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/36 ,  C04B2235/442 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/6025 ,  C04B2235/652 ,  C04B2235/6582 ,  C04B2235/76 ,  C04B2235/762 ,  C04B2235/765 ,  C04B2235/768 ,  C04B2235/96 ,  C04B2237/346 ,  C04B2237/348 ,  C04B2237/405 ,  C04B2237/407 ,  C04B2237/704 ,  H01G4/1227 ,  H01G4/1245

Abstract: A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and whose powder CuKα X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2θ=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.

Abstract translation: 包含（Sr，Ca）（Ti，Ca）（Ti，Zr）O 3的钙钛矿主晶相的非还原电介质陶瓷，其含有55％（摩尔）以上的SrTiO 3，其粉末CuKαX射线衍射图的比例小于 辅助晶相的最大峰强度是其他晶相，相对于2θ= 25°至35°的钙钛矿结晶相的最大峰的强度。 该钛酸锶系非还原电介质陶瓷的相对介电常数为150以上，三次谐波失真比低，高温负荷试验的可靠性优异。 因此，有利地用于形成单片陶瓷电容器的介电陶瓷层。

公开(公告)号：US20080193776A1

公开(公告)日：2008-08-14

申请号：US11875683

申请日：2007-10-19

Applicant: Toshiyuki Ito ,  Harunobu Sano

Inventor： Toshiyuki Ito ,  Harunobu Sano

IPC: B32B17/06 ,  C04B35/00

CPC classification number: C04B35/49 ,  B32B18/00 ,  B32B2311/12 ,  B32B2311/22 ,  B82Y30/00 ,  C03C8/18 ,  C04B35/4682 ,  C04B35/47 ,  C04B35/6262 ,  C04B35/6303 ,  C04B2235/3205 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3244 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/36 ,  C04B2235/442 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/6025 ,  C04B2235/652 ,  C04B2235/6582 ,  C04B2235/76 ,  C04B2235/762 ,  C04B2235/765 ,  C04B2235/768 ,  C04B2235/96 ,  C04B2237/346 ,  C04B2237/348 ,  C04B2237/405 ,  C04B2237/407 ,  C04B2237/704 ,  H01G4/1227 ,  H01G4/1245

Abstract: A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and whose powder CuKα X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2θ=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.

Abstract translation: 一种非还原电介质陶瓷，其包含含有55摩尔％以上的SrTiO 3 3的（Sr，Ca）（Ti，Zr）O 3 N基的钙钛矿主晶相，其粉末 CuKαX射线衍射图显示的是其他晶相的附加晶相的最大峰强度与钙钛矿结晶相的最大峰强度的5％以下，其比率为2θ= 25° 至35°。 该钛酸锶系非还原电介质陶瓷的相对介电常数为150以上，三次谐波失真比低，高温负荷试验的可靠性优异。 因此，有利地用于形成单片陶瓷电容器的介电陶瓷层。

公开(公告)号：US20080112109A1

公开(公告)日：2008-05-15

申请号：US11947431

申请日：2007-11-29

Applicant: Kazuo Muto ,  Tomoyuki Nakamura ,  Harunobu Sano

Inventor： Kazuo Muto ,  Tomoyuki Nakamura ,  Harunobu Sano

IPC: H01G4/12 ,  C04B35/00

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  C04B35/49 ,  C04B2235/3201 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3289 ,  C04B2235/3291 ,  C04B2235/3418 ,  C04B2235/656 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/768 ,  C04B2235/79 ,  H01G4/1245 ,  H01G4/30

Abstract: A dielectric ceramic includes a compound represented by the general formula: (Ba1-tCat)m(Ti1-u-xZruCux)O3 (where 0.96≦m≦1.02, 0.001≦x≦0.03, 0≦t≦0.1, and 0≦u≦0.06) as a primary component, a rare earth element Re such as Dy, a metal element M such as Mn, Mg, and Si. In the dielectric ceramic, the Cu is uniformly and dispersedly present in the primary phase grain forming the primary component, and the contents of the accessory components with respect to 100 molar parts of the primary component are 0.1 to 1.5 molar parts of Re, 0.1 to 0.6 molar parts of M, 0.1 to 1.5 molar parts of Mg and 0.1 to 2.0 molar parts of Si. Accordingly, a multilayer ceramic capacitor can be realized which has a high dielectric constant, superior temperature properties, and a high reliability, and also has a small change in electrostatic capacitance with time.

Abstract translation: 电介质陶瓷包括由以下通式表示的化合物：（Ba 1-t C 1）m（Ti 1-ux） （其中0.96 <= m <=1.02,0.001,0≤x≤0.03）其中， 0 <= t <= 0.1，0 <= u <= 0.06）作为主要成分，稀土元素Re如Dy，金属元素M如Mn，Mg和Si。 在电介质陶瓷中，Cu均匀分散存在于形成主要成分的初晶相中，辅助成分相对于100摩尔份的主成分为0.1〜1.5摩尔份，Re为0.1〜 0.6摩尔份M，0.1〜1.5摩尔份的Mg和0.1〜2.0摩尔的Si。 因此，可以实现具有高介电常数，优异的温度特性和高可靠性的多层陶瓷电容器，并且随着时间的推移也具有小的静电电容变化。