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1. 发明申请

US20040235641A1 Microwave dielectric composition and method for producing the same 有权
标题翻译：微波介电组合物及其制备方法
公开(公告)号：US20040235641A1
公开(公告)日：2004-11-25
申请号：US10486073
申请日：2004-02-06
发明人： Hitoshi Ohsato , Akio Harada , Takashi Okawa , Hiroki Okabe
IPC分类号： C04B035/468
CPC分类号： C04B35/462 , C01G23/002 , C01P2002/78 , C01P2006/40 , C04B35/626 , C04B35/6262 , C04B35/62695 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3227 , C04B2235/604 , C04B2235/768 , H05K1/0306
摘要： A first inventive microwave dielectric composition comprises a ceramic composition represented by AnR4Ti3nullnO12null3n, where a is an alkaline earth metal element, R is a rare earth element and characterized in that a case satisfying AnullBa and a case of RnullLa is excluded and the compositional ratio nnull1,2 or 4. A second inventive microwave dielectric composition comprises a ceramic composition represented by AXR4Ti3nullXO12null3X, where A is an alkaline earth metal element, R is a rare earth element and characterized in that the compositional ratio X is within a range of 0.5
摘要翻译：第一本发明的微波介电组合物包含由AnR4Ti3 + nO12 + 3n表示的陶瓷组合物，其中a为碱土金属元素，R为稀土元素，其特征在于满足A = Ba的情况和R = La 并且组成比n = 1,2或4.本发明的第二种微波介电组合物包含由AXR4Ti3 + XO12 + 3X表示的陶瓷组合物，其中A是碱土金属元素，R是稀土元素，其特征在于组成比X在0.5

2. 发明申请

US20040229746A1 X7R DIELECTRIC COMPOSITION 有权
标题翻译： X7R介电组合物
公开(公告)号：US20040229746A1
公开(公告)日：2004-11-18
申请号：US10440051
申请日：2003-05-16
申请人： Ferro Corporation
发明人： Hyun Park , Daniel E. McCauley , Mike S. H. Chu
IPC分类号： C04B035/468
CPC分类号： C04B35/4682 , B32B2311/22 , C03C3/091 , C03C8/02 , C03C8/14 , C04B35/63416 , C04B35/638 , C04B35/64 , C04B2235/3206 , C04B2235/3208 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3263 , C04B2235/3409 , C04B2235/3418 , C04B2235/365 , C04B2235/5445 , C04B2235/6025 , C04B2235/652 , C04B2235/6584 , C04B2235/663 , C04B2235/785 , C04B2237/346 , C04B2237/405 , H01G4/1227 , H01G4/30
摘要： Multilayer ceramic chip capacitors which satisfy X7R requirements and which are compatible with reducing-atmosphere sintering conditions so that non-noble metals such as nickel, copper, and alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers preferably contain BaTiO3 as the major component and Mn3O4, Y2O3, Ho2O3, CaCO3, SiO2, B2O3, Al2O3, MgO, and CaO as minor constituents. They are batched in a proportion that there are preferably present 99.00 to 98.5 wt. % BaTiO3, 0.336 to 0.505 wt. % Mn3O4, 0.198 to 0.296 wt. % Y2O3, 0.132 to 0.198 wt. % Ho2O3, 0.199 to 0.299 wt. % CaCO3, 0.057 to 0.085 wt. % SiO2, 0.039 to 0.058 wt. % B2O3, 0.018 to 0.027 wt. % Al2O3, 0.016 to 0.025 wt. % MgO and 0.005 to 0.007 wt. % CaO. The B2O3, SiO2, MgO, Al2O3, and CaO are preferably present in the form of pre-reacted glass. The preferred form of the invention may be sintered in the temperature range 1,200 to 1,300null C. in a reducing atmosphere. Additionally, a re-oxidation procedure may be utilized during the sintering cycle to optimize the resistance of the ceramic to dielectric breakdown.
摘要翻译：根据本发明制备满足X7R要求并且与还原气氛烧结条件兼容的多层陶瓷片式电容器，以使非贵金属如镍，铜及其合金可用于内部和外部电极。电容器表现出所需的介电特性（高电容，低损耗因数，高绝缘电阻），在高速加速寿命测试中具有出色的性能，以及非常好的耐电介质击穿性能。介电层优选以BaTiO3为主要成分，Mn3O4，Y2O3，Ho2O3，CaCO3，SiO2，B2O3，Al2O3，MgO，CaO为次要成分。它们的分批比例优选为99.00至98.5重量％。％BaTiO 3，0.336〜0.505wt。％Mn 3 O 4，0.198〜0.296重量％％Y 2 O 3，0.132〜0.198重量％％Ho2O3，0.199〜0.299wt。％CaCO 3，0.057〜0.085重量％％SiO 2，0.039〜0.058重量％％B 2 O 3，0.018〜0.027重量％％Al 2 O 3，0.016〜0.025重量％％MgO和0.005〜0.007wt。％CaO。 B 2 O 3，SiO 2，MgO，Al 2 O 3和CaO优选以预反应玻璃的形式存在。本发明的优选形式可以在还原气氛中在1200至1300℃的温度范围内烧结。此外，可以在烧结循环期间利用再氧化工艺来优化陶瓷对绝缘击穿的电阻。

3. 发明申请

US20040214712A1 High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer and communication system 失效
标题翻译：高频介电陶瓷组合物，介质谐振器，介质滤波器，介质双工器和通讯系统
公开(公告)号：US20040214712A1
公开(公告)日：2004-10-28
申请号：US10816946
申请日：2004-04-05
发明人： Tsutomu Tatekawa
IPC分类号： C04B035/468
CPC分类号： C04B35/457 , C04B35/495 , C04B2235/3206 , C04B2235/3215 , C04B2235/3244 , C04B2235/3251 , C04B2235/3293 , C04B2235/72 , H01P7/10
摘要： A high-frequency dielectric ceramic composition that has a high Q-factor as well as a large relative dielectric constant, and in which temperature coefficient of the resonant frequency (nullr) can be controlled to around 0 ppm/null C. is provided. The dielectric ceramic composition has a general formula of Banull(SnnullZr1-null)xMgy(NbnullTa1-null)znullvOw, wherein molar ratios x, y, and z are within an area defined by points A (0.30, 0.22, 0.48), B (0.60, 0.12, 0.28), C (0.60, 0.14, 0.26), and D (0.30, 0.25, 0.45) in a ternary diagram, and are not on the line between points A and D, xnullynullznull1.00, 0.5nullnullnull1.0, 0nullnull
摘要翻译：提供了具有高Q因子以及较大相对介电常数的高频介电陶瓷组合物，其中共振频率（Taur）的温度系数可被控制在约0ppm /℃。电介质陶瓷组合物具有通式Ba [（SnalphaZr1-α）xMgy（NbbetaTa1-β）z] vOw，其中摩尔比x，y和z在由点A（0.30,0.22,0.48），B（0.60,0.12,0 .28），C（0.60,0.14,0.26）和D（0.30,0.25,0.45），并且不在点A和D之间的线上，x + y + z = 1.00，0.5 <=α<= 1.0,0 <=β<1.0,0.98 <= v <= 1.03，w是保持组成电中性的正值。

4. 发明申请

US20020072464A1 Dielectric ceramic, process for producing the same and multilayer ceramic capacitor 有权
标题翻译：介电陶瓷，制造相同和多层陶瓷电容器的工艺
公开(公告)号：US20020072464A1
公开(公告)日：2002-06-13
申请号：US09982361
申请日：2001-10-18
申请人： Murata Manufacturing Co., Ltd.
发明人： Tomoyuki Nakamura , Kentaro Sakai , Harunobu Sano
IPC分类号： C04B035/468 , C04B035/47 , C04B035/46 , C04B035/48 , C04B035/49
CPC分类号： H01G4/1245 , B32B18/00 , C04B35/4682 , C04B2235/6567 , C04B2235/658 , C04B2237/346 , C04B2237/66 , C04B2237/704 , H01G4/1227 , H01G4/1236
摘要： A dielectric ceramic includes ABO3 as a major component and R and M as accessory components, where A is at least one of Ba, Sr and Ca; B is at least one of Ti, Zr and Hf; R is at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y; and M is at least one of Ni, Co, Fe, Cr and Mn. The dielectric ceramic contains the components R and M at about 70% or more of analysis points in grain boundaries. This dielectric ceramic is suitable for use in dielectric ceramic layers of a multilayer ceramic capacitor obtained by firing in a reducing atmosphere, has a long life at high temperatures and high voltages, exhibits less time-dependent change in electrostatic capacity under application of a direct-current voltage and has satisfactory reliability even when its thickness is reduced.
摘要翻译：介电陶瓷包括ABO 3作为主要成分，R和M作为辅助成分，其中A是Ba，Sr和Ca中的至少一种; B是Ti，Zr和Hf中的至少一种; R是La，Ce，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb，Lu和Y中的至少一种; M是Ni，Co，Fe，Cr和Mn中的至少一种。电介质陶瓷含有在晶界分析点的约70％以上的成分R和M。该电介质陶瓷适用于通过在还原气氛中烧制而获得的多层陶瓷电容器的介电陶瓷层，在高温和高电压下具有长寿命，在施加直流电压时具有较小的静电容量变化，即使当其厚度减小时也具有令人满意的可靠性。

5. 发明申请

US20020058580A1 High dielectric constant very low fired X7R ceramic capacitor, and powder for making 失效
标题翻译：高介电常数非常低的X7R陶瓷电容器和粉末制造
公开(公告)号：US20020058580A1
公开(公告)日：2002-05-16
申请号：US10036205
申请日：2001-12-29
发明人： Galeb H. Maher , Samir Maher
IPC分类号： C04B035/468 , C04B035/495
CPC分类号： C04B35/6303 , B32B18/00 , B32B2311/08 , C04B35/465 , C04B35/468 , C04B35/4682 , C04B35/628 , C04B2235/3201 , C04B2235/3206 , C04B2235/3208 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3229 , C04B2235/3232 , C04B2235/3236 , C04B2235/3239 , C04B2235/3244 , C04B2235/3251 , C04B2235/3255 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3294 , C04B2235/3409 , C04B2235/365 , C04B2235/5436 , C04B2235/5445 , C04B2235/656 , C04B2235/77 , C04B2235/78 , C04B2235/785 , C04B2235/786 , C04B2235/79 , C04B2237/346 , C04B2237/40 , C04B2237/408 , H01G4/1218 , H01G4/1227 , H01G4/1245 , H01G4/30
摘要： A dielectric ceramic powder and multilayer ceramic capacitors made from the powders are disclosed. A dielectric start powder mixture includes at least ninety weight percent essentially pure barium titanate powder having an average particle size of from 0.2 to 1.2 microns; from 0.2 to 2.5 weight percent of barium lithium borosilicate; from 0.1 to 0.3 weight percent of MnCO3; 0.4 to 1.50 weight percent Nb205 or a niobate compound, or a molar equivalent of Ta2O5 or a tantalum compound as a grain growth inhibitor; and, 0.4 to 1.2 weight percent of gadolinium oxide (Gd2O3). The start powder mixture is calcined and then sintered in an open zirconia setter at from 950null C. to 1,025null C. to produce a dielectric ceramic body that satisfies X7R capacitor performance characteristics; that includes no hazardous heavy metal oxides; and, that may include silver-palladium electrodes having 85 weight percent or more of silver.
摘要翻译：公开了由粉末制成的电介质陶瓷粉末和多层陶瓷电容器。电介质起始粉末混合物包含平均粒度为0.2-1.2微米的至少90重量％的基本上纯的钛酸钡粉末; 0.2至2.5重量％的硼硅酸钡锂; 0.1〜0.3重量％的MnCO 3; 0.4〜1.50重量％的Nb 2 O 5或铌酸盐化合物，或摩尔当量的Ta 2 O 5或钽化合物作为晶粒生长抑制剂; 和0.4〜1.2重量％的氧化钆（Gd 2 O 3）。将起始粉末混合物煅烧，然后在开放式氧化锆固定器中在950℃至1050℃下烧结以制备满足X7R电容器性能特征的电介质陶瓷体; 不含有害重金属氧化物; 并且可以包括具有85重量％或更多银的银 - 钯电极。

6. 发明申请

US20020016249A1 Dielectric ceramic composition and ceramic capacitor 有权
标题翻译：介电陶瓷组合物和陶瓷电容器
公开(公告)号：US20020016249A1
公开(公告)日：2002-02-07
申请号：US09894004
申请日：2001-06-29
发明人： Kenji Saito , Koichiro Morita , Youichi Mizuno , Yasunobu Kawamoto , Yoshikazu Okino , Noriyuki Kohzu , Hirokazu Chazono
IPC分类号： C04B035/468
CPC分类号： H01G4/1227 , C04B35/468
摘要： A ceramic capacitor containing at least one dielectric layer formed from a dielectric ceramic composition comprising a sintered body containing ceramic particles having a core/shell structure in an amount of 15% or more based on the total ceramic particles of the sintered body, the core/shell structured particle being composed of a core portion, which is BaTiO3 crystal, and a shell portion surrounding the core portion, which is made of a solid solution comprising BaTiO3 as a major component, has excellent temperature characteristics and a long life-time.
摘要翻译：一种陶瓷电容器，其包含由介电陶瓷组合物形成的至少一个电介质层，所述电介质陶瓷组合物包含基于所述烧结体的总陶瓷颗粒，所述芯/壳结构的核/壳结构的核/壳结构含有陶瓷颗粒的烧结体的15％由BaTiO 3晶体的芯部构成的壳结构粒子和由包含BaTiO 3作为主要成分的固溶体构成的芯部的壳部，具有优异的温度特性和长的寿命。

7. 发明申请

US20020016247A1 Dielectric ceramic composition and ceramic capacitor 有权
标题翻译：介电陶瓷组合物和陶瓷电容器
公开(公告)号：US20020016247A1
公开(公告)日：2002-02-07
申请号：US09893701
申请日：2001-06-29
发明人： Youichi Mizuno , Hisamitsu Shizuno , Kenji Saito , Yasunobu Kawamoto
IPC分类号： C03C014/00 , C04B035/468
CPC分类号： C04B35/468
摘要： The ceramic capacitor in accordance with the present invention is fabricated by employing a dielectric ceramic composition in forming dielectric layers thereof, wherein the dielectric ceramic composition contains an oxide of Ba and Ti, an oxide of Re (Re used herein represents one or more rare-earth elements selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Tb and Y), an oxide of Mg, one or more oxides selected from oxides of Mn, V and Cr, an oxide of Mo and/or W and SiO2 or a glass component including SiO2, wherein the amount of the oxide of Ba and Ti is 100 mol % in terms of BaTiO3, the amount of the oxide of Re is 0.25 to 1.5 mol % in terms of Re2O3, the amount of the oxide of Mg is 0.2 to 1.5 mol % in terms of MgO and the amount of one or more oxides of Mn, V or Cr is 0.03 to 0.6 mol % in terms of Mn2O3, V2O5, Cr2O3, respectively, and the amount of the oxide of Mo and/or W is 0.025 to 0.25 mol % in terms of MoO3 and WO3.
摘要翻译：根据本发明的陶瓷电容器是通过在介电层中形成电介质陶瓷组合物来制造的，其中介电陶瓷组合物含有Ba和Ti的氧化物，Re（Re）的氧化物表示一种或多种稀有金属，选自Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Tb和Y的地球元素），Mg的氧化物，选自Mn，V和Cr的氧化物中的一种或多种氧化物，Mo和/ 或W和SiO 2或包含SiO 2的玻璃组分，其中Ba和Ti的氧化物的量以BaTiO 3换算为100mol％，Re的氧化物的量以Re 2 O 3换算为0.25至1.5mol％，量的Mg的氧化物为0.2〜1.5摩尔％，Mn，V或Cr的一种以上的氧化物的含量分别为Mn 2 O 3，V 2 O 5，Cr 2 O 3为0.03〜0.6摩尔％ Mo和/或W的氧化物以MoO 3和WO 3换算为0.025〜0.25摩尔％。

8. 发明申请

US20020013213A1 Dielectric ceramics and electronic component 失效
标题翻译：介电陶瓷和电子元件
公开(公告)号：US20020013213A1
公开(公告)日：2002-01-31
申请号：US09835492
申请日：2001-04-17
申请人： TDK CORPORATION
发明人： Shigeki Sato , Yoshihiro Terada , Yoshinori Fujikawa
IPC分类号： C04B035/468
CPC分类号： H01G4/1227
摘要： Provided are dielectric ceramics and an electronic component capable of enhancing the longevity of insulation resistance under load at high temperature, namely, the so-called lifetime of IR degradation. A dielectric layer comprises dielectric ceramics containing BaTiO3 that is a main component; a first auxiliary component containing at least one element in a group consisting of Mg, Ca, Ba, Sr and Cr; a second auxiliary component containing SiO2; a third auxiliary component containing at least one element in a group consisting of V, Mo and W; and a fourth auxiliary component containing at least one element in a group consisting of Er, Tm, Yb, Y, Dy and Ho. Preferably, the rate of existence of crystal particles having voids in the dielectric ceramics is 10% or lower in terms of the count rate, and an average crystal particle diameter is more than 0.1 nullm and not more than 0.7 nullm. Thus, the lifetime of IR degradation is improved. Preferably, BaTiO3 powders synthesized by oxalate process or solid phase method and having a Ba/Ti ratio of more than 1 and less than 1.007 are used as a raw material.
摘要翻译：提供了电介质陶瓷和能够提高耐高温下的负载下的绝缘电阻的寿命的电子部件，即所谓的IR降解的寿命。电介质层包含作为主要成分的含有BaTiO 3的电介质陶瓷; 包含由Mg，Ca，Ba，Sr和Cr组成的组中的至少一种元素的第一辅助组分; 含有SiO 2的第二辅助组分; 包含由V，Mo和W组成的组中的至少一种元素的第三辅助组分; 以及包含由Er，Tm，Yb，Y，Dy和Ho组成的组中的至少一种元素的第四辅助成分。优选地，在电介质陶瓷中具有空隙的晶体颗粒的存在速率以计数率计为10％以下，平均结晶粒径为0.1μm以上且0.7μm以下。因此，IR降解的寿命得到改善。优选使用通过草酸盐法或固相法合成并具有大于1且小于1.007的Ba / Ti比的BaTiO 3粉末作为原料。

9. 发明申请

US20010008866A1 BARIUM TITANATE SEMICONDUCTOR CERAMIC 有权
标题翻译：钛酸钡半导体陶瓷
公开(公告)号：US20010008866A1
公开(公告)日：2001-07-19
申请号：US09157062
申请日：1998-09-18
发明人： MITSUTOSHI KAWAMOTO , HIDEAKI NIIMI , RYOUICHI URAHARA , YUKIO SAKABE
IPC分类号： C04B035/468
CPC分类号： B82Y30/00 , C01G23/006 , C01P2002/50 , C01P2002/76 , C01P2002/77 , C01P2004/62 , C01P2004/64 , C04B35/4682
摘要： The present invention provides barium titanate semiconductive ceramic having low specific resistance at room temperature and high withstand voltage, which fully satisfies the demand for enhancing withstand voltage. The average ceramic grain size of the barium titanate semiconductive ceramic is controlled to about 0.9 nullm or less. By this control, the ceramic possesses low specific resistance at room temperature and high withstand voltage fully satisfying a recent demand for enhancing withstand voltage and may suitably used for applications such as controlling temperature and limiting current, or in exothermic devices for constant temperature. Accordingly, the barium titanate semiconductive ceramic enables an apparatus using the same to have enhanced performance and reduced size.
摘要翻译：本发明提供了在室温下具有低电阻率和高耐受电压的钛酸钡半导体陶瓷，其完全满足提高耐电压的要求。钛酸钡半导体陶瓷的平均陶瓷粒径控制在0.9μm以下。通过该控制，陶瓷在室温下具有低的电阻率和高耐受电压，完全满足了近来对提高耐受电压的要求，并且可以适用于诸如控制温度和限制电流的应用，或用于恒温的放热装置中。因此，钛酸钡半导体陶瓷使得能够使用其的装置具有增强的性能和减小的尺寸。

10. 发明申请

US20040220044A1 Ceramic composition and method 失效
标题翻译：陶瓷成分及方法
公开(公告)号：US20040220044A1
公开(公告)日：2004-11-04
申请号：US10425161
申请日：2003-04-29
发明人： Jeffrey R. Jacquin , Randy E. Rose
IPC分类号： C04B035/468
CPC分类号： H01P1/2056 , C04B35/4686 , H05K1/0306
摘要： A ceramic material suitable for use as a microwave band filter for telecommunications equipment comprises oxides of titanium, barium, neodymium, samarium, and optionally, bismuth, and containing, on an elemental weight basis: about 28 to about 31 weight % titanium, about 19 to about 21 weight % barium, about 11 to about 18 weight % samarium, about 7 to about 13 weight % neodymium, up to about 3 weight % of bismuth, and the remainder substantially being oxygen. The ceramic compositions have a resonant frequency, f, in the range of about 2000 MHz to about 2300 MHz, a quality factor, Q, of at least about 4000, a dielectric constant, K, in the range of about 50 to about 70, and a temperature coefficient of resonant frequency, Tf, in the range of about 0 ppm to about null20 ppm. Calcined metal oxide powders useful for preparing the microwave ceramic materials, a method of making the ceramic materials, and devices containing the ceramic materials are also described.
摘要翻译：适合用作通信设备的微波带滤波器的陶瓷材料包括钛，钡，钕，钐和任选的铋的氧化物，并且以元素重量计含有约28至约31重量％的钛，约19 至约21重量％的钡，约11至约18重量％的钐，约7至约13重量％的钕，至多约3重量％的铋，其余基本上是氧。陶瓷组合物具有在约2000MHz至约2300MHz的范围内的谐振频率f，至少约4000的品质因数Q，介电常数K在约50至约70的范围内，和共振频率Tf在约0ppm至约+20ppm的范围内的温度系数。还描述了可用于制备微波陶瓷材料的煅烧金属氧化物粉末，制备陶瓷材料的方法以及包含陶瓷材料的装置。

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