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1. 发明授权

US06853536B2 Dielectric ceramic, method of producing the same, and monolithic ceramic capacitor 有权
标题翻译：介电陶瓷，其制造方法和单片陶瓷电容器
公开(公告)号：US06853536B2
公开(公告)日：2005-02-08
申请号：US10739088
申请日：2003-12-19
申请人： Tomoyuki Nakamura , Hiroyasu Konaka , Akira Kata , Kazuo Muto , Harunobu Sano
发明人： Tomoyuki Nakamura , Hiroyasu Konaka , Akira Kata , Kazuo Muto , Harunobu Sano
IPC分类号： C04B35/46 , B32B18/00 , C04B35/00 , C04B35/468 , H01B3/12 , H01G4/06 , H01G4/12 , H01G4/30
CPC分类号： H01G4/1227 , B32B18/00 , B32B2311/22 , C04B35/4682 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3281 , C04B2235/3418 , C04B2235/5445 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/761 , C04B2235/85 , C04B2237/346 , C04B2237/405 , C04B2237/704 , H01G4/30
摘要： A dielectric ceramic includes, in composition, a perovskite-type compound having the general formula ABO3 containing Ba, Ca and Ti, and an additive component containing Si, R(La or the like), and M (Mn or the like), the additive component not being solid-dissolved and, moreover, the major component existing in at least 90% of the cross-section of each of the crystal grains of which the number is equal to at least 85% of that of all of the crystal grains contained in the dielectric ceramic, at least the Ba, the Ca, the Ti, the Si, the R, and the M being contained at at least 85% of the analytical points in the crystal grain boundaries of the dielectric ceramic.
摘要翻译：电介质陶瓷的组成包括具有含有Ba，Ca和Ti的通式ABO 3的钙钛矿型化合物和含有Si，R（La等）和M（Mn等）的添加成分，添加剂组分不是固溶的，而且，主要组分存在于每个晶粒的至少90％的横截面中，其数量等于所有晶粒的至少85％包含在电介质陶瓷中，至少Ba，Ca，Ti，Si，R和M含在电介质陶瓷的晶粒边界的至少85％的分析点。

2. 发明授权

US06939822B2 Dielectric ceramic, methods for making and evaluating the same, and monolithic ceramic electronic component 有权
标题翻译：介电陶瓷，制造和评价陶瓷电子元件的方法
公开(公告)号：US06939822B2
公开(公告)日：2005-09-06
申请号：US10352038
申请日：2003-01-28
申请人： Hiroyasu Konaka , Tomoyuki Nakamura , Toshihiro Okamatsu , Harunobu Sano
发明人： Hiroyasu Konaka , Tomoyuki Nakamura , Toshihiro Okamatsu , Harunobu Sano
IPC分类号： C04B35/46 , C04B35/468 , C04B35/48 , H01G4/12 , C04B35/49
CPC分类号： C04B35/48 , B32B18/00 , B32B2311/08 , C04B35/4682 , C04B2235/3203 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3239 , C04B2235/3241 , C04B2235/3262 , C04B2235/3267 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3409 , C04B2235/3418 , C04B2235/36 , C04B2235/6582 , C04B2235/6584 , C04B2235/785 , C04B2235/786 , C04B2235/85 , C04B2237/346 , C04B2237/408 , C04B2237/704 , H01G4/1227 , H01G4/1245
摘要： A dielectric ceramic has a ceramic structure of crystal grains and grain boundaries between the crystal grains. The crystal grains are of a main component represented by the formula ABO3 and an additive containing a rare earth element wherein A is at least one of barium, calcium, and strontium, barium being an essential element, and B is at least one of titanium, zirconium, and hafnium, titanium being an essential element. The average rare earth element concentration in the interior of the crystal grains is about 50% or less the average rare earth element concentration at the grain boundaries. Furthermore, about 20% to 70% of the crystal grains have a rare earth element concentration in the center of the crystal grain of at least about 1/50 the maximum rare earth element concentration in a region extending inward from the surface by a distance corresponding to about 5% of the diameter of the crystal grain.
摘要翻译：电介质陶瓷具有晶粒的陶瓷结构和晶粒之间的晶界。晶粒是由式ABO 3 3表示的主要成分和含有稀土元素的添加剂，其中A是钡，钙和锶中的至少一种，钡是必需元素，以及 B是钛，锆和铪中的至少一种，钛是必需元素。晶粒内部的平均稀土元素浓度约为晶界平均稀土元素浓度的50％以下。此外，约20％至70％的晶粒在晶粒的中心具有至少约1/50的稀土元素浓度，该稀土元素浓度在从表面向内延伸一定距离的区域中的最大稀土元素浓度至约5％的晶粒直径。

3. 发明授权

US06556423B2 Dielectric ceramic, methods for making and evaluating the same, and monolithic ceramic electronic component 有权
公开(公告)号：US06556423B2
公开(公告)日：2003-04-29
申请号：US10092258
申请日：2002-03-07
申请人： Hiroyasu Konaka , Tomoyuki Nakamura , Toshihiro Okamatsu , Harunobu Sano
发明人： Hiroyasu Konaka , Tomoyuki Nakamura , Toshihiro Okamatsu , Harunobu Sano
IPC分类号： H01G406
CPC分类号： C04B35/48 , B32B18/00 , B32B2311/08 , C04B35/4682 , C04B2235/3203 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3239 , C04B2235/3241 , C04B2235/3262 , C04B2235/3267 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3409 , C04B2235/3418 , C04B2235/36 , C04B2235/6582 , C04B2235/6584 , C04B2235/785 , C04B2235/786 , C04B2235/85 , C04B2237/346 , C04B2237/408 , C04B2237/704 , H01G4/1227 , H01G4/1245
摘要： A dielectric ceramic has a ceramic structure of crystal grains and grain boundaries between the crystal grains. The crystal grains are of a main component represented by the formula ABO3 and an additive containing a rare earth element wherein A is at least one of barium, calcium, and strontium, barium being an essential element, and B is at least one of titanium, zirconium, and hafnium, titanium being an essential element. The average rare earth element concentration in the interior of the crystal grains is about 50% or less the average rare earth element concentration at the grain boundaries. Furthermore, about 20% to 70% of the crystal grains have a rare earth element concentration in the center of the crystal grain of at least about {fraction (1/50)} the maximum rare earth element concentration in a region extending inward from the surface by a distance corresponding to about 5% of the diameter of the crystal grain.

4. 发明授权

US07273825B2 Dielectric ceramic and monolithic ceramic capacitor 有权
标题翻译：介质陶瓷和单片陶瓷电容器
公开(公告)号：US07273825B2
公开(公告)日：2007-09-25
申请号：US11657449
申请日：2007-01-25
申请人： Kazuo Muto , Tomoyuki Nakamura , Akira Kato , Harunobu Sano , Takehisa Sasabayashi , Takashi Hiramatsu
发明人： Kazuo Muto , Tomoyuki Nakamura , Akira Kato , Harunobu Sano , Takehisa Sasabayashi , Takashi Hiramatsu
IPC分类号： C04B35/468
CPC分类号： C04B35/49 , B32B2311/12 , B32B2311/22 , C04B35/4682 , C04B35/62665 , C04B35/6303 , C04B2235/3201 , C04B2235/3203 , C04B2235/3205 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3286 , C04B2235/3289 , C04B2235/3291 , C04B2235/3409 , C04B2235/3418 , C04B2235/6025 , C04B2235/656 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/768 , C04B2235/785 , C04B2235/96 , C04B2237/346 , C04B2237/348 , C04B2237/405 , C04B2237/407 , H01B3/12 , H01G4/1227 , H01G4/30
摘要： The dielectric ceramic has a composition represented by general formula 100(Ba1-x-ySrxCay)m(Ti1-zZrz)O3+aBaO+bR2O3+cMgO+dMnO+eCuO+fV2O5+gXuOv (where R is a rare-earth element such as La, Ce or Pr; and XuOv is an oxide group including at least Si); and 0≦x≦0.05, 0≦y≦0.08 (preferably 0.02≦y≦0.08), 0≦z≦0.05, 0.990≦m, 100.2≦(100 m+a)≦102, 0.05≦b≦0.5, 0.05≦c≦2, 0.05≦d≦1.3, 0.1≦e≦1.0, 0.02≦f≦0.15, and 0.2≦g≦2. With this composition, a monolithic ceramic capacitor retaining good dielectric characteristics and temperature characteristics even if a high field strength voltage is applied by further thinning the dielectric layers thereof and having excellent reliability achieving good isolating property, dielectric strength, and high-temperature load life is obtained.
摘要翻译：电介质陶瓷具有由通式100（Ba 1-xy），（C 1 -C 10）m）表示的组成，（Ti 1-z z z z）O 3 + a B a O + b R 2 O 3 3 / 其中R是（C 1 -C 6）烷基，其中R 1是C 1 -C 6烷基，诸如La，Ce或Pr的稀土元素; X 1 O 2 O 3是至少包括Si）的氧化物基团; 并且0 <= x <= 0.05,0 <= y <= 0.08（优选0.02 <= y <= 0.08），0 <= z <= 0.05,0.990 <= m，100.2 <=（100m + a） = 102，0.05 <= b <= 0.5,0.05 <= c <= 2,0.05 <= d <= 1.3,0.1 <= e <= 1.0,0.02 <= f <= 0.15和0.2 <= g < 2。通过这种组成，即使通过进一步减薄其介电层并且具有优异的可靠性获得良好的隔离性，介电强度和高温负载寿命，即使施加高的场强电压，也能保持良好的介电特性和温度特性的单片陶瓷电容器。获得。

5. 发明授权

US06900977B2 Dielectric ceramic, manufacturing method thereof, and multilayer ceramic capacitor 有权
标题翻译：介电陶瓷及其制造方法和多层陶瓷电容器
公开(公告)号：US06900977B2
公开(公告)日：2005-05-31
申请号：US10780720
申请日：2004-02-19
申请人： Tomoyuki Nakamura , Akira Kato , Kazuo Muto , Harunobu Sano
发明人： Tomoyuki Nakamura , Akira Kato , Kazuo Muto , Harunobu Sano
IPC分类号： C04B35/46 , C04B35/00 , H01B3/00 , H01B3/12 , H01G4/06 , H01G4/12 , H01G4/30 , H02H3/00
CPC分类号： H01G4/30 , H01G4/1227 , Y10T29/43
摘要： A dielectric ceramic formed by firing in a reducing atmosphere is provided. A multilayer ceramic capacitor formed by using the aforementioned dielectric ceramic has superior reliability even when the thicknesses of dielectric ceramic layers formed therefrom are reduced. The dielectric ceramic has crystal grains; and crystal boundaries and triple points, which are located between the crystal grains. The crystal grains contain perovskite compound grains composed of a perovskite compound represented by ABO3 (where A is Ba and Ca, or Ba, Ca and Sr; B is Ti, or Ti and a part thereof which is replaced with at least one of Zr and Hf) and crystal oxide grains composed of a crystal oxide containing at least Ba, Ti and Si, and about 80% or more of the number of the triple points each have a cross-sectional area of about 8 nm2 or less.
摘要翻译：提供通过在还原气氛中烧制形成的介电陶瓷。通过使用上述介电陶瓷形成的多层陶瓷电容器即使当由其形成的介电陶瓷层的厚度减小时也具有优异的可靠性。电介质陶瓷具有晶粒; 晶界和三点位于晶粒之间。晶粒含有由ABO 3（其中A为Ba和Ca或Ba，Ca和Sr; B为Ti或Ti的钙钛矿化合物或其一部分为ABO 3 由Zr和Hf中的至少一种替代）和由至少含有Ba，Ti和Si的结晶氧化物组成的晶体氧化物晶粒，并且约80％或更多的三重点数目的截面面积为约 8nm 2以下。

6. 发明申请

US20080112109A1 DIELECTRIC CERAMIC AND MULTILAYER CERAMIC CAPACITOR 有权
标题翻译：电介质陶瓷和多层陶瓷电容器
公开(公告)号：US20080112109A1
公开(公告)日：2008-05-15
申请号：US11947431
申请日：2007-11-29
申请人： Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
发明人： Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
IPC分类号： H01G4/12 , C04B35/00
CPC分类号： 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
摘要： 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.
摘要翻译：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。

7. 发明授权

US07397649B2 Dielectric ceramic and multilayer ceramic capacitor 有权
标题翻译：介质陶瓷和多层陶瓷电容器
公开(公告)号：US07397649B2
公开(公告)日：2008-07-08
申请号：US11947431
申请日：2007-11-29
申请人： Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
发明人： Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
IPC分类号： H01G4/06
CPC分类号： 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
摘要： 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.
摘要翻译：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。

8. 发明申请

US20070142210A1 Dielectric ceramic and monolithic ceramic capacitor 有权
公开(公告)号：US20070142210A1
公开(公告)日：2007-06-21
申请号：US11657449
申请日：2007-01-25
申请人： Kazuo Muto , Tomoyuki Nakamura , Akira Kato , Harunobu Sano , Takehisa Sasabayashi , Takashi Hiramatsu
发明人： Kazuo Muto , Tomoyuki Nakamura , Akira Kato , Harunobu Sano , Takehisa Sasabayashi , Takashi Hiramatsu
IPC分类号： C04B35/468
CPC分类号： C04B35/49 , B32B2311/12 , B32B2311/22 , C04B35/4682 , C04B35/62665 , C04B35/6303 , C04B2235/3201 , C04B2235/3203 , C04B2235/3205 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3286 , C04B2235/3289 , C04B2235/3291 , C04B2235/3409 , C04B2235/3418 , C04B2235/6025 , C04B2235/656 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/768 , C04B2235/785 , C04B2235/96 , C04B2237/346 , C04B2237/348 , C04B2237/405 , C04B2237/407 , H01B3/12 , H01G4/1227 , H01G4/30
摘要： The dielectric ceramic has a composition represented by general formula 100(Ba1-x-ySrxCay)m(Ti1-zZrz)O3+aBaO+bR2O3+cMgO+dMnO+eCuO+fV2O5+gXuOv (where R is a rare-earth element such as La, Ce or Pr; and XuOv is an oxide group including at least Si); and 0≦x≦0.05, 0≦y≦0.08 (preferably 0.02≦y≦0.08), 0≦z≦0.05, 0.990≦m, 100.2≦(100 m+a)≦102, 0.05≦b≦0.5, 0.05≦c≦2, 0.05≦d≦1.3, 0.1≦e≦1.0, 0.02≦f≦0.15, and 0.2≦g≦2. With this composition, a monolithic ceramic capacitor retaining good dielectric characteristics and temperature characteristics even if a high field strength voltage is applied by further thinning the dielectric layers thereof and having excellent reliability achieving good isolating property, dielectric strength, and high-temperature load life is obtained.

9. 发明授权

US06310761B1 Dielectric ceramic composition and monolithic ceramic capacitor 有权
标题翻译：介电陶瓷组合物和单片陶瓷电容器
公开(公告)号：US06310761B1
公开(公告)日：2001-10-30
申请号：US09655071
申请日：2000-09-05
申请人： Kenji Hori , Kotaro Hata , Toshihiro Ikamatsu , Tomoyuki Nakamura , Harunobu Sano
发明人： Kenji Hori , Kotaro Hata , Toshihiro Ikamatsu , Tomoyuki Nakamura , Harunobu Sano
IPC分类号： H01G406
CPC分类号： C04B35/4682 , C01G23/002 , C01P2004/61 , C01P2006/40 , H01G4/1227
摘要： 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.
摘要翻译：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。

10. 发明申请

US20070135295A1 Dielectric ceramic, method for manufacturing dielectric ceramic, and monolithic ceramic capacitor 有权
标题翻译：介电陶瓷，制造介质陶瓷的方法和单片陶瓷电容器
公开(公告)号：US20070135295A1
公开(公告)日：2007-06-14
申请号：US11655132
申请日：2007-01-19
申请人： Takehisa Sasabayashi , Masayuki Ishihara , Tomoyuki Nakamura , Harunobu Sano
发明人： Takehisa Sasabayashi , Masayuki Ishihara , Tomoyuki Nakamura , Harunobu Sano
IPC分类号： C04B35/468
CPC分类号： C04B35/62675 , C01G23/006 , C01P2002/34 , C01P2006/40 , C04B35/4682 , C04B35/6261 , C04B35/62815 , C04B2235/3201 , C04B2235/3203 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3236 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3286 , C04B2235/3289 , C04B2235/3291 , C04B2235/3409 , C04B2235/3418 , C04B2235/656 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/79 , C04B2235/85 , H01G4/1227 , H01G4/30
摘要： Dielectric ceramic having a high dielectric constant of 5,500 or more and exhibiting good dielectric constant temperature characteristic, and a small, high-capacitance monolithic ceramic capacitor having an electrostatic capacitance temperature characteristic satisfying the X5R characteristic are provided. The dielectric ceramic includes a BaTiO3 based or (Ba,Ca)TiO3 based primary component, a rare-earth element and Cu, and has a structure composed of crystal grains and grain boundaries between the crystal grains. The ratio of the average concentration of the rare-earth element in the grain boundaries to the average concentration of the rare-earth element in the inside of the crystal grains is less than 2, and in a cross section of the dielectric ceramic, the rare-earth element is present in 90% or more of the region of first crystal grains, the number of which is 55% to 85% of the crystal grains, and the rare-earth element is present in less than 10% of the region of second crystal grains, the number of which is 15% to 45% of the crystal grains.
摘要翻译：具有高介电常数为5,500以上且具有良好的介电常数温度特性的介质陶瓷，以及具有满足X5R特性的静电电容温度特性的小型高电容性叠层陶瓷电容器。电介质陶瓷包括基于BaTiO 3 3或（Ba，Ca）TiO 3 3基的初级组分，稀土元素和Cu，并且具有由晶粒组成的结构和晶粒之间的晶界。晶粒内稀土类元素的平均浓度与稀土元素在晶粒内部的平均浓度的比例小于2，在电介质陶瓷的截面中，稀有元素在第一晶粒区域的90％以上存在基体元素，其数量为晶粒的55％〜85％，稀土元素的含量少于10％以下第二晶粒，其数量为晶粒的15％至45％。

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