摘要:
A dielectric ceramic is obtained by the steps of obtaining a reaction product composed of a barium titanate base composite oxide represented by the general formula (Ba1-h-i-mCahSriGdm) k (Ti1-y-j-nZryHfjMgn)O3, in which 0.995≦k≦1.015, 0≦h≦0.03, 0≦i≦0.03, 0.015≦m≦0.035, 0≦y
摘要翻译:通过以下步骤获得电介质陶瓷:通过以下步骤获得由通式(Ba 1-a H a Ca S h Sub)表示的钛酸钡基复合氧化物组成的反应产物 Gd>>)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 其中0.995 <= k <= 1.015,0 <= h <=0.03,0≤i≤0.03,0.015≤m≤0.035 ,0 <= y <0.05,0 <= j <0.05,0 <=(y + j)<0.05和0.015 <= n <= 0.035保持; 混合少于1.5摩尔的Ma(Ba等),小于1.0摩尔的Mb(Mn等)和0.5-2.0摩尔的Mc(Si等)相对于100摩尔的反应产物; 并烧制由此获得的混合物。 该电介质陶瓷具有优异的耐湿性,满足JIS标准的F特性和EIA标准的Y5V特性,其相对介电常数为9000以上,具有优异的高温可靠性。
摘要:
A ceramic capacitor has a dielectric ceramic layer and at least one pair of electrodes. The dielectric ceramic layer has a primary phase and secondary phases, and the size of the secondary phases in the thickness direction of the dielectric ceramic layer is not more than about one-third of the thickness of the dielectric ceramic layer. A method for making the ceramic capacitor includes the steps of mixing compounds constituting secondary phases in a primary phase of a dielectric ceramic, annealing and then pulverizing the mixture to prepare a raw material for the secondary phases, mixing the raw material for the secondary phases with other materials for the dielectric ceramic shaping and sintering the mixture to form a dielectric ceramic, and forming electrodes on the dielectric ceramic. The ceramic capacitor has high insulation resistance, superior load characteristics at high temperatures or high humidity and high weather resistance, even when sintered in a reducing atmosphere.
摘要:
A dielectric ceramic is obtained by the steps of obtaining a reaction product composed of a barium titanate base composite oxide represented by the general formula (Ba1−h−i−mCahSriGdm)k(Ti1−y−j−nZryHfjMgn)O3, in which 0.995≦k≦1.015, 0≦h≦0.03, 0≦i≦0.03, 0.015≦m≦0.035, 0≦y
摘要翻译:通过以下步骤获得电介质陶瓷:通过以下步骤获得由通式(Ba 1-a H a Ca S h Sub)表示的钛酸钡基复合氧化物组成的反应产物 Gd>>)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 其中0.995 <= k <= 1.015,0 <= h <=0.03,0≤i≤0.03,0.015≤m≤0.035 ,0 <= y <0.05,0 <= j <0.05,0 <=(y + j)<0.05,0.015 <= n <= 0.035保持; 混合少于1.5摩尔的Ma(Ba等),小于1.0摩尔的Mb(Mn等)和0.5-2.0摩尔的Mc(Si等)相对于100摩尔的反应产物; 并烧制由此获得的混合物。 该电介质陶瓷具有优异的耐湿性,满足JIS标准的F特性和EIA标准的Y5V特性,其相对介电常数为9000以上,具有优异的高温可靠性。
摘要:
A dielectric ceramic is provided having a high relative dielectric constant, and in the case in which it is used for a multilayer ceramic capacitor, high insulating properties and superior reliability can be obtained even when the thickness of a dielectric ceramic layer is decreased. The dielectric ceramic used for forming the dielectric ceramic layer of a multilayer ceramic capacitor has a composition represented by 100 (Ba1−w−x−mCawSrxGdm)k(Ti1−y−z−nZryHfzMgn)O3+a+pMnO2+qSiO2+rCuO, in which 0.995≦k≦1.010, 0≦w
摘要翻译:提供具有高相对介电常数的电介质陶瓷,并且在其用于多层陶瓷电容器的情况下,即使当电介质陶瓷层的厚度减小时,也可以获得高绝缘性和优异的可靠性。 用于形成多层陶瓷电容器的介电陶瓷层的电介质陶瓷具有由100(Ba1-wx-mCawSrxGdm)k(Ti1-yz-nZryHfzMgn)O3 + a + pMnO2 + qSiO2 + rCuO表示的组成,其中0.995 < = k <= 1.010,0 <= w <0.04,0 <= x <= 0.04,0 <= y <= 0.10,0 <= z <= 0.05,0.015 <= m <= 0.035,0.015 <= n < = 0.035,0.01 <= p <=1.0,0.5≤q≤2.5,0.01≤R≤5.0。 另外,a是相对于3的偏差选择的值,使得主要部件是电中性的。
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:
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.
摘要:
A dielectric ceramic is provided having a high relative dielectric constant, and in the case in which it is used for a multilayer ceramic capacitor, high insulating properties and superior reliability can be obtained even when the thickness of a dielectric ceramic layer is decreased. The dielectric ceramic used for forming the dielectric ceramic layer of a multilayer ceramic capacitor has a composition represented by 100 (Ba1−w−x−mCawSrxGdm)k(Ti1−y−z−nZryHfzMgn)O3+a+pMnO2+qSiO2+rCuO, in which 0.995≦k≦1.010, 0≦w
摘要翻译:提供具有高相对介电常数的电介质陶瓷,并且在其用于多层陶瓷电容器的情况下,即使当电介质陶瓷层的厚度减小时,也可以获得高绝缘性和优异的可靠性。 用于形成多层陶瓷电容器的电介质陶瓷层的电介质陶瓷具有由100(Ba x 1-w x m Ca x Sr Sr x x) (Ti 1-z z)Zr(CH 3)m H z 0 3 + a + pMnO 2 + qSiO 2 + rCuO,其中0.995 <= k < = 1.010,0 <= w <0.04,0 <= x <= 0.04,0 <= y <= 0.10,0 <= z <= 0.05,0.015 <= m <= 0.035,0.015 <= n <= 0.035, 0.01 <= p <= 1.0,0.5 <= q <= 2.5,0.01 <= r <= 5.0。 另外,a是相对于3的偏差选择的值,使得主要部件是电中性的。
摘要:
A dielectric ceramic composition comprises a compound oxide comprising barium titanate BamTiO3 as a major component and RO3/2, CaO, MgO, and SiO2, as accessory components, wherein R is at least one element selected from the group consisting of Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, wherein the compound oxide satisfies the following relationship: 100BamTiO3+aRO3/2+bCaO+cMgO+dSiO2, wherein, on a molar basis, 0.990≦m≦1.030, 0.5≦a≦6.0, 0.10≦b≦5.00, 0.010≦c
摘要翻译:电介质陶瓷组合物包括作为主要成分的复合氧化物,其包含作为主要成分的钛酸钡BamTiO 3和作为附加成分的RO3 / 2,CaO,MgO和SiO2,其中R是选自Y,Sm,Eu中的至少一种元素 ,Gd,Tb,Dy,Ho,Er,Tm和Yb,其中复合氧化物满足以下关系:100BamTiO3 + aRO3 / 2 + bCaO + cMgO + dSiO2,其中,以摩尔计为0.990 <= m <= 1.030 ,0.5 <= a <= 6.0,0.10 <= b <= 5.00,0.010 <= c <1.000和0.05 <= d <2.00。 电介质陶瓷组合物满足由日本工业标准(JIS)定义的B特性和由EIA标准定义的关于静电电容对温度的依赖性的X7R特性,并且具有绝缘电阻和静电电容的大CR产物 。 包含由该介电陶瓷组合物构成的薄电介质层的叠层陶瓷电容器是高度可靠的。
摘要:
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.
摘要:
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.