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    • 10. 发明申请
    • Laminated Ceramic Capacitor
    • 层压陶瓷电容器
    • US20080253060A1
    • 2008-10-16
    • US10593342
    • 2005-02-23
    • Kazushige ItoHaruya HaraToshihiro IguchiShigeki SatoAkira SatoTakashi Kojima
    • Kazushige ItoHaruya HaraToshihiro IguchiShigeki SatoAkira SatoTakashi Kojima
    • H01G4/12
    • C04B35/4682B32B18/00B32B2311/22C04B35/64C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3224C04B2235/3225C04B2235/3239C04B2235/3241C04B2235/3256C04B2235/3258C04B2235/3262C04B2235/3418C04B2235/3436C04B2235/3454C04B2235/5409C04B2235/5436C04B2235/6582C04B2235/6584C04B2235/662C04B2235/782C04B2235/785C04B2237/346C04B2237/40C04B2237/405C04B2237/704C04B2237/706H01B3/12H01G4/1227
    • To provide a multilayer ceramic capacitor which has capacitance-temperature characteristics satisfying the X8R characteristic specified by the EIA standard and has capacitance with an excellent long-term stability.The object is achieved by a multilayer ceramic capacitor comprising a laminate including alternately stacked dielectric layers of a sintered compact composed of crystal particles of a dielectric porcelain composite and internal-electrode layers. The dielectric porcelain composite comprises a primary constituent containing barium titanate; a first accessory constituent composed of at least one of MgO, CaO, BaO, and SrO; a second accessory constituent containing silicon oxide as a major constituent; a third accessory constituent composed of at least one of V2O5, MoO3, and WO3; a fourth accessory constituent composed of an oxide of R1 (wherein R1 is at least one of Sc, Er, Tm, Yb, and Lu); a fifth accessory constituent composed of CaZrO3 or a combination of CaO and ZrO2; and a sixth accessory constituent composed of an oxide of R2 (wherein R2 is at least one of Y, Dy, Ho, Tb, Gd, and Eu). In the case of 100 moles of barium titanate, there are 0.1 to 3 moles of the first accessory constituent, 2 to 10 moles of the second accessory constituent, 0.01 to 0.5 moles of the third accessory constituent, 0.5 to 7 moles of the fourth accessory constituent (wherein the number of moles of the fourth accessory constituent is that of R1 alone), more than 0 but not more than 5 moles of the fifth accessory constituent, and more than 0 but not more than 9 moles of the sixth accessory constituent. The crystal particles constituting the dielectric layers have an average particle diameter of not less than 0.2 μm and less than or equal to 0.55 μm.
    • 提供具有满足EIA标准规定的X8R特性的电容温度特性并具有优异的长期稳定性的电容的多层陶瓷电容器。 该目的是通过一种层叠陶瓷电容器来实现的,所述多层陶瓷电容器包括由电介质瓷复合材料和内部电极层的晶体颗粒构成的烧结体的交替层叠电介质层的叠层体。 介电瓷复合材料包含含钛酸钡的主要成分; 由MgO,CaO,BaO和SrO中的至少一种构成的第一辅助成分; 含有氧化硅作为主要成分的第二辅助成分; 由V 2 O 5,MoO 3 3和WO 3 3中的至少一种构成的第三辅助成分; 由R1的氧化物(其中R1是Sc,Er,Tm,Yb和Lu中的至少一种)组成的第四附属成分; 由CaZrO 3 3或CaO和ZrO 2 2的组合组成的第五附属成分; 和由R2的氧化物(其中R2是Y,Dy,Ho,Tb,Gd和Eu中的至少一种)构成的第六附属成分。 在100摩尔钛酸钡的情况下,第一辅助成分为0.1〜3摩尔,第二副成分为2〜10摩尔,第三副成分为0.01〜0.5摩尔,第四附属物为0.5〜7摩尔 构成(其中第四辅助成分的摩尔数为单独的R1的摩尔数),大于0但不超过5摩尔的第五附属成分,大于0但不大于9摩尔的第六附属成分。 构成电介质层的结晶粒子的平均粒径为0.2μm以上且小于等于0.55μm。