Patent application number | Description | Published |
20080252179 | Piezoelectric Element and Method for Manufacturing the Piezoelectric Element - A piezoelectric element includes a piezoelectric ceramic body containing an internal electrode. The piezoelectric ceramic body is mainly made of a perovskite complex oxide containing an alkali metal niobate-based compound containing at least one element selected from among K, Li, and Na. The internal electrode is made of a base metal material, such as Ni or Cu. The piezoelectric element is produced by co-sintering the internal electrode and the piezoelectric ceramic body. Thus, there is provided an inexpensive piezoelectric element that can be properly used in practice even though it has been fired in a reducing atmosphere. | 10-16-2008 |
20090290285 | DIELECTRIC CERAMIC COMPOSITION AND MONOLITHIC CERAMIC CAPACITOR - A dielectric ceramic composition that is used for a monolithic ceramic capacitor, can be cofired with internal electrodes mainly composed of Ni at a temperature of 1200° C. or less, and has a high resistivity is provided. The dielectric ceramic composition is mainly composed of a tungsten bronze type complex oxide having a composition formula of (K | 11-26-2009 |
20100083474 | Piezoelectric Element and Method for Manufacturing the Piezoelectric Element - A piezoelectric element includes a piezoelectric ceramic body containing an internal electrode. The piezoelectric ceramic body is mainly made of a perovskite complex oxide containing an alkali metal niobate-based compound containing at least one element selected from among K, Li, and Na. The internal electrode is made of a base metal material, such as Ni or Cu. The piezoelectric element is produced by co-sintering the internal electrode and the piezoelectric ceramic body. Thus, there is provided an inexpensive piezoelectric element that can be properly used in practice even though it has been fired in a reducing atmosphere. | 04-08-2010 |
20100085681 | DIELECTRIC CERAMIC COMPOSITION AND LAMINATED CERAMIC CAPACITOR - There is provided a dielectric ceramic composition that is a dielectric ceramic material used for a laminated ceramic capacitor; that can be co-fired with internal electrodes mainly composed of Ni at a temperature of 1300° C. or less; and that has a high dielectric constant, good temperature characteristics of capacitance in a range of −55 to 175° C., and a high resistivity ρ at 175° C. The dielectric ceramic composition includes a main component represented by a composition formula (1−a) (K | 04-08-2010 |
20100182733 | Dielectric Ceramic and Laminated Ceramic Capacitor - A dielectric ceramic for use in dielectric ceramic layers has a main component represented by a composition formula of (Sr | 07-22-2010 |
20100195265 | DIELECTRIC CERAMIC AND LAMINATED CERAMIC CAPACITOR - A dielectric ceramic which improves the lifetime characteristics and dielectric breakdown voltage of a laminated ceramic capacitor includes core-shell crystalline grains which have a core-shell structure and homogeneous crystalline grains which have a homogeneous structure. In this dielectric ceramic, the core-shell crystalline grains and the homogeneous crystalline grains are present at an area ratio in the range of 91:9 to 99:1. Preferably, when the mean grain size for the core-shell crystalline grains is represented by R1 and the mean grain size for the homogeneous crystalline grains is represented by R2, the ratio of R2/R1 is 0.8 or more and 3 or less. | 08-05-2010 |
20100195266 | DIELECTRIC CERAMIC AND LAMINATED CERAMIC CAPACITOR - A dielectric ceramic with stable insulation properties even after calcination under a reducing atmosphere, as is preferred for a laminated ceramic capacitor, is a CaTiO | 08-05-2010 |