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US 2004/0176238 A1Published application
Nonreducing dielectric ceramic, its production method and multilayer ceramic capacitor
OwnerToshiyuki Ito, Harunobu Sanoinventors
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OwnerToshiyuki Ito, Harunobu Sanoinventors
Estimating the term…
A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and whose powder CuKα X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2θ=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.
A nonreducing dielectric ceramic comprising a SrTiO3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and accessory crystal phases including all the crystal phases other than the perovskite crystal phase, wherein the powder CuKα X-ray diffraction pattern thereof has a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases to that of the perovskite crystal phase at 2θ=25° to 35°.
A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and accessory crystal phases including all the crystal phases other than the perovskite crystal phase, wherein the powder CuKα X-ray diffraction pattern thereof has a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases to that of the perovskite crystal phase at 2θ=25° to 35°.
A method for manufacturing a nonreducing dielectric ceramic, comprising:
Dependencies are inferred from the claim text.