Title:
DIELECTRIC CERAMIC MATERIAL AND MULTILAYERED CERAMIC PARTS
Document Type and Number:
Japanese Patent JP3523280
Kind Code:
B2
Abstract:
PURPOSE: To provide a dielectric ceramic material practically sufficient in the microwave dielectric characteristics such as dielectric constant, a dielectric loss a resonance frequency temperature coefficient and capable of lowering firing temperature and also provide multilayer ceramic parts having excellent characteristics such as high Q-value as a resonator.
CONSTITUTION: A dielectric ceramic material has such constituents that when the main component is expressed by a composition formula xBaO.yTiO2.zNd2O3, there is a relation 7≤x≤25, 55≤y≤78 and 10≤z≤25 where x+y+z=100mol%, and BiO2O3 0 to 15wt.%, MnO 0.5 to 1.5wt.%, glass 4 to 25wt.% are added to the main component. Further, in the case a dielectric ceramic material and an inner conductor material are simultaneously fired so as to obtain a multilayer ceramic part, firing is performed desirbly at higher temperature than a melting point of the inner conductor material and under the condition of oxygen partial pressure not exceeding 5×10-2atm.
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Inventors:
Suzuki, Kazuaki
Furubayashi, Makoto
Miura, Taro
Furubayashi, Makoto
Miura, Taro
Application Number:
JP31399792A
Publication Date:
April 26, 2004
Filing Date:
October 29, 1992
Export Citation:
Assignee:
TDK CORP
International Classes:
C04B35/46; H01B1/22; H01B3/12; H01B19/00; H01P7/10; (IPC1-7): H01B19/00; C04B35/46; H01B3/12; H01P7/10
Other References:
ＩＮＴＥＲＣＥＲＡＭ，Ｖｏｌ．３４（１９８５），Ｎｏ．６，ｐ．１７〜１９
Attorney, Agent or Firm:
石井 陽一