Title:
強い圧電特性を有する強誘電セラミック材料及びその製造方法
Document Type and Number:
Japanese Patent JP3559221
Kind Code:
B2
Abstract:
The present invention relates to the preparation of compositions and/or ferroelectric ceramic materials having niobate anions in combination with lead, barium, lanthanum, and bismuth cations. In preferred embodiments, the compositions comprised the formula Pb(x-3y/2-3z/2)Ba(1-x)LayBizNb2O6, wherein x is from about 0.4 to about 0.6, y is from about 0.01 to about 0.03, and z is from about 0.01 to about 0.03. The compositions may be easily poled, and have unexpectedly high piezoelectric charge coefficients and unexpectedly high dielectric constants. The invention also provides processes for preparing the compositions, ferroelectric ceramic materials, and articles comprising the ferroelectric ceramic materials.
Inventors:
Akera Barnumati
Bhakkalanka Benkata Narasimachalya
Codidas Umaquantum
Bhakkalanka Benkata Narasimachalya
Codidas Umaquantum
Application Number:
JP2000166209A
Publication Date:
August 25, 2004
Filing Date:
June 02, 2000
Export Citation:
Assignee:
Department of Science and Technology
International Classes:
C04B35/00; C04B35/497; C04B35/622; H01B3/12; H01L41/187; (IPC1-7): C04B35/495; H01B3/12; H01L41/187
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Toshio Shirane
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Toshio Shirane