|About this Abstract
||Materials Science & Technology 2012
||Advances in Dielectric Materials and Electronic Devices
||Textured Sodium Bismuth Titanate Ceramics Prepared by Rotating Magnetic Field and Their Property
||Satoshi Tanaka, Mitsuru Imai, Zenji Kato, Hiroyuki Shimizu, Yutaka Doshida, Keizo Uematsu
|On-Site Speaker (Planned)
Crystal oriented sodium bismuth titanate ceramics were fabricated by colloidal processing in a magnetic field and subsequent sintering. Sodium bismuth titanate with barium titanate (BNBT) with tetragonal crystal systems were oriented by the rotating magnetic field. A mold filled with BNBT slurry was placed and rotated horizontally in the magnetic field 10T. The XRD showed c-axis orientation. On the other hnads, sodium bismuth titanate (BNT) was fabricated by magnetic orientation and reaction sintering. Bismuth titanate (BiT) and sodium titanate (NT) powders were used as raw materials, because BNT was not oriented for symmetrical crystal in magnetic field. BiT particles with tetragonal crystal system were oriented in the magnetic field, so the powder compact consisted from ab-axis oriented BiT and random-oriented NT. The reaction sintering of BiT and NT resulted in the c-axis oriented BNT ceramics. For both cases, improvement of electrical property was achived by textured microstucrutrue.