Hajime Nagata

Best Publications

• Current status and prospects of lead-free piezoelectric ceramics

  Tadashi Takenaka;Hajime Nagata

  1184
  Citations

• Electrical Properties and Depolarization Temperature of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3 Lead-free Piezoelectric Ceramics

  Kazushige Yoshii;Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  602
  Citations

• Large Piezoelectric Constant and High Curie Temperature of Lead-Free Piezoelectric Ceramic Ternary System Based on Bismuth Sodium Titanate-Bismuth Potassium Titanate-Barium Titanate near the Morphotropic Phase Boundary

  Hajime Nagata;Masaki Yoshida;Yoichi Makiuchi;Tadashi Takenaka

  592
  Citations

• Current Developments and Prospective of Lead-Free Piezoelectric Ceramics

  Tadashi Takenaka;Hajime Nagata;Yuji Hiruma

  578
  Citations

• Thermal depoling process and piezoelectric properties of bismuth sodium titanate ceramics

  Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  548
  Citations

• Large electrostrain near the phase transition temperature of (Bi0.5Na0.5)TiO3-SrTiO3 ferroelectric ceramics

  Yuji Hiruma;Yoshitaka Imai;Yoshinori Watanabe;Hajime Nagata

  543
  Citations

• Phase diagrams and electrical properties of (Bi1/2Na1/2)TiO3-based solid solutions

  Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  486
  Citations

• Additive effects on electrical properties of (Bi1/2Na1/2)TiO3 ferroelectric ceramics

  Hajime Nagata;Tadashi Takenaka

  323
  Citations

• Ferroelectric and Piezoelectric Properties of (Bi1/2K1/2)TiO3 Ceramics

  Yuji Hiruma;Rintaro Aoyagi;Hajime Nagata;Tadashi Takenaka

  300
  Citations

• Phase Transition Temperatures and Piezoelectric Properties of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–BaTiO3 Lead-Free Piezoelectric Ceramics

  Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  285
  Citations

• Phase transition temperature and electrical properties of (Bi1∕2Na1∕2)TiO3–(Bi1∕2A1∕2)TiO3 (A=Li and K) lead-free ferroelectric ceramics

  Yuji Hiruma;Kazushige Yoshii;Hajime Nagata;Tadashi Takenaka

  274
  Citations

• Piezoelectric properties in (K 0.5 Bi 0.5 )TiO 3 -(Na 0.5 Bi 0.5 )TiO 3 -BaTiO 3 lead-free ceramics

  Shujun Zhang;T.R. Shrout;H. Nagata;Y. Hiruma

  173
  Citations

• Piezoelectric Properties of (Bi1/2Na1/2)TiO3-Based Solid Solution for Lead-Free High-Power Applications

  Yuji Hiruma;Tomomi Watanabe;Hajime Nagata;Tadashi Takenaka

  173
  Citations

• Phase Transition Temperatures and Piezoelectric Properties of (Bi 1/2 Na 1/2 )TiO 3 -and (Bi 1/2 K 1/2 )TiO 3 -Based Bismuth Perovskite Lead-Free Ferroelectric Ceramics

  T. Takenaka;H. Nagata;Y. Hiruma

  172
  Citations

• Origin of the large piezoelectric activity in ( 1 − x ) Ba ( Z r 0.2 T i 0.8 ) O 3 − x ( B a 0.7 C a 0.3 ) Ti O 3 ceramics

  Matias Acosta;Matias Acosta;Nasser Khakpash;Takumi Someya;Nikola Novak

  143
  Citations

• Piezoelectric Properties of BaTiO3–(Bi1/2K1/2)TiO3 Ferroelectric Ceramics

  Yuji Hiruma;Rintaro Aoyagi;Hajime Nagata;Tadashi Takenaka

  141
  Citations

• Piezoelectric Properties of Bismuth Sodium Titanate Ceramics

  Hajime Nagata;Takashi Shinya;Yuji Hiruma;Tadashi Takenaka

  139
  Citations

• Relaxor-ferroelectric transitions: Sodium bismuth titanate derivatives

  Alisa R. Paterson;Hajime Nagata;Xiaoli Tan;John E. Daniels

  134
  Citations

• Phase Transition Temperatures of Divalent and Trivalent Ions Substituted (Bi1/2Na1/2)TiO3 Ceramics

  Yuji Hiruma;Yoshinori Watanabe;Hajime Nagata;Tadashi Takenaka

  124
  Citations

• (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-BaTiO3-Based Lead-Free Piezoelectric Ceramics

  Yoichi Makiuchi;Rintaro Aoyagi;Yuji Hiruma;Hajime Nagata

  120
  Citations