"Hiroaki Takeda,Hitomi Akutsu,Joong-Sang Han,Takashi Tateishi,Takuya Hoshina,Takaaki Tsurumi","Properties of Semiconductive BaTiO3-(Bi1/2Na1/2)TiO3 Ceramics Fabricated in Various Atmospheres","5th International Conference on Electroceramics",,,,,,2011,Dec.
"Hiroaki Takeda,Hitomi Akutsu,Joong-Sang Han,Takashi Tateishi,Takuya Hoshina,Takaaki Tsurumi","Effect of Ca2+-doping on Electrical Properties of  BaTiO3-(Bi1/2Na1/2)TiO3 Ceramics","15th US-Japan Seminer on Dielectric and Piezoelectric Ceramics",,,,,,2011,Nov.
"Takashi Tateishi,Joong-Sang Han,Hiroaki Takeda,Takuya Hoshina,Takaaki Tsurumi","Fabrication of Lead-Free Semiconducting Ceramics Using BaTiO3-(Bi1/2Na1/2)TiO3 System by Sintering in Air Atmosphere",,"Key Engin. Mater.",,"Vol. 485",,"pp. 245-248",2011,Mar.
"Hiroaki Takeda,Joong-Sang Han,Takashi Tateishi,Spela Kunej,Colin Leach,Robert Freer,Takuya Hoshina,Takaaki Tsurumi","Characterization of Grain Boundaries of Lead-Free Semiconducting Ceramics using BaTiO3-(Bi1/2K1/2)TiO3 System",,"Key Engin. Mater.",,"Vol. 485",,"pp. 241-244",2011,Mar.
"Hiroaki Takeda,Joong Sang HAN,Masaya Nishida,Tadashi Shiosaki,Takuya Hoshina,Takaaki Tsurumi","Growth and Piezoelectric Properties of Ferroelectric Bi<sub>2</sub>WO<sub>6</sub> Mono-domain Crystals",,"Solid State Communications","Elsevier Ltd.","Vol. 150","No. 17-18","pp. 836-839",2010,May