The effects of an excess of Bi on the piezoelectric and dielectric properties of 0.60Bi1+xFeO3-0.40BaTiO3 (x = 0, 0.01, 0.03, 0.05, 0.07) were investigated. The ceramics were processed through a conventional solid state reaction method and then quenched after sintering at different temperatures in the range of 980~1070 oC. A single perovskite structure without any secondary phase was confirmed for all compositions and temperatures. It was found that excess Bi reduced the sintering temperatures, acted as a sintering aid and enhanced the properties in combination with quenching. Curie temperature (TC) was found to slightly increase due to the presence of excess Bi; electrical properties were also improved by quenching. At x = 0.03 and 1030 oC, remnant polarization (2Pr) was as high as 45.4 μC/cm2 and strain at 40 kV/cm was up to 0.176 %.

• 이재흥(창원대학교 신소재공학부) | Jae Hong Lee
• 이명환(창원대학교 신소재공) | Myang Hwan Lee
• 송태권(창원대학교 신소재공학부) | Tae Kwon Song
• 김원정(창원대학교 물리학과) | Won-Jeong Kim
• 성연수(포항공과대학교 신소재공학과) | Yeon Soo Sung
• 김명호(창원대학교 신소재공학부) | Myong-Ho Kim Corresponding author