Details

Autor(en) / Beteiligte

• Lee, Myang Hwan
• Kim, Da Jeong
• Choi, Hae In
• Kim, Myong‐Ho
• Song, Tae Kwon
• Kim, Won‐Jeong
• Park, Jin Su
• Do, Dalhyun

Titel

Low sintering temperature for lead‐free BiFeO 3 ‐BaTiO 3 ceramics with high piezoelectric performance

Ist Teil von

• Journal of the American Ceramic Society, 2019-05, Vol.102 (5), p.2666-2674

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Through modification of the heat‐treatment process using a higher heating rate and a lower binder burnout temperature, the piezoelectric performance of water‐quenched 0.67Bi 1.05 FeO 3 ‐0.33BaTiO 3 (BF33BT) lead‐free piezoelectric ceramics was improved. The observed physical properties of BF33BT ceramics were very sensitive to the process temperatures. The sintering temperature ( T S ) was changed within a narrow temperature range, and its effects were investigated. The largest rhombohedral distortion (90°‐ α R  = 0.14°) and tetragonality ( c T / a T  = 1.022) were observed for the ceramic sintered at 980°C, and its Curie temperature was 476°C. This ceramic showed good piezoelectric properties and large grains; the piezoelectric sensor charge coefficient ( d 33 ) was 352 pC/N, and the piezoelectric actuator charge coefficient ( ) was 270 pm/V. The high piezoelectric performance and low T S of BF33BT ceramics indicate their potential as new low‐cost eco‐friendly lead‐free piezoceramics.