Low temperature sintering of lead-free Bi 0.5(Na 0.82K 0.18) 0.5TiO 3 piezoelectric ceramics by co-doping with CuO and Nb 2O 5

Effect of excess CuO additive on the sintering behavior and piezoelectric properties of Bi 0.5(Na 82K 0.18) 0.5TiO 3 ceramics was investigated. The addition of small amount of excess CuO as low as 1 mol% was quite effective to lower the sintering temperature ( T s ) of BNKT ceramics down to 975 °C w...

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Bibliographic Details
Published inCeramics international Vol. 38; pp. S359 - S362
Main Authors Do, Nam Binh, Jang, Hyun Deok, Hong, Inki, Han, Hyoung Su, Le, Duc Thang, Tai, Weon Pil, Lee, Jae Shin
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2012
Subjects
A. Sintering
C. Piezoelectric properties
D. Perovskites
E. Actuators
E. Actuators
C. Piezoelectric properties
A. Sintering
D. Perovskites
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Summary:Effect of excess CuO additive on the sintering behavior and piezoelectric properties of Bi 0.5(Na 82K 0.18) 0.5TiO 3 ceramics was investigated. The addition of small amount of excess CuO as low as 1 mol% was quite effective to lower the sintering temperature ( T s ) of BNKT ceramics down to 975 °C while their piezoelectric properties were degraded by Cu doping. However, the electric field-induced strain was markedly enhanced by further addition of Nb 2O 5 with CuO without elevating T s . The normalized strain S max/ E max of 427 pm/V was obtained with a specimen sintered with 0.02 mol CuO and 0.03 mol Nb 2O 5 in excess.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.05.012