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Lead-free (Li, Na, K)(Nb, Sb)O3 piezoelectric ceramics: effect of Bi(Ni0.5Ti0.5)O3 modification and sintering temperature on microstructure and electrical properties |
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| Authors: | Huabin Yang Changrong Zhou Qin Zhou Changlai Yuan Weizhou Li Hua Wang |
| Affiliation: | 1. School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, Guangxi, People’s Republic of China 3. School of Material Science and Engineering, Central South University, Changsha, 410083, Hunan, People’s Republic of China 2. School of Materials Science and Engineering, Guangxi University, Nanning, 530004, Guangxi, People’s Republic of China |
| Abstract: | Lead-free (1 ? x)(K0.475Na0.475Li0.05)(Nb0.95Sb0.05)O3–xBi(Ni0.5Ti0.5)O3 [(1 ? x)KNNL–xBNiT] piezoelectric ceramics were prepared by conventional solid-state sintering. The effect of BNiT addition and sintering temperature on phase structure, microstructure, and dielectric and piezoelectric properties of (1 ? x)KNNL–xBNiT ceramics was investigated. The results reveal that the addition of small amounts of BNiT causes significant changes in microstructures, crystalline structures, and dielectric and piezoelectric properties. The T c values and dielectric constant at T c of (1 ? x)KNNL–xBNiT ceramics are increased obviously with 0.2 % BNiT addition and decreased with further increasing BNiT content. Enhanced piezoelectric properties are obtained for the sample with x = 0.4 % and synthesized at optimal temperature of 1100 °C, in which d 33 and k p are 253 pC/N and 0.52, respectively. These results show that (1 ? x)KNNL–xBNiT ceramics are promising lead-free piezoelectric materials. |
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