Large d33 in (K,Na)(Nb,Ta,Sb)O3-(Bi,Na,K)ZrO3 lead-free ceramics
2014; Royal Society of Chemistry; Volume: 2; Issue: 12 Linguagem: Inglês
10.1039/c3ta15075e
ISSN2050-7488
AutoresXiaopeng Wang, Jiagang Wu, Dingquan Xiao, Xiaojing Cheng, Ting Zheng, Binyu Zhang, Xiaojie Lou, Jianguo Zhu,
Tópico(s)Microwave Dielectric Ceramics Synthesis
ResumoTo protect the environment and human health, it is necessary to develop high-performance lead-free piezoceramics to replace the lead-based ones in some electronic devices. Here we report first a large piezoelectricity in (K,Na)NbO3-based lead-free piezoceramics prepared by the conventional solid-state method. The rhombohedral–tetragonal phase boundary is observed in the ceramics with a composition of 0.04 ≤ x ≤ 0.06. Those ceramics with 0.01 ≤ x ≤ 0.06 possess a good comprehensive performance of d33 (380–460 pC N−1) and TC (170–287 °C). Moreover importantly, a peak d33 of ∼460 pC N−1 is shown in the ceramic with x = 0.04, which is superior to all other reported results of KNN-based ceramics, including the reported results by Saito et al. (Nature, 2004, 432, 84). We believe that such a material system is a very promising candidate for potassium–sodium niobate piezoceramics.
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