XIAO Dingquan, WAN Zheng. Piezoelectfics Acoustooptics, 1999, 21(5): 363–366.
[5]
? EGERTON L, DILLON D M. Piezoelectric and dielectric properties of ceramics in the system potassium–sodium niobate [J]. J Am Ceram Soc, 1959, 42(9): 438–442.
ZHANG Limin, ZHANG Boping, LI Jinfeng et al. J Chin Ceram Soc, 2007, 35(1): 1–5.
[8]
? ZOU T T, WANG X H, WANG H. Bulk dense fine-grain (1–x)BiScO3– xPbTiO3 ceramics with high piezoelectric coefficient [J]. Appl Phys Lett, 2008, 93: 192913-1–192913-3.
[9]
? WANG Y Y, WU J G., XIAO D Q. Microstructure, dielectric, and piezoelectric properties of (Li, Ag, Ta) modified (K0.5Na0.5)NbO3 lead-free ceramics with high Curie temperature [J]. J Appl Phys, 2007, 102: 054101-1–054101-5.
[10]
? WU J G, PENG T, WANG Y Y, et al. Phase structure and electrical properties of (1–x)(K0.48Na0.52)(Nb0.95Ta0.05)O3–xLiSbO3 lead-free piezoelectric ceramics [J] . J Am Ceram Soc, 2008, 91(1): 319–321.
[11]
? SHEN Z Y, ZHEN Y H, WANG K, et al. Influence of sintering temperature on grain growth and phase structure of compositionally optimized high-performance Li/Ta-modified (Na,K)NbO3 ceramics [J]. J Am Ceram Soc, 2009, 92(8): 1748–1752.
? YANG Z P, CHANG Y F, WEI L L. Phase transitional behavior and electrical properties of lead-free (K0.44Na0.52Li0.04)(Nb0.96–xTaxSb0.04)O3 piezoelectric ceramics [J]. Appl Phys Lett, 2007, 90: 042911-1– 042911-3.
[15]
? LI J F, WANG K. Ferroelectric and piezoelectric properties of fine- grained Na0.5K0.5NbO3 lead-free piezoelectric ceramics prepared by spark plasma sintering [J]. J Am Ceram Soc, 2006, 89(2): 706–709.
[16]
? JAEGER R E, EGERTON L. Hot pressing of potassium–sodium niobates [J]. J Am Ceram Soc, 1962, 45(5): 209–213.
[17]
? TAKAHASHI H, NUMAMOTO Y. Lead-free barium titanate ceramics with large piezoelectric constant fabricated by microwave sintering [J]. Jpn J Appl Phys, 2006, 45: L30–L32.
[18]
? BIROL H, DAMJANOVIC D. Preparation and characterization of (K0.5Na0.5)NbO3 ceramics [J]. J Eur Ceram Soc, 2006, 26: 861–866.
[19]
? CHEN I W, WANG X H. Sintering dense nanocrystalline ceramics without final-stage grain growth [J]. Nature, 2000, 404: 168–171.
[20]
? WANG X H, DENG X Y, BAI H L. Two-step sintering of ceramics with constant grain-size,Ⅱ: BaTiO3 and Ni–Cu–Zn ferrite [J]. J Am Ceram Soc, 2006, 89(2): 438–443.
[21]
? MAZAHERI M, ZAHEDI A M, SADRNEZHAAD S K. Two-step sintering of nanocrystalline ZnO compacts: Effect of temperature on densification and grain growth [J]. J Am Ceram Soc, 2008, 91(1): 56–63.
[22]
? KARAKI T, YAN K, ADACHI M. Subgrain microstructure in high- performance BaTiO3 piezoelectric ceramics [J]. J Appl Phys Express, 2008, 1: 111402-1–111402-3.
[23]
? SAITO Y, TAKAO H, TANI T, et al. Lead-free piezoceramics [J]. Nature, 2004, 432: 84–87.
[24]
? GUO Y P, KAKIMOTO K I, OHSATO H. (Na0.5K0.5)NbO3–LiTaO3 lead-free piezoelectric ceramics [J]. J Mater Lett, 2005, 59: 241–244.