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	Enhancing electrical properties in NBT-KBT lead-free piezoelectric ceramics by optimizing sintering temperature
	Ya-Ru Zhang ; Jing-Feng Li ; Bo-Ping Zhang
	2010-10-12 ; 2010-10-12
关键词	Experimental/ bismuth compounds densification electromechanical effects piezoceramics potassium compounds sintering sodium compounds solid-state phase transformations/ electrical property lead-free piezoelectric ceramics optimizing sintering temperature densification phase transition rhombohedral symmetry tetragonal symmetry morphotropic phase boundary electromechanical coupling factor temperature 1110 C to 1170 C (Na/sub 1-x/K/sub x/)/sub 0.5/Bi/sub 0.5/TiO/sub 3// A7760 Piezoelectricity and electrostriction A7280S Electrical conductivity of insulators A8120L Preparation of ceramics and refractories A6470K Solid-solid transitions A8120E Powder techniques, compaction and sintering/ temperature 1.38315E+03 to 1.44315E+03 K/ NaKBi0.5TiO3/ss Bi0.5/ss TiO3/ss O3/ss Bi/ss Na/ss Ti/ss K/ss O/ss
中文摘要	Conventional sintering of (Na/sub 1-x/K/sub x/)/sub 0.5/Bi/sub 0.5/TiO/sub 3/ (abbreviated as NKBTx, x = 18-22 mol%) lead-free piezoelectric ceramics was investigated to clarify the optimal sintering temperature for densification and electrical properties. Both sintered density and electrical properties were sensitive to sintering temperature; particularly, the piezoelectric properties deteriorated when the ceramics were sintered above the optimum temperature. The NKBT20 and NKBT22 ceramics synthesized at 1110-1170 degrees C showed a phase transition from tetragonal to rhombohedral symmetry, which was similar to the morphotropic phase boundary (MPB). Because of such MPB-like behavior, the highest piezoelectric constant (d/sub 33/) of about 192 pC/N with a high electromechanical coupling factor (k/sub p/) of about 32% were obtained in the NKBT22 ceramics sintered at 1150 degrees C.
语种	英语
出版者	American Ceramic Society ; USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78314]
专题	清华大学
推荐引用方式 GB/T 7714	Ya-Ru Zhang,Jing-Feng Li,Bo-Ping Zhang. Enhancing electrical properties in NBT-KBT lead-free piezoelectric ceramics by optimizing sintering temperature[J],2010, 2010.
APA	Ya-Ru Zhang,Jing-Feng Li,&Bo-Ping Zhang.(2010).Enhancing electrical properties in NBT-KBT lead-free piezoelectric ceramics by optimizing sintering temperature..
MLA	Ya-Ru Zhang,et al."Enhancing electrical properties in NBT-KBT lead-free piezoelectric ceramics by optimizing sintering temperature".(2010).

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