Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

• Autor(a) principal: Li,Wei
• Data de Publicação: 2010
• Outros Autores: Xu,Zhijun, Chu,Ruiqing, Fu,Peng, Zang,Guozhong
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Physics
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332010000300018
• topic: Ceramics; Microstructure; Dielectric properties; Piezoelectric properties

Lead-free ceramics Ba(Zr xTi1-x)O3 (x = 0.02-0.2) were prepared using a solid-state reaction technique. The structural and electrical properties were systemically investigated. Crystalline structures and microstructures were analyzed by X-ray diffraction and scanning electron microscope (SEM) at room temperature. All the samples possess pure perovskite structure. A small amount of Zr content has great effect on the microstructure of Ba(Zr xTi1-x)O3 ceramics. The homogeneous microstructure with grain size about 30µm is obtained for the sample at x = 0.05. The phase transitions merge together in one peak for the samples at x = 0.10 and the highest dielectric constant 15900 is obtained for the sample at x = 0.15. The Ba(Zr xTi1-x)O3 ceramics at x=0.05 exhibit excellent piezoelectric properties of high d33 = 208 pC/N, k p = 31.5% and Qm = 500.