Effect of the sintering technique on the ferroelectric and d33 piezoelectric coefficients of Bi0.5(Na0.84K0.16)0.5TiO3ceramic

论文摘要

In the search of lead-free piezoelectric materials,ceramic processing techniques offer potential tools to increase the piezoelectric and ferroelectric properties in addition to new chemical compositions.Powders of pure BNKT16(Bi0.5(Na0.84K0.16)0.5TiO3)phase were synthesized by sol–gel method with a low crystallization temperature（750℃）.Ceramic samples were sintered by pressureless sintering（PLS）,sinter-forging（SF）,and spark plasma sintering（SPS）techniques.Structural,morphological,and chemical characterizations were performed by XRD,Raman,EDS,and SEM.Sintered samples by PLS and SF exhibit rod-like grains associated to bismuth volatility.The highest remanent polarization（11.05μC/cm2）,coercive field（26.2 kV/mm）,and piezoelectric coefficient（165 pC/N）were obtained for SF sample.The piezoresponse force microscopy（PFM）analysis shows that the crystallites at the nanoscale exhibit piezoelectric phenomenon and the highest piezoelectric response is reported for PLS sample.The presence of the rhombohedral phase,the increase in grain and crystallite size,and the oriented rod-like inclusions favoring the crystallographic texture are facts that enhance the piezoelectric coefficient for BNKT16 piezoceramics.

论文目录

• 1 Introduction
• 2 Experimental procedures
• 3 Results and discussion
•   3.1 X‐ray diffraction
•   3.2 Raman spectroscopy
•   3.3 Scanning electron microscopy and energy dispersive spectrometer
•   3.4 Piezoresponse force microscopy
•   3.5 Electrical analysis
• 4 Conclusions
• Electronic Supplementary Material

文章来源

类型: 期刊论文

作者: G.HERNANDEZ-CUEVAS,J.R.LEYVA MENDOZA,P.E.GARCíA-CASILLAS,C.A.RODRíGUEZ GONZáLEZ,J.F.HERNANDEZ-PAZ,G.HERRERA-PéREZ,L.FUENTES-COBAS,S.DíAZ DE LA TORRE,O.RAYMOND-HERRERA,H.CAMACHO-MONTES

来源: Journal of Advanced Ceramics 2019年02期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 无机化工

单位: Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez,Centro de Investigación e Innovación Tecnológica, Instituto Politécnico Nacional,Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México

基金: CONACYT grant A1-S-9232,CONACYT for the Ph.D. scholarship

分类号: TQ174.1

页码: 278-288

总页数: 11

文件大小: 949K

下载量: 17