Title :
Rapid CO2 laser sintering of Ba0.5Sr1.5Na0.6K0.4Nb5O15 piezoelectric ceramic
Author :
Du, Xinyu ; Ji, Lingfei ; Jiang, Yijian
Author_Institution :
Inst. of Laser Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
Dense tungsten bronze Ba0.5Sr1.5Na0.6K0.4Nb5O15 [(BSKNN) x=1.5, y=0.4] piezoelectric ceramic is produced by CO2 laser sintering method of 9 minute duration. The observed XRD spectra indicate that both laser sintered and furnace sintered ceramic are of crystallized tungsten bronze structure. Microstructure examination of both laser and furnace sintered ceramics show the former have smaller grain size, fewer pores and a greater density of 4.87 g/cm3. The laser sintered Ba0.5Sr1.5Na0.6K0.4Nb5O15 [(BSKNN) x=1.5, y=0.4] ceramic demonstrate piezoelectric properties for; maximum reached polarization and remnant polarization, Pm=8.27 muC/cm2 and Pr=3.25 muC/cm2, coercive field of Ec=7.01 kV/cm. The piezoelectric constant d33=55 pC/N.
Keywords :
X-ray diffraction; barium compounds; crystallisation; ferroelectric ceramics; ferroelectric coercive field; ferroelectric transitions; laser sintering; permittivity; piezoceramics; potassium compounds; sodium compounds; strontium compounds; Ba0.5Sr1.5Na0.6K0.4Nb5O15; XRD spectra; coercive field; crystallization; dielectric permittivity; ferroelectric materials; ferroelectric phase transition; furnace sintered ceramics; grain size; laser sintered ceramics; piezoelectric ceramics; piezoelectric constant; piezoelectric properties; rapid CO2 laser sintering method; remnant polarization; time 9 min; Ceramics; Crystallization; Furnaces; Grain size; Laser sintering; Niobium; Piezoelectric polarization; Strontium; Tungsten; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4970-5
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2009.5307604
