Title :
Synthesis and characterization of cryogenic perovskite ceramics
Author :
Vigliotti, A.J. ; Pilgrim, S.M.
Author_Institution :
NYS Coll. of Ceramics, Alfred Univ., NY, USA
Abstract :
This work is an investigation into the suitability of the complex perovskite ceramic systems Pb(Mg1-xNix)1/3 Ta2/3O3, (PMNiTa), and Sr1-xCa x(Ni1/3Ta2/3)O3, (SCNiTa), for use as an electrostrictive and thus smart material in cryogenic environments. Both systems have been synthesized via conventional mixed oxide, pressed into pellets, and fired at the appropriate temperatures. When x=0.2 the lead-based system has a perovskite yield of 95% with the remainder being a pyrochlore, Pb1.34Ta2O6.34 ; dielectric measurements show an increase in the dielectric constant, K´, with decreasing temperature down to -85°C which agrees with previous work. When x=0.0 the Sr based system, Sr(Ni1/3Ta2/3)O3, is pseudocubic and has a hexagonal superstructure with the values of the lattice constants being in agreement with previous work
Keywords :
calcium compounds; cryogenics; electrostriction; intelligent materials; lead compounds; magnesium compounds; nickel compounds; piezoceramics; strontium compounds; -85 C; PMNiTa; PbMgNiTaO3; SCNiTa; SrCaNiTaO3; cryogenic perovskite ceramic; dielectric constant; electrostrictive smart material; firing; lattice constant; mixed oxide synthesis; pellet; Ball milling; Capacitive sensors; Ceramics; Cryogenics; Dielectric materials; Electrostriction; Fuels; Permittivity; Polarization; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598181
