Title :
Crystal growth and electrical properties of Pb(Sc1/2Nb 1/2)O3-Pb(Zn1/3Nb2/3)O3 -PbTiO3 ternary system
Author :
Saigo, Yumin ; Ichinose, Noboru ; Hosono, Yasuharu ; Yamashita, Yohachi
Author_Institution :
Sch. of Eng., Waseda Univ., Tokyo, Japan
Abstract :
Single crystals of the xPb(Sc1/2Nb1/2)O3-yPb(Zn1/3 Nb2/3)O3-zPbTiO3 (PSZNT 100x/100y/100z) ternary system have successfully been grown by a flux method using PbO flux. The crystals were grown in a platinum crucible by mass crystallization achieved by the slow cooling of a 55 PbO: 45 PSZNT 10/75/15 (mol%) molten solution from 1,230~1,250°C to 850°C at 1.5~3° C/h. The resulting two types of crystals, 2-5 mm in length with perovskite structure coexist. Inductive Charge Plasma (ICP) chemical analysis revealed that the composition of the pulverized powder of perovskite crystal is Pb(Sc0.23Zn0.16Nb0.55Ti0.15 )O3, which is slightly different from the charged composition of Pb(Sc0.05Zn0.25Nb0.55Ti 0.15)O3. One of the single crystals near the morphotropic phase boundary (MPB) showed a dielectric constant peak of 216°C
Keywords :
crystal growth from melt; crystal structure; crystallisation; ferroelectric materials; lead compounds; permittivity; 1230 to 1250 C; 2 to 5 mm; 216 C; 850 degC; Pb(Sc0.05Zn0.25Nb0.55Ti0.15 )O3; Pb(Sc0.23Zn0.16Nb0.55Ti0.15 )O3; Pb(Sc0.5Nb0.5)O3-Pb(Zn0.33 Nb0.67)O3-PbTiO3; Pb(Sc1/2Nb1/2)O3-Pb(Zn1/3 Nb2/3)O3-PbTiO3; crystal growth; dielectric constant peak; electrical properties; flux method growth; inductive charge plasma chemical analysis; mass crystallization; perovskite structure; slow cooling; Chemical analysis; Cooling; Crystallization; Crystals; Dielectric constant; Niobium; Plasma chemistry; Platinum; Powders; Zinc;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941525
