TY  - JOUR
AU  - Wang, H.
AU  - Elsebrock, R.
AU  - Schneller, T.
AU  - Waser, R.
AU  - Yao, X.
TI  - Bismuth zinc niobate (Bi1.5ZnNb1.5O7) ceramics derived from metallo-organic decomposition precursor solution
JO  - Solid state communications
VL  - 132
SN  - 0038-1098
CY  - New York, NY [u.a.]
PB  - Elsevier Science
M1  - PreJuSER-40949
SP  - 481 - 486
PY  - 2004
N1  - Record converted from VDB: 12.11.2012
AB  - The preparation, microstructure development and dielectric properties of Bi1.5ZnNb1.5O7 pyrochlore ceramics by metalloorganic decomposition (MOD) route are reported. Homogeneous precalcined ceramic powders of 13-36 nm crystallite size were obtained at temperatures ranging from 500 to 700degreesC. The thermal decomposition/oxidation of the gelled precursor solution was chemically analyzed, TG/DTA, XRD, and SEM, led to the formation of a pure cubic pyrochlore phase with a stoichiometry close to Bi1.5ZnNb1.5O7 which begins to form at 500degreesC. The metallo-organic precursor synthesis method, where Bi, Zn and Nb ions are chelated to form metal complexes, allows the control of Bi/Zn/Nb stoichiornetric ratio on a molecular scale leading to the rapid formation of bismuth zinc niobate (Bi1.5ZnNb1.5O7) ceramic fine powders with pure pyrochlore structure. The powders were pressed into pellets and can be sintered at temperatures as low as 800-1000degreesC. Fine crystalline ceramics with the grain size in the range of 200-500 nm have been obtained at the sintering temperature of 800degreesC. The dielectric Properties in high frequency to microwave range were measured and discussed. (C) 2004 Elsevier Ltd. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000224867300011
DO  - DOI:10.1016/j.ssc.2004.07.071
UR  - https://juser.fz-juelich.de/record/40949
ER  -