@article { ISI:000227321500008,
	title = {Simple oxalate precursor route for the preparation of barium-strontium titanate: Ba1-xSrxTiO3 powders},
	journal = {Materials Characterization},
	volume = {54},
	number = {1},
	year = {2005},
	month = {JAN},
	pages = {63-74},
	publisher = {ELSEVIER SCIENCE INC},
	type = {Article},
	address = {360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA},
	abstract = {<p>A simple one-step cation-exchange reaction between the stoichiometric solutions of ammonium titanyl oxalate (ATO) and barium hydroxide+strontium nitrate at room temperature (RT) is investigated successfully for the quantitative precipitation of barium-strontium titanyl oxalate (BSTO): Ba1-xSrxTiO(C2O4)(2).4H(2)O (x=0.25) precursor powders with nearly theoretical yield (greater than or equal to99\%). The pyrolysis of BSTO at 730degreesC/4 h in air produced barium-strontium titanate (Ba1-xSrxTiO3; BST) powders. The characterization studies on BSTO and BST powders by using various physico-chemical techniques: micro- and chemical analysis, differential thermal analysis (DTA)/thermo-gavimetric analysis (TGA), XRD, FTIR, X-ray fluorescence (XRF) and scanning electron microscopy (SEM) revealed that the powders formed are cubic, highly pure, stoichiometric and sub-micron-sized with nearly uniform size and shape distribution. The ceramic compacts obtained by sintering the BST pellets at 1300degreesC/4 It showed density similar to95\%, dielectric constant epsilon(Tc)similar to9500, tan delta-0.15\% and T(C)similar to32 degreesC. (C) 2004 Elsevier Inc. All rights reserved.</p>},
	keywords = {barium-strontium titanate, barium-strontium titanyl oxalate, permittivity, XRF},
	issn = {1044-5803},
	doi = {10.1016/j.matchar.2004.11.002},
	author = {Khollam, Y. B. and Deshpande, S. B. and Potdar, H. S. and Bhoraskar, S. V. and Sainkar, S. R. and Date, Sadgopal K.}
}
@article { ISI:000225497800035,
	title = {Synthesis and characterization of microwave-hydrothermally derived Ba1-xSrxTiO3 powders},
	journal = {Materials Letters},
	volume = {59},
	number = {2-3},
	year = {2005},
	month = {JAN},
	pages = {293-296},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Submicron-sized, spherical, stoichiometric strontium substituted barium titanate: Ba0.75Sr0.25TiO3 (BST) powders are prepared by microwave-hydrothermal (MH) route under the MH conditions of 200 degreesC, 200 psi, and 30 min in strongly alkaline conditions (pH\&gt;12) using potassium titanyl oxalate (KTO) and nitrates of Ba and Sr as the starting precursors and KOH as the mineralizer. The characterization studies by XRD, XRF and SEM indicated that stoichiometric cubic BST powders (a(0)=3.992 A) were obtained by adjusting MH conditions mentioned earlier and keeping the (Ba+Sr)/Ti ratio in starting solution slightly in excess (similar to1.06). (C) 2004 Elsevier B.V. All rights reserved.</p>},
	keywords = {barium-strontium titanate, dissolution-recrystallization, Microstructure, microwave-hydrothermal synthesis, mineralizer, SEM, XRD, XRF},
	issn = {0167-577X},
	doi = {10.1016/j.matlet.2004.10.006},
	author = {Deshpande, S. B. and Khollam, Y. B. and Bhoraskar, Y. B. and Date, Sadgopal K. and Sainkara, S. R. and Potdar, H. S.}
}
