@article { ISI:000232864800029,
	title = {Low temperature synthesis of MgTa2O6 powders},
	journal = {Materials Letters},
	volume = {59},
	number = {29-30},
	year = {2005},
	month = {DEC},
	pages = {3926-3928},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>A combination of digestion and further low temperature calcination to crystallize the product is employed to prepare MgTa2O6 (MT) ceramics. Freshly prepared niobium hydroxide gel is mixed with magnesium hydroxide thoroughly and allowed to react at 100 degrees C under refluxing and stirring conditions for 6-12 h. The X-ray amorphous product so formed is heated at 550 degrees C to form crystalline MgTa2O6. This is the lowest temperature so far reported for the formation of MgTa2O6. For comparison, MT powders were also prepared by the traditional solid state method. Transmission electron microscope (TEM) investigations revealed that the average particle size is 40 nm for the low temperature calcined powders. (C) 2005 Elsevier B.V. All rights reserved.</p>},
	keywords = {Ceramics, Electron microscopy, magnesium tantalate, Oxides, X-ray diffraction},
	issn = {0167-577X},
	doi = {10.1016/j.matlet.2005.07.035},
	author = {Navale, SC and Samuel, V and Ravi, V}
}
@article { ISI:000232196200008,
	title = {TiO2 ceramic varistor modified with tantalum and barium},
	journal = {Materials Science and Engineering B-Solid State Materials for Advanced Technology},
	volume = {123},
	number = {1},
	year = {2005},
	month = {NOV},
	pages = {50-52},
	publisher = {ELSEVIER SCIENCE SA},
	type = {Article},
	address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND},
	abstract = {<p>The non-linear current (I)-voltage (V) characteristics of titanium dioxide doped with small quantities of tantalum and barium (99.9 TiO2 + 0.1 Ta and 99.4 TiO2 + 0.1 Ta + 0.5 Ba, all are in at.\%) were investigated. These samples have the non-linear coefficient (alpha) values of (20-30) with high breakdown voltages (E-B similar to 400-700 V mm(-1)). The pentavalent tantalum acts as donor and increases the electronic conductivity. The higher electrical conductivity and decrease in the breakdown field strength with barium addition is attributed to higher density. The acceptor like surface states formed by barium ions segregate to grain boundaries due size misfit to thereby modifying the electrical barrier characteristics of grain boundaries. (c) 2005 Elsevier B.V. All rights reserved.</p>},
	keywords = {Ceramics, Oxides, TiO2, varistor, X-ray diffraction},
	issn = {0921-5107},
	doi = {10.1016/j.mseb.2005.06.015},
	author = {Gaikwad, A. B. and Navale, SC and Ravi, V}
}
