Imperial College London


Central FacultyOffice of the Provost

Associate Provost (Academic Planning)



+44 (0)20 7594 6724n.alford




Miss Catherine Graham +44 (0)20 7594 3330




2..05 (in RSM) or 3.09 (in the Faculty Building)Royal School of MinesSouth Kensington Campus






BibTex format

author = {Axelsson, AK and Pan, Y and Valant, M and Alford, N},
doi = {10.1111/j.1551-2916.2009.03130.x},
journal = {Journal of the American Ceramic Society},
pages = {1773--1778},
title = {Synthesis, sintering, and microwave dielectric properties of kTaO <inf>3</inf> ceramics},
url = {},
volume = {92},
year = {2009}

RIS format (EndNote, RefMan)

AB - Studies of a synthesis of KTaO3 displayed a two-step reaction path with the intermediate formation of K2Ta4O 11. Thermal and X-ray diffraction analysis showed that the synthesis is completed at 900°C. Sintering studies showed that KTaO3 powder can produce single phase ceramics with 85% of relative density with the addition of 5% of potassium excess when sintered at 1330°C for 1 h. Longer sintering times or higher temperatures result in enhanced potassium loss and consequent formation of K6Ta10.8O30 secondary phase with tetragonal tungsten bronze structure. Room- and low-temperature microwave dielectric properties of KTaO3 ceramics compare well with measurements performed on single crystals. We evaluated the influence of microstructural features (porosity, structural defects, secondary phases) on the dielectric properties of the ceramic samples. © 2009 The American Ceramic Society.
AU - Axelsson,AK
AU - Pan,Y
AU - Valant,M
AU - Alford,N
DO - 10.1111/j.1551-2916.2009.03130.x
EP - 1778
PY - 2009///
SN - 0002-7820
SP - 1773
TI - Synthesis, sintering, and microwave dielectric properties of kTaO <inf>3</inf> ceramics
T2 - Journal of the American Ceramic Society
UR -
VL - 92
ER -