Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
87 (2000), S. 2516-2519
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Pb(Mg1/3Nb2/3)O3 dielectrics modified by CaTiO3 were prepared by a solid-state reaction method, and microstructure analyses were performed together with the dielectric characterization. Solid solutions with cubic perovskite structures were obtained for compositions of 0–60 mol %CaTiO3, and the orthorhombic perovskite structures were observed for compositions near to the end member of CaTiO3 in the present system. The dielectric loss and temperature coefficient could be pronouncedly reduced by incorporating CaTiO3 into Pb(Mg1/3Nb2/3)O3. Low-loss dielectrics (tan δ∼10−4 at 1 MHz) with dielectric constants of 120–262 and small temperature coefficient (τε∼−960 to −1100 ppm/ °C) were obtained, and further improvement of dielectric properties could be expected through structural modifications. Good microwave dielectric properties, ε=172.6 and Qf=1930 GHz, were achieved in a composition of 0.4Pb(Mg1/3Nb2/3)O3/0.6CaTiO3, where the temperature coefficient of resonant frequency τf was estimated as 470 ppm/ °C. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.372212
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