TY - JOUR
T1 - Investigation of the relations between structure and microwave dielectric properties of divalent metal tungstate compounds
AU - Yoon, Sung Hun
AU - Kim, Dong Wan
AU - Cho, Seo Yong
AU - Hong, Kug Sun
N1 - Funding Information:
This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea.
PY - 2006
Y1 - 2006
N2 - The microwave dielectric characteristics of AWO4 (A = Mg, Zn, Mn, Ca, Sr, Ba) compounds and their relations with structure have been investigated as a function of A cations. Crystal structure was investigated by XRD; the structure changed from wolframite to scheelite with increasing size of A cation. Dielectric properties such as permittivity, temperature coefficient of resonant frequency (τf), and quality factors (Q × f) were found to be correlated with the size of A cations and the structure of compounds. Permittivity decreased with the size of A cations, and temperature coefficient of resonant frequency was correlated with unit cell volume. AWO4 compounds are suitable for the applications of low-k dielectric materials; permittivity = 8-15, τf = -50 to -70, and Q × f = 60,000-70,000.
AB - The microwave dielectric characteristics of AWO4 (A = Mg, Zn, Mn, Ca, Sr, Ba) compounds and their relations with structure have been investigated as a function of A cations. Crystal structure was investigated by XRD; the structure changed from wolframite to scheelite with increasing size of A cation. Dielectric properties such as permittivity, temperature coefficient of resonant frequency (τf), and quality factors (Q × f) were found to be correlated with the size of A cations and the structure of compounds. Permittivity decreased with the size of A cations, and temperature coefficient of resonant frequency was correlated with unit cell volume. AWO4 compounds are suitable for the applications of low-k dielectric materials; permittivity = 8-15, τf = -50 to -70, and Q × f = 60,000-70,000.
KW - Dielectric properties
KW - Microwave processing
KW - Sintering
KW - Substrates
KW - Tungstate
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U2 - 10.1016/j.jeurceramsoc.2005.09.058
DO - 10.1016/j.jeurceramsoc.2005.09.058
M3 - Article
AN - SCOPUS:33645541535
VL - 26
SP - 2051
EP - 2054
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 10-11
ER -