%0 Journal Article
%T Dielectric Spectroscopy of SrTiO3 Ceramics in Wide Frequency Range<br>钛酸锶的宽频带介电谱
%A SHEN Han
%A WANG Wei-Lin
%A XI Xiao-Ling
%A CHEN Min
%A LI Jing-De
%A <br>沈韩
%A 王卫林
%A 席小玲
%A 陈敏
%A 李景德
%J 无机材料学报
%D 2003
%I Science Press
%X By using computer controlled ultra-low frequency dielectric spectrometer and HP4124A impendence analyzer, we measured the frequency domain dielectric spectrum of SrTiO3 ceramics in the frequencies from 10-4Hz to 105Hz. The complex dielectric constants obtained can be well extracted into the summation of two components. The lower frequency one can probably attribute to the motion of space charges in grain boundaries, the higher frequency one can attribute to that within the grains. Further, real permittivity of the latter component changes to be below zero at high frequencies. It indicates that frequency domain method is not a proper method for describing dielectric spectroscopy, while the experimental results can not be explained by traditional dielectric polarization theory.
%K wide frequency range
%K ultra-low frequency
%K dielectric spectroscopy
%K SrTiO3<br>介电谱
%K 钛酸锶
%K 陶瓷
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=42F04636249BED0B&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=CA4FD0336C81A37A&sid=D46BA3D3D4B3C585&eid=3A0155B37D8FF829&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=0&reference_num=7