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Highly nonlinear low loss double perovskite composite ceramic and preparation method thereof
The invention discloses a highly nonlinear low loss double perovskite composite ceramic and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: firstly calculating and weighing a proper amount of analytically pure Y2O3, CaCO3, CuO and TiO2 powder raw materials according to the stoichiometric ratio of elements in a chemical expression formula Y2x/3Ca(1-x)Cu3Ti4O12; then, ball-milling the mixed raw materials by using a planetary ball mill and drying, grinding and sieving and calcining to obtain uniform mixed powder; and finally preparing a ceramic sample by virtue of a conventional solid phase method to obtain the composite ceramic of copper yttrium titanate and copper calcium titanate. The minimum value of the loss factor tandelta of the composite ceramic can be reduced to 0.02 which is 1/10 of that of a copper calcium titanate single-phase ceramic sample. Furthermore, the nonlinear coefficient reaches 9.88 which is twice that of the copper calcium titanate single-phase ceramic sample. The breakdown field strength is 11.24kV/cm which is improved by an order of magnitude compared with that of the copper calcium titanate single-phase ceramic sample. The composite ceramic disclosed by the invention is simple in process and the prepared composite ceramic has the characteristics of low dielectric loss and high nonlinear coefficient.
Highly nonlinear low loss double perovskite composite ceramic and preparation method thereof
The invention discloses a highly nonlinear low loss double perovskite composite ceramic and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: firstly calculating and weighing a proper amount of analytically pure Y2O3, CaCO3, CuO and TiO2 powder raw materials according to the stoichiometric ratio of elements in a chemical expression formula Y2x/3Ca(1-x)Cu3Ti4O12; then, ball-milling the mixed raw materials by using a planetary ball mill and drying, grinding and sieving and calcining to obtain uniform mixed powder; and finally preparing a ceramic sample by virtue of a conventional solid phase method to obtain the composite ceramic of copper yttrium titanate and copper calcium titanate. The minimum value of the loss factor tandelta of the composite ceramic can be reduced to 0.02 which is 1/10 of that of a copper calcium titanate single-phase ceramic sample. Furthermore, the nonlinear coefficient reaches 9.88 which is twice that of the copper calcium titanate single-phase ceramic sample. The breakdown field strength is 11.24kV/cm which is improved by an order of magnitude compared with that of the copper calcium titanate single-phase ceramic sample. The composite ceramic disclosed by the invention is simple in process and the prepared composite ceramic has the characteristics of low dielectric loss and high nonlinear coefficient.
Highly nonlinear low loss double perovskite composite ceramic and preparation method thereof
LI JIANYING (author) / JIA RAN (author) / WU KANGNING (author) / HOU LINLIN (author) / GAO LU (author) / LI SHENGTAO (author)
2015-04-29
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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