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The interface is critical for the design of polymer nanocomposites with desirable properties. The effect of interface behavior on the properties of polymer nanocomposites with low nanoparticle loading has been well documented. However, our understanding of the role of the interface in highly filled polymer nanocomposites is still limited because of the lack of comprehensive research work. In this...
CaCu3Ti4O12 (CCTO) exhibiting high dielectric constants has recently attracted considerable attention because of the high dielectric constant of about 105 at radio frequency and good temperature stability over a wide temperature range. But high dielectric loss and low breakdown strength seriously affect its application. B2O3 is chosen as glassy phase and it can make grain grow rapidly and decrease...
CaCu3Ti4O12 ceramics were prepared by coprecipitation method. The pH value of reaction solutions plays an important role in the coprecipitation process. First, the pH value of Ti precursor solution must be controlled at around 3, in order to get clear Ti solution. In addition, the pH value of Ca and Cu precursor solution has a great influence on the properties of both precursor and CaCu3Ti4O12 ceramics...
Recently, universal power law becomes widely used. In this paper, it was used to study the ZnO/Bi2O3 ceramics. Bi2O3 is the only additive of ZnO here in order to directly study the effect of Bi2O3 in ZnO. ZnO samples with different content of Bi2O3 were made by the traditional ceramic technique. Then the microstructure of the acid erosion surface was observed by polarized optical microscope, the dielectric...
The effect of two Ag electrodes on the electrical properties of SrTiO3 ring varistors were presented in this paper. It was found that one of them results in ohmic contact while the other results in non-ohmic contact between electrode and ceramics. Compared with the results achieved by using of In-Ga alloy paste, non-ohimic contact lead to larger varistor voltage U10mA, larger nonlinear coefficient...
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