Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials，College of Materials Science and Engineering, North China University of Science and Technology
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DOI:
10.7502/j.issn.1674-3962.2016.02.09
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Abstract:
Capacitor is one of the electronic components which used widely on research about industry, agriculture, national defense, scientific and human daily life. Ceramic capacitor has the characteristics of high temperature resistance, corrosion resistance, high dielectric constant and stable performance. It is able to meet the requirements of miniaturization and high capacity current.Ba1-xCaxZr0.1Ti0.9O3 doped 0.05%Y2O3 （mole percent） dielectric ceramics were prepared by raw materials such as BaCO3, CaCO3, ZrO2 and TiO2. The effect of micromorphology and dielectric properties by adding CaCO3 were studied.The results show that: CaCO3 doping have no effect on the main crystal phase of the sample, but the grain size increases with the addition of CaCO3. When εr of the sample increases at room temperature, tanδ abruptly increases firstly and then decreases. Meanwhile, the curie temperature of the samples moves to a lower temperature, but the phenomenon is not obvious. With decreasing value of εr peak, the temperature change rate is reduced.