Publication Date:
2011-09-15
Description:
ANbO 3 – BaTiO 3 (A = K, Na, or K 0.5 Na 0.5 ) system ceramics were prepared using a conventional sintering method, and their dielectric properties were investigated. It was found that the dielectric constant of KNbO 3 -BaTiO 3 system ceramics did not strongly depend on temperature between 20 and 400 °C, making them useful for capacitor application. However, the dielectric constant of KNbO 3 -BaTiO 3 system ceramics was low. The high dielectric constant is attributable to a large area of interfaces between KN and BT grains. Ceramics sintered by spark plasma sintering (SPS) are expected to suppress a grain growth, increasing area of the interfacial layer. In this study, SPS method was employed to achieve a large area of the interfaces and to see how the dielectric properties change with the interfacial structure. The structure was controlled by changing sintering temperatures and time of the spark plasma ...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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