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Piezoelectric and Dielectric Characteristics of Lithium Potassium Niobate Ceramic System
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2003
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Materials ScienceMaterials EngineeringElectrical EngineeringMixed Ceramic SystemsEngineeringCeramic MaterialCeramic TechnologyApplied PhysicsCeramics MaterialsPotassium NiobatePiezoelectricityPiezoelectric MaterialMetal-ceramic SystemsCeramic PowdersGrain SizeElectrical PropertiesMicrostructureDielectric Characteristics
In this paper, xLi2O-yK2O-(1-x-y)Nb2O5, x = 0 − 1 and y = 0 − 1, system was partially studied using Lithium and Potassium Niobate as sintering materials in order to reduce the sintering temperature. The prepared lithium potassium niobate ceramics are characterized using X-ray diffraction method and grain size have been calculated using SEM photographs; the phase transitions have been observed from DSC experiment. Finally, the piezoelectric and dielectric characteristics of these mixed ceramic systems are also investigated. The planar mode electromechanical coupling coefficient kp reaches 33.5% and two phase transitions (orthorhombic—tetragonal; tetragonal—cubic) have been observed.