Dielectric and Pyroelectric Properties of Y-doped Ba0.6Sr0.3Ca0.1TiO3 Ceramics by Solid-state Reaction Technique

(Ba0.6Sr0.3Ca0.1)1-xYx Ti0.999Mn0.001O3(0≤x≤0.007) ceramics were prepared by the solid-state reaction technique.The effects of Y doping on the microstructure,dielectric properties and pyroelectric properties were investigated.The average grain size decreases with the increase of Y concentration.The dielectric and pyroelectric properties measurement results show that the dielectric constant,dielectric loss,T c and pyroelectric coefficient all initially increase and then decrease with Y concentration.And the pyroelectric figure of merit F d can be improved by the Y doping.The specimen doped with 0.7mol%Y shows a higher maximum F d value of 8.22×10-5 Pa-1/2 under 700 V/mm near 30℃ with the smallest average grain size of 3.1 μm,indicating its promising application in infrared thermal imaging arrays devices.