Add time:07/19/2019         Source:sciencedirect.com

Barium strontium titanate (Ba1-xSrxTiO3, BST) and strontium barium niobate (SrxBa1-xNb2O6, SBN) are important ferroelectric materials with excellent pyroelectric, dielectric properties and faster response time of infrared radiation. SBN/BST composite ceramics with different mole ratios of Nb and Ti were fabricated using a powder-sol (P-S) method with Nb2O5 fine powders suspended in the barium strontium titanate (BST in short) sol solution. The X-ray diffraction results indicate that three intermediate phases, i.e. TiO2, BaNb2O6 and SrNb2O6, are developed during the formation of SBN-BST. Powders obtained from dried gels are calcined at 800 ? for 3 h. The Ti2p spectra of only one spin-orbit doublet are observed, which indicates one 4+ chemical state in the composite ceramics. The binding energies of Nb element depend strongly on composition.

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