中文摘要：

Ferroelectric barium strontium titanate(BST) glasse ceramics doped with different content of La2O3 were prepared via the melt-quenching technique followed by controlled crystallization. The microstructures of crystallized samples were examined by X-ray diffraction and scanning electron microscopy. Dielectric properties were also investigated. The aliovalent substitution of Ba by La induced dispersion of semiconducting BaxSr1-x TiO3 crystallites sealed in a glassy silicate matrix, which increased the εr and loss tangent values of the BST glasse ceramic. The experimental results indicate that aliovalent substitution is an effective method to process glasse ceramics with better dielectric properties.

英文摘要：

Ferroelectric barium strontium titanate （BST） glass-ceramics doped with different content of La2O3 were prepared via the melt-quenching technique followed by controlled crystallization. The microstructures of crystallized samples were examined by X-ray diffraction and scanning electron microscopy. Dielectric properties were also investigated. The aliovalent substitution of Ba by La induced dispersion of semiconducting BaxSr1-xTi03 crystallites sealed in a glassy silicate matrix, which increased the εr and loss tangent values of the BST glass- ceramic. The experimental results indicate that aliovalent substitution is an effective method to process glass-ceramics with better dielectric properties.