Ferroelectric Ba0.7Sr0.3TiO3(BST) and partially Pb2+ substituted for Ba2+ ceramics (Bao.7-xPbx)Sr0.3TiO3 (x=0.1-0.4,BPST) were prepared by using conventional so
Pure and F,GeO2-doped silica glass cut from fiber preforms prepared by plasma assisted chemical vapor deposition(PCVD) were investigated by ultraviolet absorpti