The electronic structure,including band structure,density of states （DOS）, and partial density of states of SrTi1-xSbxO3 with x = 0,0. 125,0.25,and 0.33 is calculated from the first principles of plane wave ultra-so...The electronic structure,including band structure,density of states （DOS）, and partial density of states of SrTi1-xSbxO3 with x = 0,0. 125,0.25,and 0.33 is calculated from the first principles of plane wave ultra-soft pseudo-potential technology based on density function theory. The calculated results reveal that due to the electron doping,the Fermi level moves into the conduction bands for SrTi1-xSbxO3 with x = 0. 125 and the system shows metallic behavior. In addition, the DOS moves towards low energy and the optical band gap is broadened. The wide band gap and the low density of the states in the conduction band result in the transparency of the films.展开更多
Semiconducting SrTiO 3 based voltage sensing and dielectric ceramics were prepared by single step sintering with Li 2CO 3 SiO 2 as liquid phase additives.The effects of the content of liquid phase,the ratio o...Semiconducting SrTiO 3 based voltage sensing and dielectric ceramics were prepared by single step sintering with Li 2CO 3 SiO 2 as liquid phase additives.The effects of the content of liquid phase,the ratio of Li/Si and the sintering temperatures on properties were discussed in terms of electrical properties and microstructures of materials.The results showed thatSrTiO 3 based varistor ceramics,with 0.6 mol% Li 2CO 3 SiO 2(Li/Si=3/2) and sintered at 1 380 ℃ in graphite and N 2 reducing atomosphere,had excellent current volatage sensing and dielectric characteristics.展开更多
文摘The electronic structure,including band structure,density of states （DOS）, and partial density of states of SrTi1-xSbxO3 with x = 0,0. 125,0.25,and 0.33 is calculated from the first principles of plane wave ultra-soft pseudo-potential technology based on density function theory. The calculated results reveal that due to the electron doping,the Fermi level moves into the conduction bands for SrTi1-xSbxO3 with x = 0. 125 and the system shows metallic behavior. In addition, the DOS moves towards low energy and the optical band gap is broadened. The wide band gap and the low density of the states in the conduction band result in the transparency of the films.
文摘Semiconducting SrTiO 3 based voltage sensing and dielectric ceramics were prepared by single step sintering with Li 2CO 3 SiO 2 as liquid phase additives.The effects of the content of liquid phase,the ratio of Li/Si and the sintering temperatures on properties were discussed in terms of electrical properties and microstructures of materials.The results showed thatSrTiO 3 based varistor ceramics,with 0.6 mol% Li 2CO 3 SiO 2(Li/Si=3/2) and sintered at 1 380 ℃ in graphite and N 2 reducing atomosphere,had excellent current volatage sensing and dielectric characteristics.
