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Ca films were deposited directly on Si(100) substrates by Radio Frequency (R.F.) magnetron sputtering system (MS) and subsequent were pre-annealed at 600 °C for 2h in situ. Finally, the samples were annealed again at 750°C, 782°C, 795°C, 800°C and 850°C for 1h in a vacuum furnace by an interdiffusion process between the deposited particles and clusters and Si atoms, respectively. The structural and...
Based on data observed in the blasting vibration test of the K107+157~268 road slope and K107+730~816 road slope of Hurongxie Expressway, an empirical formula for the blast vibration is obtained after the treatment of mathematical regression analysis. The vibration velocity of buildings at the different distance is calculated with this formula. With reference to the permissible safety vibration velocity...
The electronic structure, densities of states and optical properties of the stable orthorhombic BaSi2 have been calculated using the first-principle density function theory pseudopotential method. The results show that BaSi2 is an indirect semiconductor with the band gap of 1.086 eV, the conduction bands are mainly composed of Ba 6s, 5d as well as Si 3p, the valence bands of BaSi2 are mainly composed...
The electronic structures of Mg2Si and Al, Cu doped Mg2Si have been calculated by first-principles pseudo-potential method. The calculated results show that Mg2Si is an indirect semiconductor with the band gap of 0.2994 eV, the valence bands of Mg2Si are composed of Si 3p, Mg 3s, 3p and the conduction bands are mainly composed of Mg 3s, 3p as well as Si 3p. Al-doped Mg2Si sample is n-type semiconductor...
Thin Ca films were deposited directly on Si(100) substrates at the different deposition Ar pressure using radio frequency (R.F.) magnetron sputtering system (MS) and subsequent annealed at 800 Celsius for 2.5 h or 1.5 h in a vacuum furnace, respectively. The double-structure Ca2Si films and Ca5Si3 film are grown directly and individually on Si(100) substrates by an interdiffusion process between the...
In this paper, our previous work on the fabrication of four models involving nanometer-size TiO2 and their environmental applications are reviewed. The material characterization and the ability to remove pollutants in water for four models are examined. The obtained models have exhibited excellent photo electrocatalytic activity, high photoconversion efficiency, superior charge separating ability...
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