Characterization of Silicon Dioxide Surfaces by Successive Determinations of the Solution Rate

2009 ◽  
pp. 30-30-18 ◽  
Author(s):  
H Baumann
Keyword(s):  
Silicon Dioxide ◽  
Solution Rate

Characterization of Tunneling Current through Ultrathin Silicon Dioxide Films by Different-Metal Gates Method

2008 ◽  
Vol 47 (11) ◽  
pp. 8317-8320
Author(s):  
Takaaki Hirokane ◽  
Naoto Yoshii ◽  
Tatsuya Okazaki ◽  
Shinichi Urabe ◽  
Kazuo Nishimura ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Tunneling Current ◽  
Metal Gates ◽  
Silicon Dioxide Films

scholarly journals Development and characterization of silicon dioxide clad silicon carbide optics for terrestrial and space applications

2021 ◽  
Author(s):  
Tayaramma D.P.V. Jalluri ◽  
Girish M. Gouda ◽  
Arjun Dey ◽  
B. Rudraswamy ◽  
K.V. Sriram
Keyword(s):  
Silicon Carbide ◽  
Silicon Dioxide ◽  
Space Applications

Fabrication and Characterization of SiO2/TiO2 Nano-Hybrid Particles

2017 ◽  
Vol 727 ◽  
pp. 335-342
Author(s):  
Xiao Fei Qu ◽  
Dan Dan Xie ◽  
Yu Fei Wang ◽  
Kai Wang
Keyword(s):  
Silicon Dioxide ◽  
Hydrothermal Method ◽  
Hydrothermal Time ◽  
Hybrid Particles ◽  
Titanium Tetrafluoride ◽  
Hydrothermal Temperature ◽  
Structures And Properties ◽  
Bet Analysis ◽  
Fabrication And Characterization

SiO2/TiO2 nano-hybrid particles were successfully prepared by hydrothermal method by using titanium tetrafluoride (TiF4) as the titanium source, silicon dioxide as template. The factors of hydrothermal temperature and hydrothermal time on the morphologies and photocatalytic activity of SiO2/TiO2 nano-spheres were systematically discussed in this paper. The structures and properties of the SiO2/TiO2 nano-hybrid particles were studied by some techniques such as SEM, TEM, XRD and BET analysis. The results indicated that TiO2 prepared by hydrothermal method were anatase crystal, and in the form of polycrystalline. The formation mechanism of SiO2/TiO2 nano-hybrid particles was also discussed.

Synthesis and structural characterization of the new rare-earth borosilicates Pr3BSi2O10 and Tb3BSi2O10

2015 ◽  
Vol 70 (12) ◽  
pp. 929-934 ◽  
Author(s):  
Sebastian Bräuchle ◽  
Hubert Huppertz
Keyword(s):  
Rare Earth ◽  
Silicon Dioxide ◽  
Lattice Parameters ◽  
Powder Diffraction Data ◽  
Praseodymium Oxide ◽  
Orthorhombic Space Group ◽  
Terbium Oxide ◽  
Boron Trioxide ◽  
Structure Determinations

AbstractThe rare-earth borosilicates RE3BSi2O10 (RE = Pr, Tb) were synthesized under high-temperature conditions of 1600 °C in a radio frequency furnace from praseodymium oxide, terbium oxide, silicon dioxide, silicon nitride, boron trioxide, and boric acid. The structure determinations based on powder diffraction data revealed that both phases RE3BSi2O10 (RE = Pr, Tb) are isotypic to Gd3BSi2O10 [L. Chi, H. Chen, X. Lin, H. Zhuang, J. Huang, Jiegou Huaxue1998, 17, 297]. The compounds crystallize in the orthorhombic space group Pbca (no. 61) with eight formula units and the lattice parameters a = 982.9(2), b = 714.2(2), c = 2314.4(4) pm, V = 1.6247(4) nm3, Rp = 0.0231, and Rwp = 0.0354 (all data) for Pr3BSi2O10 and a = 960.5(5), b = 692.1(3), c = 2272.4(1) pm, V = 1.5106(2) nm3 for Tb3BSi2O10. The lattice parameters of Tb3BSi2O10 could be determined, but a final refinement of the powder data has not proved satisfactory. The structure of Pr3BSi2O10 exhibits eight- (Pr1) and ninefold coordinated rare-earth cations (Pr2 and 3). Layers of ortho-silicate anions [SiO4]4– and borosilicate anions [BSiO6]5– are arranged alternatingly along the c axis and the RE cations are located in between.

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