Tantalum Dioxide Complexes with Dinitrogen. Formation and Characterization of the Side-on and End-on Bonded TaO<sub>2</sub>(NN)<sub><i>x</i></sub> (<i>x</i> = 1−3) Complexes
TaO2(η1-NN)x (x = 1−3) complexes on annealing, in which the N2 ligands are end-on bonded to the tantalum metal center. The TaO2(η1-NN)3 complex decomposed to TaO2(η1-NN)2 under infrared irradiation. The TaO2(η1-NN)2 and TaO2(η1-NN)3 complexes rearranged to the less stable TaO2(η1-NN)(η2-N2) and TaO2((η1-NN)2(η2-N2) isomers under visible light excitation. Both the mono- and bis-dinitrogen complexes were predicted
An insight into the polarization mechanism of rutile based oxides with a wide doping levels in the TiO2-CuO-TaO2.5 ternary system
作者:Longfei Yuan、Liping Li、Guangshe Li、Dan Zhang、Wei Han、Dayong Lu
DOI:10.1016/j.jallcom.2018.11.195
日期:2019.4
Abstract Excellent dielectric properties have been found in some acceptor-donor co-doped rutile TiO2 type materials, but the polarization mechanism has long been debated. In present work, the polarization behaviors of single solid solutions Ti1-x(Cu0.333Ta0.667) xO2 (0
Matrix Isolation Infrared Spectroscopic and Theoretical Studies on the Reactions of Niobium and Tantalum Mono- and Dioxides with Methane
作者:Guanjun Wang、Sixue Lai、Mohua Chen、Mingfei Zhou
DOI:10.1021/jp053666u
日期:2005.10.1
The reactions of niobium and tantalum monoxides and dioxides with methane have been investigated using matrix isolation infrared spectroscopic and theoretical calculations. The niobium and tantalum oxide molecules were prepared by laser evaporation of Nb(2)O(5) and Ta(2)O(5) bulk targets. The niobium monoxide molecule interacted with methane to form the ONb(CH(4)) complex, which was predicted to have
Shock-recovery experiments on Nb2O5 powder specimens are made in pressure ranges up to 50 GPa using the gun method. “NbO2” with the rutile structure is formed above about 40 GPa when an open recovery fixture is used. The tetragonal unit cell dimensions are measured to be a = 4.784(2) Å, c = 3.029(2) Å, and V = 69.34(6) Å3. The metal-to-oxygen ratio is determined to be Nb0.94O2 by means of thermogravimetry
使用枪法在Nb 2 O 5粉末样品的压力范围高达50 GPa的情况下进行了冲击恢复实验。当使用开放式回收夹具时,具有金红石结构的“ NbO 2 ”在约40 GPa以上形成。四方单位晶胞尺寸被测量为一个= 4.784(2)埃,c ^ = 3.029(2)埃,V = 69.34(6)3。通过热重法测定金属与氧的比率为Nb 0.94 O 2。对Nb 2 O 5和Ta 2 O 5的减震性能进行了比较研究。