排序方式: 共有81条查询结果,搜索用时 343 毫秒
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V. K. Duplyakin O. N. Baklanova O. A. Chirkova N. V. Antonicheva A. B. Arbuzov N. N. Voitenko V. A. Drozdov V. A. Likholobov 《Kinetics and Catalysis》2010,51(1):126-130
The interaction of nickel hydroxocarbonate, ammonium paramolybdate, and ammonium metatungstate (Ni: Mo: W = 3: 1: 1) is reported.
Under mechanical activation conditions, nickel hydroxocarbonate particles undergo comminution and ammonium paramolybdate and
ammonium metatungstate particles soften and aggregate. It is demonstrated by DTA, X-ray diffraction, and IR spectroscopy that
heat treatment of the mechanically activated mixture at 400–450°C yields the salts NiMoO4 and NiWO4. 相似文献
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O. A. Knyazheva O. N. Baklanova A. V. Lavrenov V. A. Drozdov N. N. Leont’eva M. V. Trenikhin A. B. Arbuzov V. A. Likholobov 《Kinetics and Catalysis》2011,52(6):886-895
Mechanochemical activation in high-energy planetary activators was used for the preparation of highly dispersed nickel-molybdenum
compounds. Nickel hydroxocarbonate [NiCO3 · 2Ni(OH)2 · nH2O] and ammonium paramolybdate [(NH4)6Mo7O24 · 4H2O] were chosen as starting compounds. The effect of the Ni: Mo atomic ratio on the composition and structure of products formed
in the process of mechanochemical activation followed by calcination was studied. It was found that, at the Ni: Mo atomic
ratios of 1.0 and 1.4, the mechanically activated product after calcination at 520°C contained 70–100% β-NiMoO4, which is a stable phase at temperatures lower than 180°C. 相似文献
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A. P. Tyutyunnik V. N. Krasil’nikov I. F. Berger V. G. Zubkov L. A. Perelyaeva I. V. Baklanova 《Russian Journal of Inorganic Chemistry》2011,56(8):1168-1177
The vanadium(V) complexes K[VO2(SeO4)(H2O)] and K[VO2(SeO4)(H2O)2] · H2O were synthesized using original procedures; their physicochemical properties were studied, and the crystal structure was
determined on the basis of X-ray diffraction and neutron diffraction data. The structure of K[VO2(SeO4)(H2O)2] · H2O is composed of VO6 octahedra connected to form infinite chains by bridging SeO4 tetrahedra. Each VO6 tetrahedron has short terminal V-O bonds forming the bent dioxovanadium group VO2+ The unit cell parameters of K[VO2(SeO4)(H2O)2] · H2O are a = 6.4045(1) ?, b = 9.9721(2) ?, c = 6.6104(1) ?, β = 107.183(1)°, V = 403.34 ?3, Z = 2, monoclinic system, space group P21. The complex K[VO2(SeO4)(H2O)] forms a two-dimensional layered structure composed of highly distorted VO6 octahedra having two short terminal V-O bonds and SeO4 groups coordinated simultaneously by three vanadium atoms. This compound crystallizes in the monoclinic system (space group
P21/c): a = 7.3783(1) ?, b = 10.5550(2) ?, c = 10.3460(2) ?, β = 131.625(1)°, V = 602.894(5) ?3, Z= 4. The vibrational spectra of the studied compounds are fully consistent with their structural features. 相似文献
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V. P. Zhukov V. N. Krasil’nikov L. A. Perelyaeva I. V. Baklanova I. R. Shein 《Physics of the Solid State》2013,55(12):2450-2458
The absorption spectra of the precursor-derived solid solutions Zn1 ? x M x O (M = Fe, Co, Cu) with a tubular morphology of aggregates have been investigated in the ultraviolet and visible regions. The maximum metal concentration x in the Zn1 ? x M x O solid solutions is 0.075 for iron, 0.2 for cobalt, and 0.1 for copper. It has been found that the optical absorption and the band gap of the Zn1 ? x M x O compounds depend on the type of dopant. The obtained experimental data have been interpreted using the results of the performed ab initio calculations of the electronic band structure and optical absorption. 相似文献
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I. V. Baklanova I. A. Leonidov L. A. Perelyaeva 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(10):1343-1346
The synthesis conditions for single-phase solid solutions based on lanthanum gallate, LaGa1 ? x Mg x O3 ? δ(x= 0–0.25, solid-phase method) and La1 ? ySryGa1 ? yMgyO3 ? δ(y= 0–0.2, glycine nitrate method), have been investigated. The structural parameters have been calculated using X-ray powder diffraction data. The IR and Raman spectra have been analyzed. Regularities in the changes in the structural parameters and vibrational spectra with composition are established. 相似文献