Autor: Wang, Xiao-Ping - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Feasibility study on preparation of magnesium titanate in carbonthermic reduction of vanadium titanomagnetite concentrates
Autorzy:: Chen, Chao
Sun, Ti-Chang
Kou, Jue
Wang, Xiao-Ping
Zhao, Yong-Qiang
Powiązania:: https://bibliotekanauki.pl/articles/110181.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: vanadium titanomagnetite
carbonthermic reduction
magnesium titanate
formation mechanism
Opis:: Effect of temperature and Mg:Ti ratio on phase composition and microstructure of reduced pellets was investigated to verify the feasibility of preparation of magnesium titanate by adding MgO in carbonthermic reduction of the vanadium titanomagnetite concentrates (VTC). Thermodynamic analysis results showed that magnesium titanate is more easily generated than FeTi2O5 or TiO2 by the reaction of FeTiO3 and MgO under the reductive atmosphere, which was confirmed by the discovery of magnesium titanate at roast experiment. It was found that the optimum conditions for reduction of VTC pellets were temperature of 1250 ºC and Mg:Ti ratio of 2, and the main phases of reduction product were metallic Fe and magnesium titanate (Mg2TiO4). However, trace iron impurities in Mg2TiO4 particles were found by energy-dispersive spectroscopy (EDS), so further purification is required.
Źródło:: Physicochemical Problems of Mineral Processing; 2019, 55, 2; 417-425
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Phase Transition, Electronic and Magnetic Properties of CsN and RbN Alloys under Pressure
Autorzy:: Wei, Xiao-Ping
Zhang, Ya-Ling
Wang, Qing
Deng, Jian-Bo
Powiązania:: https://bibliotekanauki.pl/articles/1401895.pdf
Data publikacji:: 2015-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.15.Mb
71.55.Ak
74.62.Fj
Opis:: Using full-potential local-orbital minimum-basis method within density functional theory, we study the phase transition, electronic and magnetic properties of CsN and RbN alloys under external pressure. Concerning the phase transition, we consider three possible crystal structures, including caesium chloride (CsCl), rock salt (RS) and zinc blende (ZB) ones. Calculations of enthalpy exhibit that a pressure-induced phase transition occurs between the three structures, and the phase transitions are difficult to be distinguished under ambient condition (P=0 GPa). As the further increase of pressure, they can be specified clearly. In addition, the electronic calculations indicate that both alloys are half-metallic ferromagnets with a total magnetic moment of 2.000 $μ_{B}$, which is promising for fabricating spin injection devices. Finally, we discuss the electronic and magnetic properties of CsN and RbN under external pressure. A pressure-induced delocalized electronic states and magnetic phase transition are observed in RbN and CsN alloys.
Źródło:: Acta Physica Polonica A; 2015, 128, 3; 373-376
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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