Composition Control of Low-Volatility Solids Through Chemical Vapor Transport Reactions. I. Theory of Selective Chemical Vapor Transport

Zavrazhnov, A. Yu.; Зарцын, И. Д.; Наумов, А. В.; Зломанов, В. П.; Davydov, Albert V.

doi:10.1007/s11669-007-9200-0

Cited by 5 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact suggests that the equilibria considered here are close to selective chemical vapor transport (SCVT). We described SCVT reactions in works [27][28][29] . A distinctive feature of the transport transformations considered in this paper is that these transformations occur with the participation of the liquid phase (molten salts).…”

Section: Discussionmentioning

confidence: 99%

The Iron Sulfides Crystal Growth from the Halide Melts

et al. 2018

View full text Add to dashboard Cite

A new approach to a single crystals growth of the iron sulfide phases of definite structure and nonstoichiometry is developed and applied. This approach is based on the method of crystal growing from solution melts. This approach is based on the crystallization or recrystallization of iron sulfides from iron sulfide solutions in iron dihalide melts under fixed sulfur vapor pressure in the closed system in non-isothermal (two-temperature) conditions. It allows to regulate the composition and structure of the resulting iron sulphide. In particular, at a relatively low pressure (< 0.4 atm), pyrrhotite with a trigonal 3T structure is synthesized. At higher pressure pyrite β-FeS 2 is grown. Reaction scheme for the formation of iron sulphides based on the reversible oxidation of sulfur by iron dihalide is proposed and substantiated. On the base of the {pyrite + marcasite} -mixture annealing under the melts of the deepest eutectic compositions of KCl -FeCl 2 and NaCl -KCl -FeCl 2 systems, the instability of the marcasite phase regarding the pyrite one (at least, for T ≥ 340°C) was shown.

show abstract

Section: Discussionmentioning

confidence: 99%

The Iron Sulfides Crystal Growth from the Halide Melts

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A chemical vapor-transport (CVT) method is commonly used for obtaining high-quality single crystals that are difficult or even impossible to be prepared by other methods22232425. The CVT method was successfully applied for synthesizing various inorganic compounds and separating some rare metals and rare earths26272829.…”

mentioning

confidence: 99%

Formation mechanisms of Fe3−xSnxO4 by a chemical vapor transport (CVT) process

Zhang

Liu

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Our former study reported that Fe-Sn spinel (Fe3−xSnxO4) was easily formed when SnO2 and Fe3O4 were roasted under CO-CO2 atmosphere at 900–1100 °C. However, the formation procedure is still unclear and there is a lack of theoretical research on the formation mechanism of the Fe-Sn spinel. In this work, the reaction mechanisms between SnO2 and Fe3O4 under CO-CO2 atmosphere were determined using XRD, VSM, SEM-EDS, XPS, etc. The results indicated that the formation of Fe3−xSnxO4 could be divided into four steps: reduction of SnO2 to solid phase SnO, volatilization of gaseous SnO, adsorption of gaseous SnO on the surface of Fe3O4, and redox reaction between SnO and Fe3O4. During the roasting process, part of Fe3+ in Fe3O4 was reduced to Fe2+ by gaseous SnO, and meanwhile Sn2+ was oxidized to Sn4+ and entered into Fe3−xSnxO4. The reaction between SnO2 and Fe3O4 could be summarized as Fe3O4 + xSnO(g) → Fe3−xSnxO4 (x = 0–1.0).

show abstract

Composition Control of Low-Volatility Solids Through Chemical Vapor Transport Reactions. I. Theory of Selective Chemical Vapor Transport

Cited by 5 publications

References 16 publications

The Iron Sulfides Crystal Growth from the Halide Melts

The Iron Sulfides Crystal Growth from the Halide Melts

Formation mechanisms of Fe3−xSnxO4 by a chemical vapor transport (CVT) process

Structural, light emitting, and photoelectrical properties of multilayered 2D mixed alloys of gallium monochalcogenides

Contact Info

Product

Resources

About