A Study of the Possibility of Obtaining Deposited Coatings based on Intermetallic Titanium and Aluminum Compounds using the Chemical Vapor Transport Method

Theoretical and experimental investigations of processes of titanium-aluminum coating formation on refractory wire substrates by the Chemical Vapor Transport Reactions (CVT) method were carried out. Modelling of CVT was based on the thermodynamic analysis of an equilibrium iodide system implying the presence of one of titanium aluminides in the condensed phase, titanium and aluminum iodides in the gas phase, as well as atomic and molecular iodine. The fact that the volatility and stability of various metals are strongly interrelated was considered as a working hypothesis, which made it possible to obtain a number of alloys with the simultaneous decomposition of metal iodides constituting an alloy. Experiments on the deposition of titanium-aluminum coatings were conducted in a quasi-closed reactor, which allowed us to obtain deposited coatings on long-length refractory substrates

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Multiple Donors in Zinc Oxide Substrates

MRS Proceedings ◽

10.1557/proc-719-f2.4 ◽

2002 ◽

Vol 719 ◽

Cited By ~ 2

Author(s):

K. Thonke ◽

N. Kerwien ◽

A. Wysmolek ◽

M. Potemski ◽

A. Waag ◽

...

Keyword(s):

Zinc Oxide ◽

Chemical Vapor ◽

Binding Energies ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Oxide Substrates ◽

Multiple Donors ◽

Major Donors ◽

Available Zinc ◽

Transport Technique

AbstractWe investigate by photoluminescence (PL) nominally undoped, commercially available Zinc Oxide substrates (from Eagle Picher) grown by seeded chemical vapor transport technique in order to identify residual donors and acceptors. In low temperature PL spectra the dominant emission comes from the decay of bound exciton lines at around 3.36 eV. Zeeman measurements allow the identification of the two strongest lines and some weaker lines in-between as donorrelated. From the associated two-electron satellite lines binding energies of the major donors of 48 meV and 55 meV, respectively, can be deduced.

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Growth of CuGaS2Single Crystals by Chemical Vapor Transport and Characterization

Crystal Growth & Design ◽

10.1021/cg060450o ◽

2007 ◽

Vol 7 (4) ◽

pp. 618-623 ◽

Cited By ~ 33

Author(s):

P. Prabukanthan ◽

R. Dhanasekaran

Keyword(s):

Chemical Vapor ◽

Vapor Transport ◽

Chemical Vapor Transport

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Evolution of reduction process from tungsten oxide to ultrafine tungsten powder via hydrogen

High Temperature Materials and Processes ◽

10.1515/htmp-2021-0017 ◽

2021 ◽

Vol 40 (1) ◽

pp. 171-177

Author(s):

Yue Wang ◽

Ben Fu Long ◽

Chun Yu Liu ◽

Gao An Lin

Keyword(s):

Surface Morphology ◽

Tungsten Oxide ◽

Tungsten Powder ◽

Reduction Process ◽

Chemical Vapor ◽

Transition Process ◽

Vapor Transport ◽

Fibrous Structure ◽

Chemical Vapor Transport ◽

Oxide Particles

Abstract Herein, the evolution of reduction process of ultrafine tungsten powder in industrial conditions was investigated. The transition process of morphology and composition was examined via SEM, XRD, and calcination experiments. The results show that the reduction sequence of WO2.9 was WO2.9 → WO2.72 → WO2 → W on the surface, but WO2.9 → WO2 → W inside the oxide particles. With the aid of chemical vapor transport of WO x (OH) y , surface morphology transformed into rod-like, star-shaped cracking, floret, irregularly fibrous structure, and finally, spherical tungsten particles.

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In situ formation of highly exposed NiPS3 nanosheets on nickel foam as an efficient 3D electrocatalyst for overall water splitting

Sustainable Energy & Fuels ◽

10.1039/d1se00110h ◽

2021 ◽

Author(s):

Liang Fang ◽

Yanping Xie ◽

Peiyin Guo ◽

Jingpei Zhu ◽

Shuhui Xiao ◽

...

Keyword(s):

Water Splitting ◽

Nickel Foam ◽

Chemical Vapor ◽

Bifunctional Catalyst ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Overall Water Splitting ◽

One Step ◽

Transport Method

Vertical NiPS3 nanosheets in situ grown on conducting nickel foam were fabricated by a facile one-step chemical vapor transport method and used as an efficient bifunctional catalyst for overall water splitting.

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