1 - 10 of 18 articles
Low-pressure (1.33 and 13.3 Pa) chemical vapor deposition (CVD) of GeC
from tetraethylger-manium + hydrogen mixtures has been analyzed in a wide range of deposition temperatures, 300–1300 K, using thermodynamic modeling. In low-pressure CVD processes, films can be contaminated with impurities,...
Data are presented on temperature-gradient melt growth of GaInPAsBi solid solutions on GaP substrates. Heterophase equilibria in the Ga-In-P-As-Bi system are analyzed in terms of the regular solution model. The growth kinetics, composition, and structural perfection of GaInPAsBi/GaP...
This paper examines the effect of Bi doping on the optical properties of amorphous (GeS)1 − x
(0 ≤ x ≤ 0.15) films. Experimental data in conjunction with first-principles electronic structure calculations for Ge
clusters are used to derive a cluster model for the...
We have studied the thermoelectric properties of microcrystalline samples of the Pb0.2Sn0.8Te solid solution prepared by hot-pressing fine powders obtained through the thermal decomposition of lead acetate trihydrate and tin oxalate in the presence of tellurium powder. The electrical...
Diamond single crystals synthesized under various conditions have been characterized by absorption spectroscopy and electron paramagnetic resonance. The results demonstrate that preannealing of the reaction cell materials in an argon-hydrogen mixture and the use of a metal-carbon system...
We examine the potentialities of heterosegregation processes in the synthesis of surface phases, as exemplified by the preparation of oriented GaN on single-crystal GaAs. A new phase has been obtained for the first time by reacting liquid gallium resulting from surface autosegregation on gallium...
We have studied the properties of a Pb-Ca-Sn alloy for the positive current collector of lead-acid storage batteries, prepared by an existing industrial process and an experimental technique that involves melt jet quenching from the liquid state (QLS). The QLS process ensures good stability of...
We have studied the effect of the preparation and agglomeration conditions of tantalum powders produced by sodium reduction on the frequency dependences of the specific capacity and dielectric loss tangent for anodes fabricated from the powders.
Repeatedly filling the octahedral and tetrahedral pores in the quasicrystalline structure of three-dimensional opal matrices with europium-doped silica sols, we obtained two types of nanocomposites, depending on heat treatment conditions: opal photonic crystals filled with mesoporous glass and...
The chemical structure, phase composition, and crystal structure of La
Hf1 − x
films grown on Si using volatile metalorganic compounds as Hf and La precursors have been studied by X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive X-ray microanalysis, and atomic force...
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