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Your search keyword '"Aluminum oxynitride"' showing total 4 results
Start Over Descriptor "Aluminum oxynitride" Journal inorganic materials
4 results on '"Aluminum oxynitride"'

1. Synthesis and Luminescence Properties of Tb3+-Doped Aluminum Oxynitride.

Author

Akhmadullina, N. S., Ishchenko, A. V., Yagodin, V. V., Lysenkov, A. S., Sirotinkin, V. P., Kargin, Yu. F., and Shul'gin, B. V.

Subjects
*TERBIUM, *LUMINESCENCE, *ALUMINUM, *LUMINESCENCE quenching, *ATMOSPHERIC nitrogen, *CATHODOLUMINESCENCE, *PHOTOLUMINESCENCE
Abstract

We report an experimental study concerned with the synthesis and luminescence properties of Al5O6N aluminum oxynitride doped with Tb3+ in the concentration range 0.025–0.5 at %. All of the samples, prepared by firing appropriate mixtures in a nitrogen atmosphere at 1600°C, consisted predominantly of phase-pure γ-ALON (Al5O6N), with small amounts of impurity phases: Al7O3N5 aluminum oxynitride and Tb3Al5O12 terbium aluminate. Their pulsed cathodoluminescence and photoluminescence spectra contain emission bands typical of Tb3+ ions. The concentration threshold for luminescence quenching corresponds to a Tb3+ concentration at a level of 0.4 at %. A Tb3+ cross relaxation effect found in Al5O6N:Tb3+ is discussed and photoluminescence spectra are shown to be inhomogeneous at low Tb3+ concentrations in Al5O6N. [ABSTRACT FROM AUTHOR]

Published
2019
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2. Heating-induced transformation of pseudoboehmite and a mixture of pseudoboehmite, aluminum nitride, and aluminum oxide

Author

A. V. Steblevskii, E. N. Beresnev, V. A. Ketsko, N. P. Simonenko, A. S. Alikhanian, Lyudmila V. Goeva, M. N. Smirnova, M. A. Kop’eva, and G. E. Nikiforova

Subjects
Materials science, General Chemical Engineering, Pseudoboehmite, Inorganic chemistry, Metals and Alloys, chemistry.chemical_element, Chemical interaction, Nitride, medicine.disease, Inorganic Chemistry, chemistry.chemical_compound, chemistry, Aluminium, Materials Chemistry, medicine, Dehydration, Aluminum oxide, Aluminum oxynitride
Abstract

We have studied the heating-induced transformation of a mixture of pseudoboehmite and aluminum oxynitride and have shown that there is negligible chemical interaction between them up to 800–850℃ and that the weight loss of the mixture is only caused by the dehydration of the pseudoboehmite.

Published
2015

3. Thermodynamic properties of aluminum oxynitride from 0 to 340 K

Author

K. S. Gavrichev, V. N. Guskov, A. V. Tyurin, and N. A. Gribchenkova

Subjects
Materials science, General Chemical Engineering, Enthalpy, Metals and Alloys, Analytical chemistry, Calorimetry, Heat capacity, Gibbs free energy, Inorganic Chemistry, Theoretical physics, symbols.namesake, Materials Chemistry, symbols, Adiabatic process, Aluminum oxynitride
Abstract

The temperature-dependent heat capacity of aluminum oxynitride has been determined by adiabatic calorimetry in the range 0–340 K. Smoothed heat capacity data have been used to calculate its thermodynamic functions: entropy, enthalpy increment, and reduced Gibbs energy. The results are Cp0(298.15 K) = 891.0 ± 1.8 J/(mol K), S0(298.15 K) = 614.4 ± 1.2 J/(mol K), H0(298.15 K) − H0(0) = 117.3 ± 0.2 kJ/mol, and Φ0(298.15 K) = 221.0 ± 1.8 J/(mol K).

Published
2015

4. Decomposition of aluminum oxynitride compounds in an air-vapor medium at 950°C

Author

S. V. Steblevskii, M. N. Smirnova, A. V. Shcherbakov, M. A. Kop’eva, N. A. Gribchenkova, A. S. Alikhanian, E. N. Beresnev, and V. A. Ketsko

Subjects
Inorganic Chemistry, Hydrolysis, Materials science, Chemical engineering, General Chemical Engineering, Phase (matter), Inorganic chemistry, Materials Chemistry, Metals and Alloys, Protonation constant, Decomposition, Aluminum oxynitride
Abstract

Aluminum oxynitride hydrolysis in wet air at a temperature of 950°C has been shown to lead to the formation of a phase whose composition lies beyond the Al2O3-AlN join in the Al-O-N system.

Published
2014

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