Zobrazeno 1 - 10
of 308
pro vyhledávání: '"J. M. McHale"'
Publikováno v:
Chemistry of Materials. 11:1148-1152
High-temperature oxide melt drop solution calorimetry was used to study the energetics of nitride formation. The standard enthalpies of formation of several binary and ternary nitrides were determined. These values (in kJ mol{sup {minus}1}) are as fo
Publikováno v:
Chemistry of Materials. 10:1083-1090
The formation of MgAl2O4 from a freeze-dried nitrate precursor was studied by thermogravimetric analysis, differential thermal analysis, powder X-ray diffraction, transmission electron microscopy, 27Al magic angle spinning NMR, and high-temperature s
Publikováno v:
The Journal of Physical Chemistry B. 102:916-920
We report the laser spectroscopic characterization of bulk monoclinic Eu3+:Y2O3, which was prepared by a high-temperature, high-pressure synthesis method. The bulk monoclinic phase has sharp spectral lines without the line broadening and “secondary
Autor:
J. M. McHale, Sankaran Sundaresan, Daniel M. Dabbs, Alexandra Navrotsky, Ilhan A. Aksay, K. Yürekli
Publikováno v:
Chemistry of Materials. 9:3096-3100
The addition of small amounts (2-10 wt %) of SiO2 to A-Al2O3 increases the temperature of heat treatment necessary for transformation to R-Al2O3 by100 K. We have studied this system using high-temperature solution calorimetry in molten 2PbO‚B2O3 at
Publikováno v:
Science. 277:788-791
Corundum, α-Al 2 O 3 , is the thermodynamically stable phase of coarsely crystalline aluminum oxide, but syntheses of nanocrystalline Al 2 O 3 usually result in γ-Al 2 O 3 . Adsorption microcalorimetry, thermogravimetric analyses, and Brunauer-Emme
Publikováno v:
Chemistry of Materials. 9:1538-1546
High-temperature oxide melt drop solution calorimetry was used to study the energetics of ternary nitride formation. The standard enthalpies of formation of several binary and ternary nitrides were determined. These values in kJ mol-1 are ΔHf°(Li3N
Publikováno v:
The Journal of Physical Chemistry B. 101:603-613
Corundum, α-Al2O3, appears to be the thermodynamically stable phase of aluminum oxide at all common pressure and temperature conditions, but attempted syntheses of nanocrystalline Al2O3 usually res...
Publikováno v:
Chemistry - A European Journal. 2:1514-1517
The energetics of ternary oxide formation is reasonably well understood, but little is known of the energetics of ternary nitride formation. We have developed new procedures for high-temperature oxide melt solution calorimetry on metal nitrides and e
Publikováno v:
Journal of Materials Research. 11:1199-1209
An aqueous, all nitrate, solution-based preparation of BaTiO3 is reported here. Rapid freezing of a barium and titanyl nitrate solution, followed by low temperature sublimitation of the solvent, yielded a freeze-dried nitrate precursor which was ther
Publikováno v:
ChemInform. 28