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Your search keyword '"Magnesium titanate"' showing total 5 results
Start Over Descriptor "Magnesium titanate" Publication Year Range More than 50 years ago
5 results on '"Magnesium titanate"'

1. Solubilities of Magnesia, Titania, and Magnesium Titanate in Aluminum Oxide

Author

Salil K. Roy and Robert L. Coble

Subjects
Materials science, Hydrogen, Magnesium, Inorganic chemistry, chemistry.chemical_element, Fraction (chemistry), Hydrogen atmosphere, Lattice constant, chemistry, Magnesium titanate, Materials Chemistry, Ceramics and Composites, Solubility, Aluminum oxide
Abstract

On heat treatment in air the solubility of MgO or TiO2, in Al23 is too small to detect by lattice parameter shifts. The solubility of MgTiO3 in Al2O3 in air increased to the measured values, expressed as atomic fractions Mg:A1or Ti:A1of0.82 × lo-2, 1.43 × 10-2, and 1.75 × 10-2 at 1250°, 1650°, and 1850°C, respectively. In 1 atm hydrogen the TiO2 solubility expressed as the atomic fraction Ti:A1 is 0.55 × lo-2, 0.75 × 10W2, 1.15 × 10-2, and 1.50 × 10p2 at 1400°, 1500°, 1600°, and 1700°C, respectively. The increased solubility in H2 was attributed to reduction of the titanium ion. The solubility of MgO in A12O3 in vacuum (0.3μ)expressed as the atomic fraction Mg:A1 was measured as 1.10 × loW4, 3.00 × 10”4, 6.80 × 10–4, and 1.40 × 10-3 at 1530°, 1630°, 1730°, and 183O°C, respectively. These contents did not cause an observable change in lattice parameter, but a slight change was observed when MgO was dissolved in A12O3 in a hydrogen atmosphere.

Published
1968
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2. Microwave High Dielectric Constant Materials.

Author

RAYTHEON CO WALTHAM MA RESEARCH DIV, Readey, D. W., Maguire, E. A., Hartwig, C. P., Masse, D. J., RAYTHEON CO WALTHAM MA RESEARCH DIV, Readey, D. W., Maguire, E. A., Hartwig, C. P., and Masse, D. J.

Abstract

The major effort during this reporting period has been to develop temperature-compensated, two-phase dielectrics in the Zn2TiO4-TiO2 and the MgTi2O5-TiO2 systems. Two materials, designated ZT-75 and MT-16 were developed which are very nearly compensated with dielectric constants near k = 24. The mechanical, thermal, and physical properties of these materials were measured. The significance and applicability of the various dielectric constant temperature coefficients are briefly discussed. Finally, a complete list of property values is given for the four materials developed in this phase of the program: (1) BaTi4O9, (2) Li2O-1.5TiO2, (3) MT-16, and (4) ZT-75. (Author)

Published
1970

5. Properties of barium-magnesium titanate dielectrics

Author

Gborge R. Shelton, A.S. Creamer, and Elmer N. Bunting

Subjects
Materials science, chemistry, Magnesium titanate, Materials Chemistry, Ceramics and Composites, Analytical chemistry, Mineralogy, chemistry.chemical_element, Barium, Dielectric, Absorption (chemistry), Brief periods, Thermal expansion
Abstract

Dielectrics having compositions in the system BaTiO3--4MgO:TiO2-TiO2 were matured (

Published
1948
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