Dielectric properties of ceramics within the BaO-Ln2O3-TiO2system
- 1 March 1992
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 127 (1) , 35-40
- https://doi.org/10.1080/00150199208223343
Abstract
The crystal structure of some inorganic compounds with general formula Ba6-xLn8+2x/3Ti18O54 - orthorhombic symmetry, sp. gr. Pba2, - satisfies the structural criteria for ferroelectricity. Ceramic materials corresponding to some particular compositions of this family have been prepared by solid state reaction and natural sintering at high temperature. Their low frequency dielectric characteristics have been studied between 300 and 800 K. For each composition, the dielectric constant shows a strongly pronounced maximum in the range 760–920 K depending on both the composition and the frequency. This dielectric behaviour should be related to a ferroelectric-paraelectric phase transition with a diffuse character.Keywords
This publication has 7 references indexed in Scilit:
- Structurally based predictions of ferroelectricity in seven inorganic materials with space group Pba2 and two experimental confirmationsActa crystallographica Section B, Structural science, crystal engineering and materials, 1989
- Microwave dielectric properties of BaNd2(1−xSm2xTi5O14 ceramicsMaterials Letters, 1989
- Microwave characteristics of BaO-Bi2O3-TiO2-Nd2O3 dielectric resonatorsJournal of Materials Science Letters, 1987
- Microwave Characteristics of (Zr, Sn)TiO4 and BaO‐PbO‐Nd2O3‐TiO2 Dielectric ResonatorsJournal of the American Ceramic Society, 1984
- Synthesis and crystal chemistry of BaNd2Ti3O10, BaNd2Ti5O14, and Nd4Ti9O24Journal of Solid State Chemistry, 1981
- Effective ionic radii in oxides and fluoridesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1969
- Atomic Displacement Relationship to Curie Temperature and Spontaneous Polarization in Displacive FerroelectricsPhysical Review B, 1968