Dielectric and thermoelectric studies on TiO2 based materials
TL;DR: In this article, the changes in thermoelectric power as a function of temperature and that of the dispersion of dielectrics have been attributed to the interaction of Fe3+ with TiO2 in the matrix.
Abstract: Thermoelectric power (S) and permittivity measurements were studied for TiO2 and Fe3+ loaded TiO2. The changes in thermoelectric power as a function of temperature and that of the dispersion of dielectrics has been attributed to the interaction of Fe3+ with TiO2 in the matrix. When such an Interaction is not present there is no appreciable change in the thermoelectric power and dielectric dispersion.
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01 Jan 1983TL;DR: In this paper, a broad-brush view of dielectric relaxation in solids is presented, making use of the existence of a universality of Dielectric response regardless of a wide diversity of materials and structures with dipolar as well as charge-carrier polarization.
Abstract: This review presents a wide-ranging broad-brush picture of dielectric relaxation in solids, making use of the existence of a `universality' of dielectric response regardless of a wide diversity of materials and structures, with dipolar as well as charge-carrier polarization. The review of the experimental evidence includes extreme examples of highly conducting materials showing strongly dispersive behaviour, low-loss materials with a `flat', frequency-independent susceptibility, dipolar loss peaks etc. The surprising conclusion is that despite the evident complexity of the relaxation processes certain very simple relations prevail and this leads to a better insight into the nature of these processes.
4,752 citations
2,538 citations
TL;DR: In this article, the CO H 2 reaction over Fe TiO 2 has been studied by Mossbauer spectroscopy and kinetic measurements after the catalyst was reduced at 558, 723, and 773 K. The experimental results are discussed in terms of a localized charge transfer from the metal to the support during the course of high temperature reduction.
32 citations
TL;DR: In this paper, three different methods of preparation including impregnation and precipitation were used to prep Silica-supported nickel catalysts, and the properties of these catalysts were studied by electron microscopy, X-ray diffraction, thermal analysis, and infrared spectroscopy.
32 citations