I. D. Belova, T. Varlamova, B. Galyamov
Aug 1, 1988
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0
Influential Citations
35
Citations
Journal
Materials Chemistry and Physics
Abstract
Abstract The composition, structure and electronic properties of thermally prepared iridium oxide films are studied depending on the preparation conditions, and particularly, on the composition of iridium complexes in the starting solutions of Ir chlorides. The starting solutions and the thermal treatment products of both the films and iridium hydroxides produced from Ir(IV) and Ir(III) chloride solutions were characterized. The data of IR and XPE spectroscopy, electron microscopy and diffraction analysis have shown that the films are the products of incomplete dehydration of hydrated iridium dioxide (HID) and are mixtures of phases of anhydrous crystalline IrO2 and amorphous or crystalline HID, identical to hydroxides in composition. The different compositions of starting solutions affect the chemical composition and structure of HID, thus determining also the differences in the structure and composition of the films by the following parameters: the degree of crystallinity, the crystallites' size and orientation, the composition of the crystalline and amorphous phases, the surface area and electronic properties.