Thin films of potassium tantalum niobate (KTN) formed by metalorganic deposition were subjected to one‐ and two‐step sinterings in air and potassium atmosphere. These polycrystalline films were found to be mechanically robust and display electrical properties similar to single‐crystal KTN. This report shows that film grain size increased with sintering temperature and time. Scanning electron micrographs revealed grain sizes ranging from submicrometer to 5 μm in diameter. The maximum relative permittivity, its corresponding rate of change with temperature, and film grain size were measured as a function of sintering temperature and time.
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Catalan et al. (1992) studied this question.
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