ChemInform Abstract: Vapor-Phase Growth of Transparent Zinc Oxide Ceramics with c-Axis Orientation.
Abstract
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ChemInform Abstract
Highly oriented ZnO polycrystalline specimen of very high optical transmittance (80-90% at 800 nm) are prepared by chemical vapor transport (1150 °C → 930 °C) using a sintered rodlike ZnO ceramic as vapor source. Nitrogen gas containing 6% H2 is employed to maintain a reducing atmosphere in the reaction tube. Subsequent annealing in oxygen is essential for the improvement of the optical transmittance (the as-grown polycrystal has a transmittance of 40-50% at 800 nm).