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A series of typical samples based on β-Zn4Sb3 have been prepared by spark plasma sintering. Single-phase β-Zn4Sb3 sample is found to be a brittle material. Many hole defects are found in single-phase sample after chemical etching. A small amount of excess metallic Zn reduces the hole defects and improves the thermoelectric performance of Zn-rich sample. The maximum ZT can reach 1.31 at 673K. The improvement...
A trimethylamine (TMA) vapor probe based on the sensitive membrane of chitosan, which encapsulated pimelic acid on piezoelectric quartz crystal has been prepared for the assay of fish freshness. The response of the probe to TMA is rapid and completely reversible at normal temperature and relatively high humidity. The probe has an exponential response to TMA in the concentration range of 5–200ppm,...
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