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- W2387004808 abstract "An Fe-Mg tourmaline single crystal from Yunnan Province,China,was prepared as slices perpendicular to its c axis.The oriented crystal slices of tourmaline were heated at 850 ℃ for 48 h and 72 h,respectively.The contents of Fe2+ and Fe3+ in the tourmaline slices and their pyroelectric coefficients were characterized before and after heat treatment.Results showed that Fe2+ in tourmaline was oxidized nearly completely when heated at 850 ℃ for 48 h,and its pyroelectric coefficient increased from 6.4 to 8.0 μC·m-2·K-1.When heated at 850 ℃ for 72 h,the contents of Fe2+ in the tourmaline were only slightly further reduced,however its pyroelectric coefficient increased from to 8.9 μC·m-2·K-1.It is believed that the oxidation of Fe2+ in the tourmaline is responsible for the increase of its pyroelectric coefficient in the early stage of heat treatment and the shift of Fe3+ from Y octahedron to Z octahedron is responsible for the increase of its pyroelectric coefficient in the later stage of heat treatment,which needs further investigations." @default.
- W2387004808 created "2016-06-24" @default.
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- W2387004808 date "2008-01-01" @default.
- W2387004808 modified "2023-10-02" @default.
- W2387004808 title "THE INFLUENCE OF HEAT TREATMENT ON THE PYROELECTRIC PROPERTIES OF FE-MG TOURMALINE" @default.
- W2387004808 hasPublicationYear "2008" @default.
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