Darstellung von Calcium- und Strontiumwolframat durch tribochemische Reaktion |
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| Authors: | Rainer Albrecht Harald Husler Rolf Mbius |
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| Institution: | Rainer Albrecht,Harald Häusler,Rolf Möbius |
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| Abstract: | Stoichiometric powder mixtures CaO/WO3 and SrO/WO3 react tribochemically on grinding in a vibrating mill to CaWO4 and SrWO4, respectively. IR spectra, X-raydiffraction, DTA and solubilities indicate at least 70–80% CaWO4 are formed after periods of drinding of 50 hours, and 100% SrWO4 after periods of 15 hours. Observations on the behaviour of the ground samples on subsequent annealing contribute to the general solid-state reaction MO + WO3 → MWO4. |
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