| 简介 |
FIELD : chemistry.
SUBSTANCE : method of producing perovskites involves mechanical mixture of initial precursor salts in stoichiometric ratio, microwave treatment of the mixture of initial salts in a microwave oven, followed by thermal treatment at temperature 500-900°C for 1-5 hours. The initial salts used for synthesis are crystalline hydrates of nitrates of rare-earth, alkali-earth and transition metals, as well as unhydrated nitrates or carbonates of the same precursors. Microwave radiation is used at operating frequency of 2.45 GHz and power of 600-1000 W for 3-10 minutes.
EFFECT : method is fast, low-waste, energy- and labour-saving and enables to obtain pure single-phase perovskites with the required characteristics, for example with a developed specific surface area or are well crystallised or thermally stable for specific regions of use.
5 cl, 4 ex, 6 tbl, 6 dwg |
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