Usage of the synchrotron radiation diffraction for ``in situ'' kinetics study of the nickel tungstenate solid state synthesis
Abstract
Investigation of solid state reaction between NiO and WO 3 was carried out at the station "Time-resolved diffraction" of the storage ring VEPP-3 SSRC BINP SB RAS. The method of time-resolved diffraction and a fast one-coordinate detector OD-3 were used for data acquisition. Exposition time of one frame was 15-20 s and experiments were continued until one of the phases disappeared or intensity of the NiWO 4 peak became stable. Temperatures in the furnace were controlled by a thermocouple and were 580°C, 625°C, 675°C and 725°C. Composition of the initial powder ranged from 0.1 NiO+0.9 WO 3 to 0.9 NiO+0.1 WO 3 through 0.2 at each temperature point. Kinetics of the NiWO 4 peak growth was obtained at different temperatures and energy of activation was calculated.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- September 2001
- DOI:
- 10.1016/S0168-9002(01)01049-X
- Bibcode:
- 2001NIMPA.470..228S