Abstract Solid solutions of oxysulfides (RE0.95Ln0.05)2O2S (RE = La, Y; Ln Ho, Tm) were obtained by hydrogen reduction the co-precipitated sulfates followed sulfidation reaction products. The crystal chemical characteristics compounds refined Rietveld method. Morphological certification particles in dynamics synthesis was performed. Most produced reactions have a cut that indicates formation co...

Spinel MgAl2O4  nanopowders were synthesized by one-step solid state reactions using Al(NO3)3.9H2O and MgSO4 raw materials at stoichiometric 1 : 2, Mg : Al molar ratio at a constant reaction temperature of 1000 ºC for 8 h (S1), 10 h (S2) and  24 h (S3). The synthesized materials were characterized...

The solid state reaction of CUWO4-2 formation from CuO and WO3 was studied by the contact method in air and nitrogen. The results showed that the reaction is governed by the diffusion of the W 6 + and 0 2 _ ions and that the rate determining step is the diffusion of oxygen ions in the reaction product. This is in agreement with the defect structure of copper tungstate, an n-type semiconductor w...

A thermoanalytical (TGA/DSC) and diffractometric (XRD) study has been performed on the solid state reaction system L i 2 C 0 3 F e 2 0 3 in the xLi range 0.10-^0.50. A detailed analysis of the results shows that the data are in agreement with a reaction model where the carbonate decomposition is regulated by the formation of both L i F e 0 2 and L i F e 5 0 8 , and the relative amount of the tw...

Kinetic data for the solid-state reaction of sulfadiazine and acetylsalicylic acid are presented. A compaction method was used to observe the influence of applied pressure, particle size, and temperature on the reaction rate.