Effects of Ca addition on the microstructure and viscosity as well as electrochemical properties of casting AZ63 magnesium alloy were studied. Testing results s
The FTIR spectroscopy indicates that the adsorption of quaternary ammonium salt DTAL on the diaspore and kaolinite is physical adsorption. The adsorption of cat
Gejiu Tin District is an old mine with a long exploitation history, but its resource is nearly used up at present. The research in mineral resources assessment based on GIS plays a more important and