What could be the possible new applications if the temperature at the focus of a solar furnace were increased from 3500 degree ( the maximum possible value by the PROMES-CNRS solar facility) to ,for example, 4300 degrees ?
Is it possible to achieve direct reduction of Mg, Si and Ti etc. from their respective MgO, SiO2 and TiO2 etc ? without thermal carbon process, at temperature well above 4000K ?