Effect of annealing in different medium on the properties of calcium fluoride nanopowder

Using a pulsed electron beam evaporation in vacuum a mesoporous nanopowder CaF$_2$ with a specific surface area up to 60.5 m$^2$/g were produced. The effect of annealing in different media on the evolution of magnetic and texture properties of CaF$_2$ nanoparticles has been studied. For the first time, the effect of annealing medium on the specific surface area and magnetization of CaF$_2$ nanopowders was discovered.