Even though the (75 NaPO3-25 CaF2) (in mol%) glass can be heat-treated into transparent glass-ceramic with Er3+ doped CaF2 crystals precipitating in volume of during heat-treatment, this was found to a poor former, limiting its use as upconverter under 975 nm pumping. In study, impact composition on thermal, optical and structural properties investigated order understand how tailored for develo...

Nano-coated particles and whiskers were used as reinforcing additives for ceramic tool materials to take advantage of synergistic toughening enhancement mechanisms. An Al2O3/TiC/CaF2@SiO2/SiCw material was fabricated by hot-pressing. Self-lubricating toughened nano CaF2@SiO2 coated SiC studied. When the addition content 10 vol% 20 vol%, with best comprehensive properties obtained. The results s...

The present work reports on the synthesis of cellulose acetate (CA) asymmetric membranes with the incorporation of inorganic fluorides, CaF2 particles. These fillers of polymeric composites can, according to the literature, promote the ordering of the polymer matrix, which can lead to interesting permeation properties. In order to achieve that, fluorite (CaF2 ) fine particles were prepared by a...

Natural calcium fluoride (fluorite CaF2:N) exhibits multiple LMOSL peaks when stimulated using blue LED’s, which makes it an unique phosphor. Such a property is not observed experimentally in any other dosimetric phosphors namely Al2O3:C, BeO etc. This makes CaF2:N as an effective tool not only for testing the kinetic models of luminescence but also for investigating OSL using CW and LM stimula...

In order to clarify the mechanism for increase in oxygen content during electroslag remelting, this paper analyzes detail effect of slag components on gas and number, size composition inclusions ingots. The results show that, when CaF2-MgF2-CaO-MgO-SiO2 system is used ingots decreases clearly with basicity. When basicity 14~3.3, only 9~11 ppm. drops 2.3, increases 20 high also leads a decrease ...

The microstructure of a mechanically finished calcium fluoride (CaF2) was studied by transmission electron microscopy (TEM). The (111) oriented surfaces of high-purity CaF2 single crystals were finished to a flat surface by ultra-precision mechanical polishing. A float polishing method—with 7-nm-diameter silicon dioxide powder, pure water, and a tin lap—was employed for the finishing. Prior to ...

The theory of tunneling and resonant tunneling is reviewed. Experimental justification of this theory was provided by an InP-based RTD with room-temperature PVR = 12. Its valley current was well-modeled as the sum of thermionic emission through the second resonance and a temperature-independent scattering/defect component. ZnS and CaF2 were experimentally considered as epitaxial barrier materia...