Synthesis and investigation of luminescence properties of doped lithium silicate glass ceramics

Glass-ceramic materials, nucleation and crystal growth stages of crystallization of suitable glasses are materials produced by controlled crystallization. These materials show different mechanical and physical properties depending on impurities while materials produce. They can be used in high-tech special materials as glass-ceramics and glass have both crystal and glass properties.Today, boron is used as a raw material in many areas, creating a glassy compound with different materials used to make ceramic materials. Boron, aluminium, silicon materials such as lithium, while doping different impurities, exhibits a variety of optical properties. This diode laser and the construction of a variety of features, fluorescent tubes, such as TV panels and auxiliary products, etc. can be used in many optical and electronic areas.Lithium silicate (Li2SiO3) glass ceramics, high temperature strength which provides high strength and light transmittance providing flexible materials, and optical properties that can show materials. Li2SiO3 doped with a variety of alkali-earth halides, especially white light and high intensity LEDs, green and blue lasers, are used in long-lasting lithium-ion batteries the new generation. Li2SiO3 glass ceramics used in some areas today (white LED, high intensity lasers, solid state lighting units, etc.) are host materials .However, silica-based host materials, are providing a good fit with rare earth elements which allow the construction of luminescent material.In this study, Li2SiO3 glass ceramics were synthesized using conventional solid state synthesis method. The product as the host of this material, Sm doped at various rates, optical properties were examined. Later in the same proportions Sm, Eu, Dy and Er rare earth doped territory, PL and TL properties were investigated. Such as sodium silicates (Na2SiO3),a certain pressure and temperature environment, Li2SiO3 has the orthorhombic structure and space group Cmc21 and the lattice constants (a, b, c) = (9.396, 5,396, 4,661) Å . The unit cell containing 24 atoms. Exchanging the doped material with lithium atom does not influence the symmetry or symmetry parameters anyway. Sm doped Li2SiO3 samples rates showed absorption peaks in many regions. All absorption peaks, the ground state of the 6H5 / 2 levels. In addition, FTIR measurements of these samples based on the information obtained from the Si-O bonds. SEM images of various conclusions have been reached based on particle size and structure. PL measurements, Dy doped Li2SiO3, sample have shown emission at 4F9 / 2 ? 6H13 / 2 (yellow colors). Er doped Li2SiO3, sample has shown between the characteristic intra-4f shell transitions 4I13 / 2 and 4I15 / 2 at 1530 nm and demonstrated around 1540 nm. Eu doped Li2SiO3 sample based on the level of excitation of the 5D0 to 7Fj (j = 0,1,2,3) levels exhibits the various electronic transitions. At last, Sm doped Li2SiO3 sample has shown intra -4f orbital 4G5 / 2 energy level 6HJ (J= 5 / 2, 7 / 2, 9 / 2, 11 / 2) transitions. All the examples of complex structure have a similar mechanism of TL.