Crystals of AgBr – TlBr0.46I0.54 system: Synthesis, structure, properties, and application

Highly transparent ceramics for the spectral range from 1.0 to 60.0 µm based on solid solutions of the system AgBr–AgI–TlI–TlBr

“…For two decades Ural Federal University has carried out research in the field of exploring and creating a new photonics' element base for optical and laser instrumentation, crystals [10,11,[25][26][27][28][29][30][31][32][33] . The key materials of our research are solid solutions of silver and monovalent thallium halides, such as AgCl-AgBr, AgBr-TlBr 0.46 I 0.54 , AgBr-TlI, AgCl-AgBr-TlBr 0.46 I 0.54 , AgCl-AgBr-TlI, AgCl-AgI, AgBr-AgI, and AgCl-AgBr-AgI.…”

“…These materials are transparent from visible to far IR, as well as in the terahertz (THz) range. Among other things, the materials have high ductility, which makes it possible to obtain windows and lenses from them by hot pressing, as well as by extrusion of fibers for the range of 2.0-25.0 μm [11,[27][28][29][30][34][35][36][37][38][39][40] .…”

“…Ceramics connect different crystal phases of two or more solid solutions of the AgBr-AgI-TlI-TlBr system. The boundaries of homogeneous and heterogeneous regions of solid solutions existence at low (298 K) temperatures were determined based on thermodynamic studies of AgBr-TlI and AgBr-TlBr 0.46 I 0.54 systems' new phase diagrams in the temperature range from 298 K to 773 K and at a pressure of 101.325 kPa [25,29,30,41] . The new systems are quasi-binary cross sections of the AgBr-AgI-TlI-TlBr section of the Ag-Tl-Br-I concentration tetrahedron [Figs.…”

“…It should also be noted that the AgBr-AgI-TlI-TlBr materials system has a number of significant advantages over the AgClbased system. It has increased material's photo and radiation stability [26,30,31,36] . Thus, as a result of replacing lighter elements with heavier ones, the material's stability to external negative environmental factors increases, which makes it possible to extend the life of optical products.…”

Methods for Properties Analysis of Crystalline Materials Based on Solid Solutions of Silver and Thallium (I) Halides

“…These devices require highly transparent optics as well as fiber optics to deliver the analytical signal to the receivers. There is a very limited number of materials suitable for the manufacture of fibers: chalcogenide [1], fluoride [2] and telluride [3] glasses, single crystals and ceramics based on silver and thallium (I) halides solid solutions [4][5][6]. The last of the materials covers the widest spectral range with low radiation absorption and high strength characteristics.…”