Abstract
The study of the physical properties of alkali halide mixed crystals has been a subject of wide interest in the recent past. The main aim of this review is to provide a survey of the current state of knowledge about the nature of imperfections present and their role in understanding various properties associated with alkali halide mixed crystals. An attempt has been made to distinguish different types of mixed crystals, the conditions for the formation of a mixed crystal, the local strains that arise in the lattice due to the difference in the size of the ions that constitute the mixed crystal. The results obtained from various studies such as ionic conductivity, dielectric loss, microhardness, radiation hardening, colour centres, thermoluminescence, optical absorption etc. on alkali halide mixed crystals are presented. The non-linear variation of electrical conductivity, microhardness, half widths of many colour centre bands with composition have been discussed in terms of the concentration of various defects present in them. The aspects of the problem described include: 1.a) Dislocation density and distribution studies.2.b) Influence of dislocations and grain boundaries on transport properties of these crystals.3.c) Role of ionic size on microhardness.4.d) Lesser rate of hardening in mixed crystals due to irradiation.5.e) Stability of colour centres in mixed crystals in comparison with the end products, finally the present position and out look are summarized.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
