Dr. İSMAİL ÖZGÜR ÖZER
Department of Materials Science and Engineering
Eskişehir Technical University, TR
Dr. İsmail Özgür Özer has been working as an academician in the Material Science and Engineering Department, Eskişehir Technical University (formerly Anadolu University) since 2001 and the founder of Magspin Advanced Technology A.Ş. His expertise is in the electronic and optical properties of ceramics and particularly in transparent ceramics; their production technologies and in-depth material characteristics. He has more than 20 scientific publications published in both national and international journals and conference proceedings. He also participated in 15 scientific research and development projects both as coordinator and researcher. Dr. Ozer holds 4 patents in relation with the transparent ceramic production.
Recent Technical Achievements in Transparent MgAl2O4 Ceramics
The potential of transparent MgAl2O4 (Mg-spinel) ceramics to be used in advanced applications such as transparent armor and IR-dome, which require high visible and IR-transmittance along with extreme durability, has been recognized for years. However, the use of these materials has been limited due to the optical inclusions even though the excellent transmission was possible to achieve. Recently, emerging powder synthesis and processing technologies that enabled the production of "laser quality" spinel ceramics with lower costs, pave also the way for civil applications, where high scratch resistance is required, such as watch and phone screens. Besides, a deeper understanding of structure-property relations resulted in the improved engineering properties and increased the chance of Mg-spinel among its single crystal and glass competitors in terms of the cost/performance rate, particularly for non-military applications. The cubic crystal structure of Mg-spinel both assures isotropic view in the visible and IR spectrum and provides available sites for doping. Therefore, the control of the defect structure with proper doping strategies will enable to control their ultimate properties along with the sintering and microstructure development. Powder processing in their fabrication allows local doping and accordingly functionally graded properties, which is hard to achieve in single crystals. Moreover, high temperature plastic deformation properties of the crystal structure have been utilized to achieve high sintering kinetics that yield to fine microstructures exhibiting high mechanical properties. It was also reported that the residual stresses developed during sintering in non-stoichiometric spinel can be used to increase the toughness. In this presentation, such recent technical achievements will be reviewed and the market response to these achievements will be reported.