| Abstract Scope |
Infrared (IR) transparent ceramics are important key components for IR sensing technologies. Since mechanical properties of most of the well-known IR transparent monolithic ceramics is limited, high mechanical strength IR transparent ceramics are required. Reducing grain size is indeed one of the effective approaches to improve the mechanical properties in addition to the optical properties. However, in order to further improve the mechanical properties of the optical ceramics, other approaches are necessary. We have recently succeeded to fabricate IR transparent composite ceramics, which can simultaneously achieved good optical and mechanical properties. For example, Al2O3/MgAl2O4 composite, in which the surfaces of MgAl2O4 opt-ceramic was laminated by textured Al2O3 layer, was attained by a simple step spark-plasma-sintering (SPS). In my talk, we will report several IR transparent composite materials fabricated by SPS technique.
This work was supported by Innovative Science and Technology Initiative for Security Grant Number JPJ004596, ATLA, Japan. |