Hard transparent AlON ceramic for visible/IR windows
Source abstract
Abstract
Abstract In this paper after providing a brief introduction on the mechanical properties, optical performances and various applications of aluminum oxynitride (AlON) ceramic, we have reviewed the fabrication methods of AlON powder and ceramic, respectively. Our collaborative work has recently demonstrated that AlON ceramic with high transmittance can be obtained by carbothermal reduction and nitridation (CRN) method through strictly controlling Al2O3/C ratio, powder processing, sintering temperature and holding time. It has been observed that the presence of pores and liquid phases in microstructure has negative effect on the improving of transmittance. In the final part of the review we have identified that certain rare earth doped AlON could be considered as attractive material candidates for the phosphor-converted white LEDs and light-emitting devices.
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