Abstract
YAG transparent ceramics with different microstructures were fabricated via solid-state reaction of high-purity powders. Influences of grain size, grain-boundary phases on the transmittance of the fabricated YAG ceramics were experimentally investigated. Our results confirm that the optical scattering loss in YAG ceramics is mainly caused by pores. Grain size did not influence the transmittance, and the grain-boundary phases with similar refractive index to the host only affected slightly the transmittance of the YAG transparent ceramics.
Highlights
Transparent ceramics have attracted considerable attention of research due to their potential applications in solid-state lasers [1,2,3,4,5], medical devices [6,7,8], and optoelectronic devices [9]
We showed that the existence of grain-boundary phases only affect slightly the transmission of the ceramics
Grain-boundary phase and pores are usually considered as the main factors affecting transmittance of ceramics [17]
Summary
Transparent ceramics have attracted considerable attention of research due to their potential applications in solid-state lasers [1,2,3,4,5], medical devices [6,7,8], and optoelectronic devices [9]. Among the transparent ceramics produced for application as laser gain host, Yttrium aluminum garnet (YAG) ceramics has been intensively investigated. The YAG single crystal has a high fracture strength, good chemical stability, excellent thermal and optical properties. It was widely used as solid-state laser gain hosts. Producing transparent YAG ceramics has non of these drawbacks. One can use the advanced ceramic fabrication technology to fabricate composite ceramic structures, which makes the development of a multifunctional laser feasible
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