Assessment of light scattering by pores in Nd:YAG transparent ceramics

Co-precipitation synthesis and vacuum sintering of Nd:YAG powders for transparent ceramics

“…The manufacturing process during this work is similar to that reported in our previous works [25][26][27][28][29] (2 at.% Nd:YAG) in distilled water. The precipitant solution was prepared by dissolving ammonium hydrogen carbonate (NH 4 HCO 3 , analytical grade) in mixed solvent of alcohol and distilled water.…”

Effect of the Fuels Glycine, Urea and Citric Acid on Synthesis of the Ceramic Pigment ZnCr2O4 by Solution Combustion

“…The most important effect of the fuel in the synthesis of ZnCr 2 O 4 can be appreciated in the diffuse reflectance percentages, when the glycine is used, the reflectance percentages in the visible spectrum are higher than urea and citric acid, for example with wavelength of 550 nm, the reflectance percentages are: 50% (glycine), 42,5% (urea), and 25% (citric acid), these results are a consequence of the presence of volumetric defects, because at the microscopic level the loss due to bulk scattering is a result of the interaction of the electromagnetic wave with the microstructure of the sample. The total scattering loss coefficient is attributed to surface scatter, resulting from material surface imperfections, and porosity 24 . When glycine is used, the porosity is higher that urea and citric acid, as it was showed in the FESEM micrographs, for that reason the scattering of light increases.…”

Direct thermal diffusion bonding of Nd:YAG/YAG composite transparent ceramics by vacuum sintering

“…Nevertheless, the thermal diffusion bonding technology of Nd:YAG/YAG ceramics has not yet been investigated systematically, and especially, the optimal conditions and underlying mechanism of diffusion across contact surfaces of bulk ceramics are seldom reported so far. We previously studied the synthesis of high purity and agglomeration-free YAG nano-powders [23][24][25], the influence of post-annealing and post-HIP on Nd:YAG ceramics [26,27], and light scattering loss of Nd:YAG ceramics by pores [28]. Most recently we fabricated composite Nd:YAG/YAG transparent ceramics by vacuum sintering.…”