Composite YAG/2.0at%Nd:YAG transparent ceramic was fabricated by solid-state reactive sintering a mixture of
commercial α-Al2O3, Y2O3, and Nd2O3 powders with tetraethoxysilane (TEOS) and MgO as sintering additives. A fully
dense YAG/2.0at%Nd:YAG ceramic with an average grain size of ~20μm was obtained by vacuum sintering at 1750°C
for 50h. There are almost no pores or second phases present at grain boundaries or inner grains. The in-line transmittance
reached 83.6% at the lasing wavelength of 1064nm and 82.0% at 400nm. The porosity of the sample was at the level of
several vol ppm. The composite YAG/2.0at%Nd:YAG transparent ceramics are promising to generate high-energy laser.
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