Optical ceramics Nd3+:YAG (IMAGE) Far Eastern Federal University Caption experimental high-doped 4 at% Nd3+:YAG with residual porosity is less than 0.02 vol%, in-line optical transmittance is about 87% of the theoretical value, the microhardness of 13.2 GPa, and average grain size is near 740 nm. Credit Denis Kosyanov, FEFU PI REC for Advanced Ceramic Materials Research Usage Restrictions Denis Kosyanov, FEFU PI REC for Advanced Ceramic Materials Research License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.