Hong-Lan Liu,Lin-Lin Zhu,Xing-hao Tan,Xin Xu,Guang-Xiang Zhang,Yu-Jian Jian,Min-Min Dai,Jia-hao Chen,Hua-Tay Lin
Highly transparent Er 2 O 3 ceramics were fabricated at varied temperatures in the range of 1700–1850 °C for 8 h in vacuum environment using commercial Er 2 O 3 powders as starting materials and 1 at.% ZrO 2 as sintering additive, for the first time. The influence of sintering temperature on the microstructure and optical properties of Er 2 O 3 ceramics was investigated. The Er 2 O 3 ceramic sintered at 1850 °C had an average grain size of 6.2 μm and an in-line transmittance of 69% at 1100 nm, which reached the best transmittance level compared to the open literature. Therefore, the Er 2 O 3 ceramic doped with 1 at.% ZrO 2 as sintering additive developed in this study presented relatively smaller grain size and excellent optical quality, and could be a potential material for laser and photonic applications.
In this study, the effect of microcrcaks strengthening on damage evolution of Al 2 TiO 5 (AT) flexible ceramics was investigated by acoustic emission (AE). Results reveal that with increasing content of ZrO 2 , the strength of AT flexible ceramics improves gradually and the strain increases at first then decreases. When the content of ZrO 2 is 12% and 8%, the strength and strain at maximum stress are increased by 154.92% and 38.27%, respectively. In addition, thanks to the “strengthening effect” of ZrTiO 4 on grain boundary microcracks, the damage development thresholds ( σ min and σ onset ), elastic modulus and fracture toughness of AT flexible ceramics modified with ZrO 2 are significantly improved. Moreover, the visible transverse cracks and matrix shedding in ATZ-0 are the most, but the cumulative AE damage events in ATZ-8 and ATZ-4 are more than ATZ-0 at late stage, for which the fracture of ZrTiO 4 glass phase and crack branching induced by ZrTiO 4 should be responsible.
危险品化学品经营许可证（带存储）