Fabrication of AlON transparent ceramics with Si 3N 4 sintering additive

• DOI: 10.26599/jac.2023.9220760
• Publication Date: 2023-04-27T08:13:26Z
• Authors: Liqiong An; Rongwei Shi; Xiaojian Mao; Buhao Zhang; Jianmin Li; Jian Zhang; Shiwei Wang
• Keywords: Transparent ceramics; Hot isostatic pressing

In this paper, Si₃N₄ was used as a novel solid-state sintering additive to prepare AlON transparent ceramics with high transparency and flexural strength via the pressureless pre-sintering hot isostatic pressing (HIP) method at relatively low HIP temperature (1800 ℃). The effect of content on phase, microstructure, optical property, investigated. experimental results showed that Si element homogenously distributed in both pre-sintered HIPed ceramics. densification enhanced, grain grew increasing ceramics, all samples became pore-free after HIP, which favor transparency. doped 0.10 wt% had highest transmittance 83.8% 600 nm 85.6% 2000 (4 mm thickness), 404 MPa, were higher than those previous reports.