Abstract Using the nanopowders made by a reverse co-precipitation as raw materials, neodymium doped yttrium aluminum garnet (Nd:YAG) transparent ceramics were fabricated by vacuum pre-sintering with subsequent hot isostatic pressing (HIP) post-treatment. The green bodies were pre-sintered in vacuum at 1450oC–1800 °C for 2 h and then HIPed at 1750 °C for 3 h under 200 MPa Ar atmosphere. Densification behavior and microstructure of the Nd:YAG ceramics before and after the HIP-treatment were investigated. Influences of the annealing temperature on transmittance and microstructure of the Nd:YAG ceramics were also studied. The ceramics pre-sintered at 1750 °C for 2 h and post-HIPed at 1750 °C for 3 h without any additional annealing in air were shown to have the best in-line transmittance of 79.1% at 1064 nm.

中文翻译：

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真空预烧结和热等静压后处理共沉淀粉末制备 Nd:YAG 透明陶瓷

摘要 以逆向共沉淀法制备的纳米粉体为原料，通过真空预烧结和热等静压（HIP）后处理，制备了掺钕钇铝石榴石（Nd:YAG）透明陶瓷。生坯在真空中在 1450oC–1800 °C 下预烧结 2 小时，然后在 200 MPa Ar 气氛下在 1750 °C 下热等静压处理 3 小时。研究了 HIP 处理前后 Nd:YAG 陶瓷的致密化行为和微观结构。还研究了退火温度对 Nd:YAG 陶瓷透光率和微观结构的影响。陶瓷在 1750°C 下预烧结 2 小时并在 1750°C 下 HIP 后在 1750°C 下热等静压处理 3 小时，无需在空气中进行任何额外的退火，在 1064 nm 处具有 79.1% 的最佳在线透射率。