Abstract In this work, digital light processing (DLP) 3D printing technology was used to prepare silica glass parts. The effects of slurry mixing methods and solid loading on the rheological properties of the silica slurry were investigated. The viscosity of the multi-step mixing method was less than the one-step mixing method at different solid loadings. When the solid loading of the slurry was 60 wt%, the viscosity by the multi-step mixing method and the one-step mixing method was 2059.7 mPa s and 5461.2 mPa s respectively at a shear rate of 0.1 sec−1, with a difference of 3401.5 mPa s. The results of heat treatment experiments showed that transparent glass samples could be obtained when the solid loading was ≥40 wt%. The density of the sintered sample remained substantially constant as the solid loading increased, but the linear shrinkage gradually decreased. The heat treatment time could be reduced to less than 16 h by optimizing the debinding and sintering process using a simultaneous thermal analyzer. Glass samples with the relative density of more than 99% and a transmittance of more than 90% in the range of 300–1800 nm were acquired, and the microstructure and physical properties of the sintered glass were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and digital micro-Vickers hardness tester.

中文翻译：

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浆料混合方法和固体负载对基于DLP立体光刻的3D打印石英玻璃零件的影响

摘要 在这项工作中，数字光处理 (DLP) 3D 打印技术被用于制备石英玻璃零件。研究了浆料混合方法和固体负载量对二氧化硅浆料流变性能的影响。在不同的固含量下，多步混合法的粘度小于一步混合法。当浆料的固含量为 60 wt% 时，在 0.1 sec-1 的剪切速率下，多步混合法和一步混合法的粘度分别为 2059.7 mPa s 和 5461.2 mPa s，差异3401.5 毫帕秒。热处理实验结果表明，当固含量≥40 wt%时，可以获得透明玻璃样品。随着固体含量的增加，烧结样品的密度基本保持不变，但线收缩逐渐减小。通过使用同步热分析仪优化脱脂和烧结过程，热处理时间可以减少到不到 16 小时。在300-1800 nm范围内获得相对密度大于99%、透射率大于90%的玻璃样品，并通过扫描电子显微镜（SEM）对烧结玻璃的微观结构和物理性能进行表征， X 射线衍射 (XRD) 和数字显微维氏硬度计。