以水系膠鑄成形方法製作高強度透明氧化鋁陶瓷

Research of High-strength Transparent Alumina Ceramics Made by Water-based Gel Casting

李國揚(K.Y. Lee) ； 向性一(H.I. Hsiang)

《鑛冶：中國鑛冶工程學會會刊》 64卷2期 (2020/06) Pp. 64-71

https://doi.org/10.30069/MM.202006_64(2).06

摘要

本研究使用以水作為溶劑的膠鑄成形方法來製作氧化鋁生坯。將氧化鋁粉體混和在溶劑中，使用硝酸鎂作為粒徑抑制劑，EDTA作為螯合劑，加入單體與起始劑產生聚合形成高分子有機物作為黏結劑，在分散均勻的情況下成坯，成形後的生坯機械強度足夠，相對密度最高達到63%以上。在1500°C進行無壓、空氣氣氛下燒結後，樣品內部呈現均勻且緻密化的微結構，粒徑大小約為1.5 μm左右，相對密度為99.7%，硬度接近24GPa。

關鍵字

膠鑄成形 ； 氧化鋁 ； 硬度 ； 相對密度 ； 無壓燒結

並列摘要

In this study, alumina green body was produced by water-based gel-casting. The alumina powder is mixed in a solvent, magnesium nitrate is used as a particle size inhibitor, and EDTA is used as a chelating agent. A monomer and an initiator are added to form a polymer as a binder. The green body formed by uniform dispersion has sufficient mechanical strength, density of 63%. After sintering at 1500 degree under air atmosphere, the sample has a uniform and dense microstructure inside. The particle size is about 2um, the relative density is 99.7%, and the hardness is close to 24GPa.

並列關鍵字

Gel-casting ； Alumina ； hardness ； relative density

參考文獻

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