Rapid fabrication of extremely thin Nano-Al2O3 transparent ceramic wafers through nonaqueous tape casting. Issue 21 (1st November 2021)

• Record Type: Journal Article
• Authors: He, Yu; Cai, Yunxiang; Zhang, Ling; Liu, Kaige; Liu, Gang; Xiang, Bingxi; Zhai, Jianpang; Kong, Ling Bing; Zhang, Tianshu; Liu, Yin
• Is Part Of: Ceramics international. Volume 47:Issue 21(2021)
• Page Start: 30677
• Page End: 30684
• Publication Date: 2021-11-01
• Subjects: Tape casting -- Electron microscopy -- Al2O3 -- Substrates; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.07.246
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Al2 O3 transparent ceramics have important applications in electronics, solid-state lighting, military and 5G industries. At present, thin and large-size Al2 O3 ceramics are urgently required by enterprises. Tape casting method has emerged as a powerful tool in producing transparent ceramics, but the preparation of the slurries is generally very time consuming. In this study, a one-step ball milling process was proposed to fabricate Al2 O3 transparent ceramics through non-aqueous tape casting, in which green tapes were obtained with uniform texture and no distortion. Thickness of the Al2 O3 transparent ceramics approached 0.1 mm. The effects of dry pressing on single and double-layer tapes were also compared. It was found that dry pressing has essentially no effect on monolayer samples, but contributed to improve the densification and promoted grain growth of the bilayer samples. Our results could be used as reference for the preparation of extremely thin Al2 O3 transparent ceramic wafers.