Highly-oriented (104) polycrystalline α-Al2O3 transparent ceramics prepared by a templated grain growth method. Issue 4 (April 2019)

• Record Type: Journal Article
• Authors: Yang, Qinghua; Wang, Huanping; Chen, Shuilin; Zhang, Long; Xu, Shiqing
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 4(2019)
• Page Start: 1721
• Page End: 1724
• Publication Date: 2019-04
• Subjects: Polycrystalline α-Al2O3 -- Transparent ceramics -- Grain growth -- Oriented; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2018.11.033
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Highly-oriented (104) polycrystalline α-Al2 O3 transparent ceramics were prepared by a templated grain growth (TGG) method using A-plane single-crystal sapphire as the template. This is the first report, to best of our knowledge, on polycrystalline α-Al2 O3 ceramics oriented to non-optical axes. XRD and SEM results indicate that samples with high oriented grains and high-density structure are prepared. Compared to random samples, the oriented samples exhibited an increase in the real in-line transmittance (at 650 nm) from ∼23% to ∼62%. Moreover, the transmission remains a high level as the wavelength shifts toward the UV range (< 300 nm). This method can be extended to other uniaxial materials without optical axes in order to produce polycrystalline ceramics with excellent optical transparency.