Highly-oriented (104) polycrystalline α-Al₂O₃ 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-Al₂O₃ 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.

高取向性（104）的多晶的α-Al ₂ ö _3个透明陶瓷通过使用A面的蓝宝石单晶作为该模板的模板晶粒生长（TGG）方法制备。这是第一份报告，以我们所知，对多晶的α-Al ₂ Ø ₃面向非光轴的陶瓷。XRD和SEM结果表明，制备了具有高取向晶粒和高密度结构的样品。与随机样本相比，定向样本的真实在线透射率（在650 nm处）从2​​3％增至62％。此外，随着波长移向UV范围（<300 nm），透射率保持较高水平。该方法可以扩展到没有光轴的其他单轴材料，以生产具有优异光学透明性的多晶陶瓷。