当前位置: X-MOL 学术J. Eur. Ceram. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fabrication and microstructural characterization of the novel optical ceramic consisting of α-Al2O3@amorphous alumina nanocomposite core/shell structure
Journal of the European Ceramic Society ( IF 5.8 ) Pub Date : 2018-03-05 , DOI: 10.1016/j.jeurceramsoc.2018.02.038
A. Eftekhari , B. Movahedi , G. Dini , M. Milani

In this study, α-Al2O3@amorphous alumina nanocomposite core-shell structure was synthesized from AlCl3 and the commercial α-Al2O3 nanoparticles as the starting materials via a wet chemical route. The results indicated that the shell material mainly comprised of ammonium chloride and boehmite phases. Boehmite was transformed to the amorphous and γ-Al2O3 phases after the calcination process and the shell material was completely converted to γ-Al2O3 at 1000 °C. However, for the α-Al2O3@amorphous alumina core-shell nanoparticles were completely converted to α-Al2O3 at 1000 °C. It can be concluded that α-Al2O3 core particles, as the seed crystalline, help to transforming of γ-Al2O3 phase as the shell material directly without forming transitional phases to α-Al2O3. The optical polycrystalline alumina was fabricated using spark plasma sintering of α-Al2O3@amorphous alumina core-shell nanocomposite. The body sintered has a final density of ∼99.8% and the in-line transmittance value is ∼80% within the IR range.



中文翻译:

制造和新颖光学陶瓷组成的α-Al系的微观结构表征2 ö 3 @amorphous氧化铝纳米复合材料芯/壳结构

在这项研究中,α-Al系2 ö 3 @amorphous氧化铝纳米复合材料的核-壳结构由合成的AlCl 3和市售的α-Al 2级ö 3通过湿化学路线的纳米粒子作为起始原料。结果表明,壳材料主要由氯化铵和勃姆石相组成。勃姆石转化为非晶态和在γ-Al 2 ö 3个阶段之后的煅烧过程和壳材料完全转化为γ-Al系2 ö 3在1000℃。然而,对于所述α-Al 2 ö 3@amorphous氧化铝核-壳纳米颗粒完全转化为α-Al系2 ö 3在1000℃。由此可以得出结论,α-Al系2 ö 3核粒子,作为种子晶体,有助于γ-Al系的转化2 ö 3直接而不形成过渡相到α-Al相作为壳材料2 ö 3。光学多晶氧化铝,使用放电等离子体的α-Al的烧结制造2 ö 3 @amorphous氧化铝核-壳纳米复合材料。烧结后的物体的最终密度约为99.8%,在线透射率在IR范围内约为80%。

更新日期:2018-03-05
down
wechat
bug