In this study, three different thicknesses of Ga2O3 dielectric layers were grown on Al0.3Ga0.7N/GaN structures leading to metal-oxide-semiconductor-HFET or MOSHFET structures. X-ray diffraction...

Key words:alumina; aluminium hydroxide; appraisal by XRD 铝的氧化物、氢氧化物有多种晶型,晶型不同用 途也完全不同。X射线衍射仪在区别铝的氧化物、 氢氧化物的晶型方面有优势。笔者用 X射线衍射 仪鉴定铝的氧化物、氢氧化物的类型。 1 铝的氧化物的晶型

2020年10月1日 · XRD patterns of the prepared α-Al 2 O 3 nanoparticles showed that the diffraction peaks of 2Ɵ ~ 43.8°, 35.0°, 57.4°, 25.4°, 68.1°, 52.5°, 37.7°, and 66.5°, and results also showed that the nanoparticles have a polycrystalline and a rhombohedral structure.

2021年1月1日 · There are two main structural “polymorphs” of transition aluminas that form during high temperature calcination of γ-Al2 O 3. The two structural types have been designated as δ- and θ-Al 2 O 3. Both structures have oxygen atoms arranged in a near FCC sub-lattice, and both have Al 3+ arranged in tetrahedral and octahedral sites.

This paper will explore the possibilities of obtaining hard α-Al2O3 with intense chromium luminescence in PEO coatings by using the chromium impurities naturally present in the substrate material...

In this work, highly porous g-Al2O3 nanoshells were synthesized from alumina coated carbon black (CB) obtained from a new deposition technique and used for removal of CR dye from aqueous...

This work is an original example to compare the results obtained after calcination of Al2O3 hydroxides and oxidation of alumino-formers alloys. FTIR and XPS signatures were obtained for various oxi...

结果表明: 随着氧化铝添加量的增加, 粉末烧结过程中生成物的物相由+4价的稀土氧化物变成+3价的稀土氧化物, 通过X射线衍射(XRD)图谱可知先生成CeAlO 3 相, 随着CeAlO 3 相特征峰减弱至消失并被CeAl 11 O 18 相替代, XRD峰宽化, 特征峰较弱, 半高宽较大, 晶粒尺寸较小 ...

The α‐Al2O3 plates produced from calcining the mixture of Al(OH)3 and NaCl at 700°C have an average diameter of 3 µm, an average diameter/thickness ratio of 10 and a specific surface area of ...

2020年12月1日 · Although the XRD pattern of δ-Al 2 O 3 shows more and sharper peaks than that of γ-Al 2 O 3, only recently the structure of δ-Al 2 O 3 has been solved. A combination of high-angle annular dark field electron microscopy imaging, XRD refinement, and DFT calculations indicated that δ-Al 2 O 3 consists of an intergrowth of two crystallographic ...