NdSi(6-z)Al(1+z)O(z)N(10-z)（z = 0.4）的单晶 X 射线衍射结构测定。

Crystal structure of NdSi(6-z)Al(1+z)O(z)N(10-z) (z = 0.4) determined by single-crystal X-ray diffraction.

机构信息

School of Materials Science and Technology, China University of Geosciences (Beijing), No. 29 Xueyuan Road, Haidian District, Beijing, 100083, PR China.

出版信息

Dalton Trans. 2011 Feb 14;40(6):1261-6. doi: 10.1039/c0dt00658k. Epub 2010 Dec 23.

DOI:10.1039/c0dt00658k

PMID:21180765

Abstract

Single crystals of JEM-phase NdSi(6-z)Al(1+z)O(z)N(10-z) were successfully prepared from starting powders of Si₃N₄, AlN and Nd₂O₃ at 1700 °C for 3 h under nitrogen atmosphere. The z value of Nd-doped JEM-phase was determined to be 0.4 via determination of oxygen and nitrogen by elemental analysis. This result may be beneficial for overcoming the difficulty on preparation of single-phase JEM-phase Sialon materials and further characterization on their properties. The detailed crystal structure of Nd-Sialon was solved on the basis of single-crystal X-ray diffraction data for the first time. The space group is Pbcn (no. 60); a = 9.3060(6) Å, b = 9.7224(6) Å, c = 8.8777(5) Å; Z = 4; V = 803.22(8) Å³; D(c) = 3.971 g cm⁻³; R₁ = 0.0297 and wR₂ = 0.0739 for all reflections refined against F², with GooF value of 1.031.

摘要

成功地从 Si₃N₄、AlN 和 Nd₂O₃ 的起始粉末在氮气气氛下于 1700°C 下反应 3 小时制备出 JEM 相 NdSi(6-z)Al(1+z)O(z)N(10-z)单晶。通过元素分析确定 Nd 掺杂 JEM 相的 z 值为 0.4。这一结果可能有助于克服单相 JEM 相 Sialon 材料制备的困难，并进一步对其性能进行表征。首次基于单晶 X 射线衍射数据解决了 Nd-Sialon 的详细晶体结构。空间群为 Pbcn（No.60）；a = 9.3060(6) Å, b = 9.7224(6) Å, c = 8.8777(5) Å；Z = 4；V = 803.22(8) Å³；D(c) = 3.971 g cm⁻³；R₁ = 0.0297，wR₂ = 0.0739，所有反射的精修均基于 F²，GooF 值为 1.031。