稀土氮化物ScN、YN微晶的制备与表征

doi:10.15541/jim20160083

无机材料学报 ›› 2016, Vol. 31 ›› Issue (11): 1171-1176.DOI: 10.15541/jim20160083

稀土氮化物ScN、YN微晶的制备与表征

丛日东^1,2, 崔航¹, 张健¹, 崔啟良¹

(1. 吉林大学物理学院与超硬材料国家重点实验室, 长春 130012; 2. 河北大学河北省光电信息材料重点实验室, 保定071002)

收稿日期:2016-02-02 修回日期:2016-04-11 出版日期:2016-11-10 网络出版日期:2016-10-25
作者简介:丛日东(1986–), 男, 博士, 教师. E-mail: congrd@126.com
基金资助:
国家自然科学基金(51172087);高等学校博士学科点专项科研基金(20110061110011);吉林大学研究生创新基金资助项目(2015140);河北省高等学校科学研究项目自筹资金项目(Z2015121)

Synthesis and Characterization of Rare Earth Nitride ScN and YN Microcrystalline

CONG Ri-Dong^1,2, CUI Hang¹, ZHANG Jian¹, CUI Qi-Liang¹

(1. Colledge of Physics and State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China; 2. Hebei Key Laboratory of Optic-electronic Information Materials, Hebei University, Baoding 071002, China)

Received:2016-02-02 Revised:2016-04-11 Published:2016-11-10 Online:2016-10-25
About author:CONG Ri-Dong. E-mail: congrd@126.com
Supported by:
National Natural Science Foundation of China (51172087);Specialized Research Fund for the Doctoral Program of Higher Education of China (20110061110011);Graduate Innovation Fund of Jilin University (2015140);College Science Research Project of Hebei Province (Z2015121)

摘要/Abstract

摘要：

利用直流电弧等离子体方法制备出稀土氮化物ScN、YN微晶, 这是一种快速、低成本、高产量的新方法, 可用来制备稀土金属氮化物。结构物性表征和能谱成分分析结果表明, 所制备的ScN晶体为满足化学计量比的单晶, 而YN晶体为非化学计量比的多晶, 其中Y的含量高于N。综合XRD、EDS、HRTEM和PL结果分析表明, YN晶体主要由大量随机取向的单晶颗粒组成, 单晶颗粒间分布着一些非晶的金属Y, 光谱结果分析表明YN中存在大量的N空位。此外, 对样品的微观结构形成机理进行了系统分析, 由于Y族金属氮化物中有限组分较高的解离压力以及产物在生长过程中经历较高的淬火速率(10³ K/s), 导致YN解离而形成的Y金属团簇的无序排列, 进而使其在冷却过程中形成了非晶结构。

关键词: 直流电弧等离子体方法, ScN、YN微晶, 化学计量比, 非晶金属Y

Abstract:

Rare earth nitride ScN and YN crystals were synthesized through direct nitridation of Sc and Y metals with nitrogen using plasma assisted direct current arc discharge method. This new method is fast, low cost and high yield for preparing rare earth metal nitrides. Structural and elemental characterization indicate that the as-synthesized ScN crystals are stoichiometric single crystalline and YN crystals are nonstoichiometric polycrystalline with random orientation single crystal particles. Considering XRD, EDS, HRTEM, and PL results of YN crystals, non-crystalline phase of metal Y is deduced to be formed in YN which contributes to the high contents of Y in EDS results. PL spectrum shows that the presence of large amounts of N vacancy in YN crystals. In addition, the microstructure formation mechanism of YN and ScN samples is analyzed. The difference between them is attributed to the high dissociation pressure of yttrium-group metal nitrides of limiting compositions as well as the high quench rate (10³ K/s) that would result in the disordered arrangements of the clusters of Y atoms and then forming non-crystalline structure upon quenching.

Key words: plasma assisted direct current arc discharge method, ScN, YN microcrystalline, stoichiometric, non-crystalline metal Y

中图分类号:

Q469

丛日东, 崔航, 张健, 崔啟良. 稀土氮化物ScN、YN微晶的制备与表征[J]. 无机材料学报, 2016, 31(11): 1171-1176.

CONG Ri-Dong, CUI Hang, ZHANG Jian, CUI Qi-Liang. Synthesis and Characterization of Rare Earth Nitride ScN and YN Microcrystalline[J]. Journal of Inorganic Materials, 2016, 31(11): 1171-1176.

图/表 4

图1 ScN(a)和YN(b)晶体的XRD图谱

Fig. 1 Typical XRD patterns of (a) ScN and (b) YN samples

图2 (a) ScN和(b) YN晶体的SEM照片

Fig. 2 SEM images of as-prepared (a) ScN and (b) YN. Insets are their corresponding EDS images

图3 研磨后ScN、YN细粉的TEM照片、SAED图案以及HRTEM照片

Fig. 3 Typical TEM analysis images of the finely ground ScN and YN (a, b) The insets are the corresponding SAED patterns of the regions marked in red circles. The circle marked regions are also correspondingly to for HRTEM characterization (c, d) showing ScN single crystalline structure corresponding to the (200) base plane, and YN polycrystalline structure composed of small single crystals with random crystallographic orientations

图4 YN的光致发光光谱(激光波长325 nm)图

Fig. 4 Photoluminescence spectrum of the as-synthesized YN crystals

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稀土氮化物ScN、YN微晶的制备与表征

Synthesis and Characterization of Rare Earth Nitride ScN and YN Microcrystalline

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