花束BN纳米囊分级结构的制备及其生长机理  

Preparation and Growth Mechanism of Novel Flower-like Boron Nitride Nano-capsule Hierarchical Structures

作　　者：吉钰纯 廖和杰 谷云乐[2] 郑国源[1] 王吉林 何金云[1] 龙飞[1] JI Yuchun;LIAO Hejie;GU Yunle;ZHENG Guoyuan;WVNG Jilin;HE Jinyun;LONG Fei(School of Materials Science and Engineering,Key Laboratory of Nonferrous Materials and New Processing Technology of Ministry of Education,CollaborativeInnovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guilin University of Technology,Guilin 541004,China;School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]桂林理工大学材料科学与工程学院,有色金属及材料加工新技术教育部重点实验室,广西有色金属隐伏矿床勘查及材料开发协同创新中心,广西桂林541004 [2]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《材料科学与工程学报》2019年第5期784-789,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(51741204);广西高校中青年教师基础能力提升计划资助项目(KY2016YB187);广西自然科学基金资助项目(2016GXNSFBA380155)

摘　　要：使用镁粉和氧化硼粉为原材料,通过自蔓延高温合成(SHS)辅助退火法制备出六方氮化硼(h-BN)材料。对产物的形貌、结构、物相、化学组成和光电性能进行表征分析。研究表明:BN样品呈新颖的花束纳米囊状分级结构,花束平均直径约为1μm。组成花束结构的每一个BN纳米锥为中空结构,平均长度和壁厚分别约为500和40nm,样品的光学带隙为5.62eV。对花束BN纳米囊分级结构的形成起关键影响作用的工艺参数是原料的配比。提出了花束BN纳米囊分级结构在制备过程中可能发生的化学反应过程及其生长机理。Flower-like boron nitride(BN) nano-capsules were prepared by self-propagation high-temperature synthesis and annealing route method using boron powder and magnesium powder as raw materials. The as-synthesized products were characterized conventionally. Characterization results indicated that the flower-like boron nitride nano-capsule hierarchical structures demonstrated hexagonal polycrystalline with an average diameter of about 1μm. And the BN nano-cones in the hierarchical structures revealed hollow morphology with an average length and wall thickness of 500 nm and 40 nm respectively. In addition, UV-Vis analysis indicated that the optical band gap of the sample was 5.62 eV. Besides, comparative experiment revealed that the raw material ratio palyed a significant role for growth of this novel h-BN hierarchical structures. Finally, based on the experiment results, the reasonable chemical reaction processes and the corresponding growth mechanism of the flower-like boron nitride nano-capsule hierarchical structures were also discussed.

关 键 词：氮化硼 纳米囊 自蔓延高温合成 退火 空心结构 

分 类 号：O613.61[理学—无机化学]