Research on the Large-scale Preparation of Ultrafine LaB6 Powders by Salt-assisted Combustion Synthesis and Its Sintered Properties

doi:10.11896/cldb.21010240

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	Research on the Large-scale Preparation of Ultrafine LaB6 Powders by Salt-assisted Combustion Synthesis and Its Sintered Properties
	An, Ning 2; Wu, Haokai 2; Zhu, Min 1; Zheng, Yuehong 2; Zhan, Faqi 2; La, Peiqing 1,2
刊名	Cailiao Daobao/Materials Reports
	2022-06-10
卷号	36 期号:11
关键词	Combustion synthesis Field emission High resolution transmission electron microscopy Lanthanum compounds Particle size Scanning electron microscopy Vickers hardness X ray photoelectron spectroscopy Hot pressed sintering LaB6 powder Large scale preparation Property Relative density Salt-assisted Salt-assisted combustion synthesis Spark-plasma-sintering Ultra-fines Ultrafine
ISSN号	1005-023X
DOI	10.11896/cldb.21010240
英文摘要	LaB6 is an excellent cathode material for field emission, with strong anti-radiation and anti-poisoning pollution capabilities. It is widely used in military and high-tech fields such as aerospace, electronic industry, instrumentation and medical equipment. In this work, kilogram-scale LaB6 powders were successfully prepared by the salt-assisted combustion synthesis method. The LaB6 powder was characterized by X-ray diffraction (XRD), cold field emission scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). LaB6 particles adopted the cubic phase with the average particle size of 345-890 nm, and the purity is higher than 99.9%. Then, the LaB6 bulk materials were obtained by spark plasma sintering (SPS) and hot sintering under the same sintering pressure of 35 MPa at different sintering temperatures of 1 600-1 800 and 1 800-1 900 respectively. As a result, the sintered materials with relative densities of 93.50% and 95.75% were obtained. The Vickers hardness of the hot pressed sample at 1 900 was measured to be (14.83±1) GPa by HBRVU-187.5 Brinell Rockwell & Vickers optical hardness tester, and the flexural strength of the sample was calculated to be 137.04 MPa by the three-point bending method. © 2022, Materials Review Magazine. All right reserved.
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159079]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	An, Ning,Wu, Haokai,Zhu, Min,et al. Research on the Large-scale Preparation of Ultrafine LaB6 Powders by Salt-assisted Combustion Synthesis and Its Sintered Properties[J]. Cailiao Daobao/Materials Reports,2022,36(11).
APA	An, Ning,Wu, Haokai,Zhu, Min,Zheng, Yuehong,Zhan, Faqi,&La, Peiqing.(2022).Research on the Large-scale Preparation of Ultrafine LaB6 Powders by Salt-assisted Combustion Synthesis and Its Sintered Properties.Cailiao Daobao/Materials Reports,36(11).
MLA	An, Ning,et al."Research on the Large-scale Preparation of Ultrafine LaB6 Powders by Salt-assisted Combustion Synthesis and Its Sintered Properties".Cailiao Daobao/Materials Reports 36.11(2022).