低熔点玻璃粉包覆<strong>FeSiAl</strong>合金的结构和电磁性能

doi:10.11901/1005.3093.2018.694

材料研究学报

2019, Vol. 33

Issue (6): 475-480 DOI: 10.11901/1005.3093.2018.694

研究论文

本期目录 | 过刊浏览

低熔点玻璃粉包覆FeSiAl合金的结构和电磁性能

张达理,刘育建(

),方俊

华东理工大学材料科学与工程学院上海 200237

Structure and Electromagnetic Properties of Glass D250 Coated FeSiAl Alloy Flakes

Dali ZHANG,Yujian LIU(

),Jun FANG

School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

引用本文:

张达理,刘育建,方俊. 低熔点玻璃粉包覆FeSiAl合金的结构和电磁性能[J]. 材料研究学报, 2019, 33(6): 475-480.
Dali ZHANG, Yujian LIU, Jun FANG. Structure and Electromagnetic Properties of Glass D250 Coated FeSiAl Alloy Flakes[J]. Chinese Journal of Materials Research, 2019, 33(6): 475-480.

全文: PDF(5371 KB) HTML

摘要:

将低熔点玻璃粉D250绝缘包覆剂与扁平化的FeSiAl合金粉末机械混合，进行热处理使D250熔融流动而包覆在片状FeSiAl粉末表面。借助XRD，SEM，XRF和EDS等手段研究了包覆后粉末的物相组成、表面形貌和元素组成；用矢量网络分析仪测试了材料在1~18 GHz频率范围内的电磁参数和反射损耗。结果表明，熔融包覆后的粉末形成均匀致密的包覆层，其复介电常数的实部降低到8左右。热处理温度为700℃时材料的最大反射损耗降至-40.10dB，有效频宽达到3.76 GHz。

关键词 ：金属材料, FeSiAl合金, 熔融包覆, 吸波性能

Abstract：

FeSiAl alloy flakes were coated with glass powder D250 of low melting point via a two-step process, i.e. FeSiAl alloy flakes and glass powders D250 were firstly blended by ball milling to prepare D250 powders covered FeSiAl alloy flakes and then which was heat treated at proper elevated temperature. The phase composition, surface topography and composition of the coated flakes were characterized by using XRD, SEM, XRF and EDS. The electromagnetic parameter and reflection loss were also assessed in the frequency range of 1~18 GHz by using vector network analyzer. The results show that a dense coating formed on the flakes with uniform appearance, which present a lower real part of their complex permittivity of about 8. The glass D250 coated FeSiAl alloy flakes with optimal performance could be acquired when the heat treatment process was conducted at 700℃, namely the maximum reflection loss depresses to -40.10 dB, and the effective bandwidth reaches to 3.76 GHz, respectively.

Key words： metallic materials FeSiAl alloy melt coating absorptivity

收稿日期: 2018-12-06

ZTFLH:

TM25

作者简介: 张达理，男，1993年生，硕士

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链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2018.694 或 https://www.cjmr.org/CN/Y2019/V33/I6/475

图1 FeSiAl磁粉及其包覆后的XRD谱

图2 FeSiAl磁粉及其包覆后的SEM照片

图3 FeSiAl磁粉熔融包覆后的EDS图

表1 D250玻璃粉XRF元素分析

图4 FeSiAl磁粉及其包覆后的复介电常数(a)复介电常数实部，(b)复介电常数虚部

图5 FeSiAl磁粉及其包覆后的复磁导率(a)复磁导率实部，(b)复磁导率虚部

图6 FeSiAl磁粉及其包覆后的反射损耗图

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