高声学性能石墨烯基背衬材料
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- 英文论文题名：High acoustic performance of graphene based backing materials
- 论文作者：邱云峰 ; 马卓 ; 胡平安
- 英文论文作者：Yunfeng Qiu ; Zhuo Ma ; Ping An Hu ; Key Lab of Microsystem and Microstructure of the Ministry of Education ; Harbin Institute of Technology ; School of Life Science and Technology ; Harbin Institute of Technology
- 年：2016
- 作者机构：哈尔滨工业大学基础与交叉科学研究院微系统与微结构制造教育部重点实验室;哈尔滨工业大学生命科学与技术学院;
- 论文关键词：石墨烯 ; 环氧树脂 ; 背衬材料 ; 声阻抗 ; 声衰减
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十九分会：纳米碳材料
- 语种：中文
- 分类号：TB333
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十九分会 ; 纳米碳材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：177k
- 原文格式：D
- 会议级别：全国
摘要
目前制备服务于超声换能器的具有合适阻抗、高衰减和高强度的背衬材料受到广泛关注。通常背衬材料由聚合物基体如环氧树脂、聚氨酯和无机金属填充粉体如钨、铁、铜、锰、铝制备而成。传统方法制备的薄膜的吸声性能相对较差,为了提高环氧树脂复合物的衰减值,通常对环氧树脂进行表面修饰以增加对声波能量的耗散。利用石墨烯高热导率及声热效应快速将声波耗散,制备出一种高性能基于CVD三维石墨烯作为支撑骨架的钨和环氧树脂复合吸声薄膜,最佳薄膜的阻抗值为13.05±0.11 MRayl,声衰减达到110.15±1.23 d B/cm·MHz(at 9 MHz)。
Backing materials play important role in enhancing acoustic performance of ultrasonic transducer. Most backing materials prepared by conventional methods are failed to show both high acoustic impedance and attenuation, which however determine the band width and axial resolution of acoustic transducer, respectively. Taking advantage of the structural feature of 3D graphene foam as confined space for dense packing of tungsten spheres with the assistance of centrifugal force, desired structural requirement for high impedance is obtained. Meanwhile, superior thermal conductivity of graphene contributes to the acoustic attenuation via the conversion of acoustic waves to thermal energy.
Backing materials play important role in enhancing acoustic performance of ultrasonic transducer. Most backing materials prepared by conventional methods are failed to show both high acoustic impedance and attenuation, which however determine the band width and axial resolution of acoustic transducer, respectively. Taking advantage of the structural feature of 3D graphene foam as confined space for dense packing of tungsten spheres with the assistance of centrifugal force, desired structural requirement for high impedance is obtained. Meanwhile, superior thermal conductivity of graphene contributes to the acoustic attenuation via the conversion of acoustic waves to thermal energy.
引文
[1]Y.Qiu,J.Liu,H.Yang,F.Gao,Y.Lu,R.Zhang,W.Cao,P.Hu,J.Mater.Chem.C,2015,3:10848.
[2]Wang X,Qiu Y,Cao W,P.Hu,Chem.Mater.,2015,27:6969.
[2]Wang X,Qiu Y,Cao W,P.Hu,Chem.Mater.,2015,27:6969.