以诺卡氏菌为模板的微纳米Ni-Fe-P吸波材料的制备及性能研究  

Preparation and Performance of Wave Absorbing Materials by Metallization of Nocadia

作　　者：韩宇[1] 李松梅[1] 刘建华[1] 于美[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室,北京100191

出　　处：《化学学报》2011年第1期53-58,共6页Acta Chimica Sinica

摘　　要：采用化学镀技术在经过敏活处理的诺卡氏菌表面制备微纳米Ni-Fe-P吸波材料.通过SEM(扫描电子显微镜),EDS(能谱仪),XRD(X射线衍射),VSM(振动样品强磁计)对材料形貌、成分、结构及磁性能进行了分析,并探讨了菌体化学镀前处理机理以及装载量对镀层质量、镀液利用率以及磁性能的影响.结果表明:采用敏活一步法可使菌体表面具备化学沉积的条件.随着诺卡氏菌装载量的提高,诺卡氏菌表面镀层粗糙化、球形颗粒增多且分解产物增多,当装载量为80 mL时,镀层的质量以及镀液的利用率最好.装载量的变化对镀层成分的影响不大,当装载量为80 mL时,镀层中Ni,Fe,P的质量分数分别为83.17%,6.12%,10.71%;装载量的变化对镀层的磁性能影响不大且镀层为典型的非晶态结构.采用矢量网络分析仪(VNA)对镀层的电磁参数进行了测量,结果表明:镀层在10～12,15～17 GHz频段具有较好的吸波性能,当吸收剂厚度为2 mm时,反射损耗可达27 dB.Micro/nano Ni-Fe-P wave absorbing materials were prepared on the surface of Nocadia pre-treated by electroless plating technique.The morphology,component,structure and magnetic property were characterized by SEM（scanning electron microscope）,EDS（energy dispersive spectrometer）,XRD（X-ray diffraction） and VSM（vibrating sample magnetometer）.The results clearly demonstrated that one-step method was in a condition to deposit on the surface of Nocadia,and the surface of plating was roughed with the increase of the spherical particles and decomposition products due to the effects of the load,the quality of plating and the utilization of electroless solution were the best when the load was 80 mL.The average contents of Ni,Fe and P element of the metal layer with 80 mL load（w） were about 83.17%,6.12% and 10.71%,respectively.The magnetic property was changed little by increasing of the load,and the plating was amorphous.The electromagnetic parameters were measured by VNA（vector network analyzer）,the re-sults showed that the reflection loss could reach 27 dB at the frequency of 10～12 and 15～17 GHz when the thickness was 2 mm.

关 键 词：化学镀 诺卡氏菌 前处理 装载量 吸波材料 

分 类 号：TB34[一般工业技术—材料科学与工程]