CAJ | 학술논문

采用自组装化学镀银技术制备了银包玻璃微珠核-壳粒子,并且运用X射线衍射仪、扫描电镜和电子能谱仪等对该核-壳粒子的物相和形貌等进行了表征.分析了该核-壳粒子的介电性能与结构的关系,并以此为屏蔽填料,研究了电磁屏蔽涂料的相关性能.结果表明,银粒子在玻璃微珠的表面包覆均匀且致密,该粒子的介电常数较包覆前大幅度提高.该电磁屏蔽涂料的导电性能随着填料的体积分数(下同)的增加而增加,达到25%时,其表面电阻率为0.050 7Ω/cm2.同时,在电磁波的频率范围为30～1 500MHz时,屏蔽效能达40～65 dB,并且该材料具有较好力学性能和耐环境性能.
채용자조장화학도은기술제비료은포파리미주핵-각입자,병차운용X사선연사의、소묘전경화전자능보의등대해핵-각입자적물상화형모등진행료표정.분석료해핵-각입자적개전성능여결구적관계,병이차위병폐전료,연구료전자병폐도료적상관성능.결과표명,은입자재파리미주적표면포복균균차치밀,해입자적개전상수교포복전대폭도제고.해전자병폐도료적도전성능수착전료적체적분수(하동)적증가이증가,체도25%시,기표면전조솔위0.050 7Ω/cm2.동시,재전자파적빈솔범위위30～1 500MHz시,병폐효능체40～65 dB,병차해재료구유교호역학성능화내배경성능.
Silver-coated glass microsphere core-shell particles were prepared by silver(Ag)electroless plating on the self-assembly monolayer technique.The core-shell particles were characterized by X-ray diffraction,scanning electron microscope and energy dispersive spectrometer.The relationship between the dielectric properties and the microstructure of the core-shell particles was analyzed.The related properties of the electromagnetic shielding coatings based on the core-shell particles were studied.The results show that the Ag shell of composite particles is even and compact.The dielectric constants of the core-shell particles are much bigger than before.The electric properties of the electromagnetic shielding coating increase with the increasing of the volume fraction of the shielding filler.When the volume fraction of the filler reached 25%,the surface resistivity of the shielding coating was 0.0507 Ω/cm2.At the same time,shielding effectiveness of the coating varied from 40dB to 65 dB when the frequency of electromagnetic wave ranged between 30MHz and 1 500MHz.The coating material had good mechanical properties and durability.