中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2013年
6期
1652-1660
,共9页
有序介孔碳%电磁波吸收剂%热处理%介电性能%电磁屏蔽效能
有序介孔碳%電磁波吸收劑%熱處理%介電性能%電磁屏蔽效能
유서개공탄%전자파흡수제%열처리%개전성능%전자병폐효능
ordered mesoporous carbon%electromagnetic (EM) wave absorber%heat treatment%dielectric property%electromagnetic interference (EMI) shielding effectiveness
通过模板法制备了有序介孔碳(OMC)，研究了有序介孔碳粉体在8.2~12.4 GHz (X波段)范围内作为轻质电磁波吸收剂的电磁屏蔽性能。在氮气保护的条件下对OMC粉体分别在1400、1600和1800°C进行2 h热处理。研究了热处理前后OMC微结构的变化，并测试了所得OMC粉体的介电常数。在1400°C下热处理所得OMC粉体试样的损耗正切(tanδ)高达3.1，远远高于未进行热处理的OMC试样的。通过将总的屏蔽效能分解为吸收和反射两部分，研究了OMC试样的电磁屏蔽效能。于1400°C和1600°C热处理后，OMC得到最高的电磁屏蔽效能其屏蔽机制以吸收为主，表明OMC具有作为微波吸收剂的潜力。
通過模闆法製備瞭有序介孔碳(OMC)，研究瞭有序介孔碳粉體在8.2~12.4 GHz (X波段)範圍內作為輕質電磁波吸收劑的電磁屏蔽性能。在氮氣保護的條件下對OMC粉體分彆在1400、1600和1800°C進行2 h熱處理。研究瞭熱處理前後OMC微結構的變化，併測試瞭所得OMC粉體的介電常數。在1400°C下熱處理所得OMC粉體試樣的損耗正切(tanδ)高達3.1，遠遠高于未進行熱處理的OMC試樣的。通過將總的屏蔽效能分解為吸收和反射兩部分，研究瞭OMC試樣的電磁屏蔽效能。于1400°C和1600°C熱處理後，OMC得到最高的電磁屏蔽效能其屏蔽機製以吸收為主，錶明OMC具有作為微波吸收劑的潛力。
통과모판법제비료유서개공탄(OMC)，연구료유서개공탄분체재8.2~12.4 GHz (X파단)범위내작위경질전자파흡수제적전자병폐성능。재담기보호적조건하대OMC분체분별재1400、1600화1800°C진행2 h열처리。연구료열처리전후OMC미결구적변화，병측시료소득OMC분체적개전상수。재1400°C하열처리소득OMC분체시양적손모정절(tanδ)고체3.1，원원고우미진행열처리적OMC시양적。통과장총적병폐효능분해위흡수화반사량부분，연구료OMC시양적전자병폐효능。우1400°C화1600°C열처리후，OMC득도최고적전자병폐효능기병폐궤제이흡수위주，표명OMC구유작위미파흡수제적잠력。
Ordered mesoporous carbon (OMC) powder was synthesized through template method to investigate its potential as an effective light weight electromagnetic interference (EMI) absorber in the frequency range of 8.2?12.4 GHz (X band). OMCs were heat-treated at 1400 °C, 1600 °C and 1800 °C, respectively, in nitrogen atmosphere for 2 h. The microstructures of the OMCs before and after heat treatment were studied. The dielectric property of the as-received OMC powders was measured. The average loss tangent (tanδ) of samples made from OMC powder heat-treated at 1400 °C was as high as 3.1, much higher than that of the sample made from OMC without heat treatment. Shielding mechanism was studied by resolving the total shielding effectiveness (SE) into absorption and reflection. Samples made from OMC powders heat-treated at 1400 °C and 1600 °C exhibit an EMI shielding behavior dominated by electromagnetic absorption mechanism, implying its promising perspective as electromagnetic wave absorbers.
