纳米纤锌矿氮化硼的同步辐射真空紫外反射光谱与光学性质 |
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引用本文: | 苏夷希,巨新,魏坤,池元斌,韩正甫,石军岩,邓杰,施朝淑.纳米纤锌矿氮化硼的同步辐射真空紫外反射光谱与光学性质[J].物理学报,1994,43(10):1718-1725. |
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作者姓名: | 苏夷希 巨新 魏坤 池元斌 韩正甫 石军岩 邓杰 施朝淑 |
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作者单位: | (1)吉林大学超硬材料国家实验室; (2)中国科学技术大学合肥国家同步辐射实验室; (3)中国科学技术大学近代物理系; (4)中国科学技术大学物理系; (5)中国科学技术大学物理系,中国科学技术大学合肥国家同步辐射实验室 |
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摘 要: | 对冲击波法合成的纳米纤锌矿氮化硼(wBN)进行了同步辐射真空紫外区的反射光谱测量,得到波长范围100一240nm区间的反射光谱.利用Kramers-Kronig关系计算获得了它的光学常数和介电函数谱,并导出了光电导谱.获得了纳米wBN的光学禁带宽度实验值,为8.7±0.5eV.将以上结果和最新的理论计算进行了比较.观察到了经不同退火温度处理的纳米wBN样品结构及尺寸变化对反射光谱和光学性质的影响.
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关 键 词: | 氮化硼 冲击波合成法 光学性质 |
收稿时间: | 9/8/1993 12:00:00 AM |
REFLECTANCE SPECTRUM AND OPTICAL PROPERTIES OF NANO-wBN IN THE VUV REGION OF SYNCHROTRON RADIATION |
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Abstract: | The reflectance spectrum of different wBN was measured. The sample were prepared by shock-wave method and heat-treated at 100℃ and 500℃. The measurement was performed in the wavelength range of 100-240nm at the time-resolved spectroscopy station of National Synchrotron Radiation Laboratory in Hefei. The optical constants of wBN have been determined in the VUV region by applying the Kramers-Kronig relation to normal incidence reflectance data. It was found that the average value of optical band gap determined from these constants is 8.7±0.5eV. The dielectric constants, optical conductivity of wBN were also obtained. The effet of the charges of particle size and structure of the nanometer-sized wBN on the optical reflectance spectrum were further studied. |
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