High-temperature target infrared spectrum radiance study

Author(s):  
Feifei Xu ◽  
Yong Hu ◽  
Qiu Yin ◽  
Cailan Gong ◽  
Lingya Zhu ◽  
...  
1994 ◽  
Vol 52 (3-4) ◽  
pp. 439-446 ◽  
Author(s):  
H. Vilanove ◽  
M. Jacon ◽  
J.R. Jevais

2013 ◽  
Vol 750-752 ◽  
pp. 914-918
Author(s):  
Yong Qiang Zhang ◽  
Quan Sheng Liu ◽  
Mei Li

The 40ZnO-30SiO2-20B2O3-10Na2O:Sm3+ glass was prepared by high-temperature melting method. The structure and composition of the glass matrix was investigated by Infrared spectrum (IR). The absorption, excitation and emission spectra of the samples were tested, and the results showed that the glass can emit orange shade under light excitation. The emission peaks at 565nm, 604nm and 650nm wavelength were corresponding to the 4G5/26H5/2, 4G5/26H7/2 and 4G5/26H9/2 transition emission of Sm3+, while the 4G5/26H7/2 transition emission was the strongest. So the best Sm3+-doping molar concentration was 0.4%. The spectroscopic properties indicated that 40ZnO-30SiO2-20B2O3-10Na2O: Sm3+ was expected to become a new conversion material.


2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Xinquan Xu ◽  
Guilin Lu ◽  
Jun Yang ◽  
Xinhai Liu

High-modulus asphalt concrete (HMAC) is considered as an effective paving material for addressing the increasing heavy traffic and rutting problems. Therefore, one high-modulus agent was used in this study to prepare high-modulus asphalt binder with different dosages. The objective of this study is to investigate the performance and modification mechanism of high-modulus asphalt. The effects of high-modulus agent on the viscoelastic properties of asphalt with different dosages were quantified via rheological tests as compared to base binder and styrene-butadiene-styrene- (SBS-) modified asphalt. Moreover, the modification mechanism of the high-modulus agent was examined using fluorescence microscopy and infrared spectrum test. Based on rutting and dynamic modulus tests, the differences of road performances between high-modulus modified asphalt mixture and SBS-modified asphalt mixture were compared. The results demonstrate that the high-modulus agent improves the high-temperature performance and viscoelastic properties of the matrix asphalt. When the dosage increases to 6.67%, the modification effect is better than that of the SBS-modified asphalt. Furthermore, the results of the rutting test show that the high-modulus modified asphalt mixture has better resistance to deformation than the SBS-modified asphalt mixture. The dynamic modulus test further demonstrates that the high-modulus modified asphalt mixture exhibits superior performance in high-temperature range. Fluorescence microscopy shows that the high-modulus agent particles can swell in the asphalt to form polymer links that improve the viscoelastic properties of the asphalt. Based on the results of the infrared spectrum test, it can be concluded that a high-modulus agent changes the asphalt matrix via physical blending modification.


2013 ◽  
Author(s):  
Jie Wu ◽  
Zheng Liu ◽  
Hongxia Mao ◽  
Yanbin Dong

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