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爱吃虫得金鱼木虫 (正式写手)
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[求助]
有关于英文文献中一段话求专业大神指教 已有4人参与
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With increasing temperature, heating rate and weight loss, the amount of the graphitic structure was reduced at the expense of disordered structure.这句话是指温宿升高炭黑石墨化结构减少，无定型结构增多吗？我感觉我糊涂了 |
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FMStation
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【答案】应助回帖
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https://www.thefreedictionary.com/expense A loss for the sake of something gained; a sacrifice: achieved speed at the expense of accuracy. |
8楼2018-06-24 16:15:49
感谢参与，应助指数 +1
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3楼2015-07-18 15:47:41
kexuecheng
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4楼2015-07-18 18:29:43
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Raman spectra (Fig. 4) of studied samples confirm presence of two bands: (i) G band at 1,590 cm-1 and (ii) D band at 1,355 cm-1. G band confirms presence of graphitic structure and D band represents disordered structure which is form due to the breakdown of symmetry for atoms close to the edge of graphite sheet when formerly forbidden transitions became possible [6]. Parameters of Raman spectra such as the position m, the full width at half-maximum FWHM and areas I of the G and D bands are documented in the Table 3. Raman spectra of single-crystal graphite samples show band only at 1,575 cm-1. Increase of temperature and heating rate of pyrolysis leads to reduction of graphitic structure—position of mG shift to higher value and conversely FWHMG shift to lower value. This phenomenon was also observed andreported by Darmstadt et al. [6] who studied Raman spectra of CB p obtained by pyrolysis of STs at the temperature range 420–700 C. Reduction of graphitic structure is also confirmed by growing ratio ID/IG with increasing temperature. On the other hand, higher thermal treatment of CBc cause increase of intensity of graphitic structure [5] and position of mG decrease from about 1,600 cm-1 to around 1,575 cm-1 as the temperature increases from 27 to 2,727 C [5]. Compared to CBc Raman spectra of CBp most approaches to CB c denoted as N375 and N774. Probably these two carbon blacks were used as a filler during STs manufacturing. Linear relation (Fig. 5) was found between the intensities ID and IG and temperature of pyrolysis and weight losses of pyrolysed sample. With increasing temperature ration ID/IG increase and this dependence correlate with weight loss of pyrolysis of STs |
5楼2015-07-18 20:59:12
