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愛吃蟲得金魚木蟲 (正式寫手)
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[求助]
有關于英文文獻中一段話求專業(yè)大神指教 已有4人參與
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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.這句話是指溫宿升高炭黑石墨化結構減少，無定型結構增多嗎？我感覺我糊涂了 |
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愛吃蟲得金魚
木蟲 (正式寫手)
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2樓2015-07-18 15:30:54
感謝參與，應助指數(shù) +1
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本帖內容被屏蔽 |
3樓2015-07-18 15:47:41
kexuecheng
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4樓2015-07-18 18:29:43
愛吃蟲得金魚
木蟲 (正式寫手)
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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樓2015-07-18 20:59:12
kexuecheng
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6樓2015-07-23 14:53:37
7樓2015-07-23 16:36:51
FMStation
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【答案】應助回帖
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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樓2018-06-24 16:15:49
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