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難慰平生金蟲 (小有名氣)
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bb來(lái)之不易啊！50幣求翻譯個(gè)摘要！
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求求大神們�。。。� 2014-02-25_201222.JPG |
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RXMCDM
版主 (文壇精英)
- 翻譯EPI: 530
- 應(yīng)助: 401 (碩士)
- 貴賓: 1.908
- 金幣: 38947.6
- 散金: 4908
- 紅花: 88
- 沙發(fā): 4
- 帖子: 11453
- 在線: 1355.6小時(shí)
- 蟲號(hào): 2739168
- 注冊(cè): 2013-10-20
- 性別: GG
- 專業(yè): 一般管理理論與研究方法論
- 管轄: 論文翻譯
2樓2014-02-25 23:49:09
難慰平生
金蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
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- 蟲號(hào): 2426739
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- 性別: GG
- 專業(yè): 化學(xué)反應(yīng)工程
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Synthesis, X-ray diffraction and photoluminescence investigations of Eu3+ -doped SrBPO5phosphor has been carried out in order to characterize the material. PL emission spectrum of air heated SrBPO5:Eu3+ phosphor exhibits bands at 590, 614, 651 and 702 nm under 238 nm excitation, assigned to the 5D0-7FJ (J¼1, 2, 3, 4) transitions of Eu3+ ions. Of these transitions, the emission centered at 614 nm is the most prominent. Photoluminescence decay time and Time-resolved emission spectrometric (TRES) studies of Eu3+ were carried out with lem= 614 nm and lex=238 nm. It suggested that Eu3+ ions are present at two different sites and predominantly occupying Sr2+ sites in the host lattice. Judd–Ofelt intensity parameters and other radiative properties were evaluated from the emission spectrum by adopting standard procedure. The trend observed in the J–O parameters (O24O4) confirms the covalency exiting between the Eu 3+ ion and ligands as well as the asymmetry around the metal ion site. The color coordinates of the system were evaluated (x=0.558 and y=0.355) and plotted on a standard CIE index diagram. The observations showed that the SrBPO5:Eu3+ phosphor is very close to the red emission material. Photoluminescence intensity was compared with that of a commercial red phosphor for commercial utility purpose. It is observed that, the photoluminescence intensity of the prepared phosphor was 60% as compared to the commercial phosphor Y2O3: Eu. |
3樓2014-02-26 11:32:04
RXMCDM
版主 (文壇精英)
- 翻譯EPI: 530
- 應(yīng)助: 401 (碩士)
- 貴賓: 1.908
- 金幣: 38947.6
- 散金: 4908
- 紅花: 88
- 沙發(fā): 4
- 帖子: 11453
- 在線: 1355.6小時(shí)
- 蟲號(hào): 2739168
- 注冊(cè): 2013-10-20
- 性別: GG
- 專業(yè): 一般管理理論與研究方法論
- 管轄: 論文翻譯
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
難慰平生: 金幣+60, 翻譯EPI+1, ★★★★★最佳答案, 句子不是很通順，不過(guò)比我自己翻譯的好多了，那些專業(yè)詞匯我都翻譯不出。哎，都沒(méi)人翻譯了，最佳答案給你啦！謝謝�。。� 2014-02-27 11:01:34
難慰平生: 金幣+60, 翻譯EPI+1, ★★★★★最佳答案, 句子不是很通順，不過(guò)比我自己翻譯的好多了，那些專業(yè)詞匯我都翻譯不出。哎，都沒(méi)人翻譯了，最佳答案給你啦！謝謝�。。� 2014-02-27 11:01:34
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為表征經(jīng)空氣加熱的SrBPO5：Eu3 +熒光粉材料的PL發(fā)射光譜，我們對(duì)Eu3 +的摻雜SrBPO5熒光粉進(jìn)行合成、X射線衍射和光致發(fā)光研究。結(jié)果表明，在238nm激發(fā)后，發(fā)射譜帶處于590，614，651和702 nm處，屬于銪離子的5D0-7FJ（j= 1，2，3，4）躍遷。這些躍遷中，集中在614 nm處的發(fā)射最突出。我們?cè)贚EM=614納米和lex=238 nm處對(duì)Eu3 +離子的光致發(fā)光衰減時(shí)間和時(shí)間分辨發(fā)射光譜（TRES）研究結(jié)果表明，Eu3 +離子存在于兩個(gè)不同的點(diǎn)陣位，在主晶格主要占領(lǐng)Sr2+的點(diǎn)陣位。采用標(biāo)準(zhǔn)方法對(duì)Judd-Ofelt強(qiáng)度參數(shù)和其他輻射特性通過(guò)發(fā)射光譜進(jìn)行了研究。J-O參數(shù)（O24O4）觀察到的趨勢(shì)印證了除外圍繞該金屬離子點(diǎn)陣的不對(duì)稱性，Eu3 +離子和配體共價(jià) 。對(duì)系統(tǒng)的顏色一致性進(jìn)行了評(píng)價(jià)（X =0.558和y=0.355），并繪制在標(biāo)準(zhǔn)CIE指數(shù)圖上。觀測(cè)表明，SrBPO5：Eu3 +的熒光體與紅色發(fā)光材料非常接近。光致發(fā)光強(qiáng)度與使用于商業(yè)目的的商用紅色熒光粉進(jìn)行比較。據(jù)觀察，與商業(yè)熒光粉Y2O3：Eu比較時(shí)，制得的熒光粉的光致發(fā)光強(qiáng)度為60％。 O24O4為復(fù)制后引起的改變，自己根據(jù)原文重新修改，類似的還有5D0-7FJ（j= 1，2，3，4）等。 |
4樓2014-02-27 00:35:57
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