摘要
用高温熔融法,把Eu2O3掺入到P2O5 BaO Na2O K2O与Na2O TeO2 ZnO系统玻璃中。测定了玻璃的荧光光谱与激发光谱。结果表明,Eu离子在P2O5 BaO Na2O K2O玻璃中呈现出Eu3+态。然而在Na2O TeO2 ZnO系统玻璃中,尽管在空气气氛下,大部分的Eu离子在玻璃中以二价的状态存在。从玻璃的结构及化学组分解释了产生Eu2+的原因。在磷酸盐玻璃配料中加入适量的硅粉(Si)作还原剂,能有效地把玻璃中的极大部分Eu3+还原成Eu2+,获得含Eu2+的优质透明磷酸盐玻璃。
The preparations and optical spectra of Eu^(2+) ions doped-glass have been attracted much attentions due to their applications in optical devices such as Faraday rotators, lasers, high dense light storage and so on. In order to obtain more Eu^(2+) ions, many complex preparations have been done, for example under strong reductive atmosphere and so on. It is necessary to explore easy and simple method that can obtain glasses with high concentration of Eu^(2+). In the present paper, under air atmosphere Eu_2O_3 incorporated P_2O_5-BaO-Na_2O-K_2O glasses and Na_2O-TeO_2-ZnO glasses were prepared by melting at 1 200 ℃. The emission spectra of Eu ions in the glasses were measured at room temperature. The structural and compositional effects on the valence-state of Eu ions were discussed. The results indicated that the Eu ions in the phosphate glass exist in the state of trivalent. However, some of the Eu ions in the Na_2O-TeO_2-ZnO glasses were divalent, although the glasses were prepared under air atmosphere. The Eu^(3+) ions could be effectively reduced to Eu^(2+) ions by the reductive action of silicon powder. Since the network of the tellurate glasses easily distorted and zinc oxide presented, Eu ions replaced the sites of the Zn^(2+) ions and the Eu^(2+) ions exist steadily in the glasses. The tellurate glasses containing overall Eu^(2+) ions with good optical property can be prepared by the proper melting processing and addition of silicon quantity.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2004年第6期644-648,共5页
Chinese Journal of Luminescence
基金
浙江省自然科学基金(502164)
宁波市教育局(2001426)资助项目
