摘要
采用共结晶-高温煅烧法和共混合-高温煅烧法合成了Gd2-xO2SO4:xEu3+系列荧光粉,用XRD、SEM和荧光光谱分析技术对样品的晶体结构、表面形貌及发光性能进行表征。结果表明:两种方法在950℃合成的Gd2-xO2SO4:xEu3+系列荧光粉都具有单一物相,在紫外波长激发下都发出618 nm红光。然而,发光强度和粒子特性存在差异,共结晶-高温煅烧法比共混合-高温煅烧法合成的样品显示出更强的红光和较好的粒子形貌。最佳的铕掺杂量x=0.10,最佳煅烧温度为950℃。荧光粉的粒度在500 nm左右。
A series of fluorescent powders of Gd2-xO2SO4:xEu3+ have been synthesized by two methods: the co-crystallization followed by calcinations (CCC) method and the co-mixture followed by calcinations (CMC) method. The as-prepared phosphors were examined by means of X-ray dif- fraction (XRD), scanning electron spectroscopy (SEM) and photoluminescence spectrometer (PLS). The results show that Gd2-xO2SO4:xEu3+ phosphors with single crystalline phase have been successfully prepared with both methods at calcinations temperature around 950 ℃, and emit red light at 618 nm under ultraviolet exitation. However, the emission strength and particle characteriza- tion are different. It is proved that the phosphors prepared by CCC method have stronger red emis- sion and better morphogy of the particles than that by CMC method. The optimal Eu doping content and calcinations temperature are determined to be x = 0.1 and 950 ℃. The particle size of as-syn- thesized phosphors is around 500 nm.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2013年第4期411-415,共5页
Chinese Journal of Luminescence
基金
科技部863课题(2010AA03A400)
科技部973课题(2012CBA01204)
国家自然科学基金(21261014
51274123)
江西省主要学术带头人资助计划(2007DD00800)资助项目
关键词
硫酸氧钆
共结晶
荧光粉
制备
gadolinium oxide sulfate
co-crystallization
phosphor
preparation