溶液燃烧法合成Cr~(3+)掺杂LaBO_3粉体的研究
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摘要
采用溶液燃烧法,以水合硝酸镧、硼酸和甘氨酸为原料,九水硝酸铬为改性剂,合成了Cr~(3+)掺杂的硼酸镧粉体La_((1-x))CrxBO_3(x=1%~5%)。对产物分别进行X射线衍射、红外光谱、扫描电镜、紫外-可见漫反射光谱及荧光光谱等分析,考察了Cr~(3+)掺杂量、煅烧温度和煅烧时间等工艺参数对产物的物相组成、形态结构及发光性质的影响。结果表明,Cr~(3+)的掺杂量为4%,煅烧温度为900℃,煅烧时间为4h时,Cr~(3+)掺杂改性LaBO_3效果最佳。掺杂Cr~(3+)的LaBO_3在200~800nm范围内均有较强的紫外吸收峰;在355nm和383nm处有很强的发射宽峰,发光强度明显增强。
The Cr~(3+)doped LaBO_3 powder was synthesized by solution combustion method using lanthanum nitrate hydrate,boric acid,glycine as raw materials and chromic nitrate hexahydrate as modifier.The products were analyzed by X-ray powder diffraction(XRD),infrared spectroscopy(FT-IR),ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS),scanning electron microscopy(SEM)and photoluminescence spectroscopy(PL),respectively.The effects of Cr~(3+)doping content,calcination temperature and holding time on the phase composition,morphology and luminescence properties of the products were investigated.The optimum experimental conditions are as follows:the doping amount of Crwas 4%,the calcination temperature was 900℃and the calcination time was 4 h.Cr modified LaBO_3 appear strong ultraviolet absorption peak in the whole range of 200-800 nm,and strong emission peaks at 355 nm and 383 nm.Meanwhile the luminescence intensity was enhanced obviously.
The Cr~(3+)doped LaBO_3 powder was synthesized by solution combustion method using lanthanum nitrate hydrate,boric acid,glycine as raw materials and chromic nitrate hexahydrate as modifier.The products were analyzed by X-ray powder diffraction(XRD),infrared spectroscopy(FT-IR),ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS),scanning electron microscopy(SEM)and photoluminescence spectroscopy(PL),respectively.The effects of Cr~(3+)doping content,calcination temperature and holding time on the phase composition,morphology and luminescence properties of the products were investigated.The optimum experimental conditions are as follows:the doping amount of Crwas 4%,the calcination temperature was 900℃and the calcination time was 4 h.Cr modified LaBO_3 appear strong ultraviolet absorption peak in the whole range of 200-800 nm,and strong emission peaks at 355 nm and 383 nm.Meanwhile the luminescence intensity was enhanced obviously.
引文
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[11]夏延秋,贾正锋,刘维民.硼酸镧的制备方法:中国,102101676A[P].2011-06-22.
[12]崔梦豪,陈兴宇,张为军.硼酸镧玻璃的结构和热学性能研究[J].电子元件与材料,2017,36(2):29-33.
[13]叶毅,董浚修,陈波水,等.纳米硼酸镧对润滑油抗磨性能影响的研究[J].润滑与密封,2000(2):23-24.
[14]胡锋超.低维硼酸镍/硼酸镧纳米材料的合成及表征研究[D].杭州:浙江工业大学,2011.
[15]Tukia M,H9lsJ,Lastusaari M,et al.Eu3+doped rare earth orthoborates,RBO3(R=Y,La and Gd),obtained by combustion synthesis[J].Optical Materials,2005,27(9):1516-1522.
[16]蔡建亮,林利添,汤利,等.Al18B4O33∶Cr3+荧光粉的制备及发光性质研究[J].发光学报,2014,35(3):282-286.