CAJ | 학술논문

用溶胶-凝胶法在弱还原气氛下合成了纳米级Ca3SiO5:Eu2+绿色荧光粉.研究了Eu2+浓度的含量对发光强度的影响,表明在Ca3SiO3:Eu2+中添加Eu2+的最佳含量为0.005 mol.x射线衍射分析表明:在1000～1200 ℃合成的Ca3SiO5:0.005 Eu2+样品为单相Ca3SiO5晶体.根据Scherrer公式计算样品的平均晶粒尺寸为30 nm左右,与扫描电镜分析结果基本相符.样品的发射光谱与激发光谱都为宽带谱,其中发射光谱是峰值为505 nm的不对称宽带谱,而激发光谱是主峰为374 nm的连续光谱.
용용효-응효법재약환원기분하합성료납미급Ca3SiO5:Eu2+록색형광분.연구료Eu2+농도적함량대발광강도적영향,표명재Ca3SiO3:Eu2+중첨가Eu2+적최가함량위0.005 mol.x사선연사분석표명:재1000～1200 ℃합성적Ca3SiO5:0.005 Eu2+양품위단상Ca3SiO5정체.근거Scherrer공식계산양품적평균정립척촌위30 nm좌우,여소묘전경분석결과기본상부.양품적발사광보여격발광보도위관대보,기중발사광보시봉치위505 nm적불대칭관대보,이격발광보시주봉위374 nm적련속광보.
Nano-sized fluorescent Ca3SiO5:Eu2+ powder was synthesized by the sol-gel method under a reduced atmosphere at low temperatures. The effect of Eu2+ content on the luminescence intensity was studied, and the best content of Eu2+ doped in Ca3SiO3:Eu2+ was found to be 0.005 mol. X-ray diffraction analysis results indicate that the Ca3SiO5:0.005Eu2+ sample synthesized at temperatures of 1 000-1 200 ℃ is single phase Ca3SiO5:Eu2+crystal. The sizes of the crystal grains of the phosphor are about 30nm,obtained by calculation according to the Scherrer formula, which are the same as the results observed by scanning electron microscopy. The emission and excitation spectra of the samples have both broad bands: the emission spectrum is a dissymmetric spectrum at the peak of 509 nm and the excitation continuum spectrum consists of main at 374 nm.