摘要
为了探究稀土离子掺杂铝硅酸盐的光温特性,本文采用燃烧合成法制备了系列荧光粉材料Ca_(1-3x/2)Al_(2)Si_(2)O_(8):xEu^(3+)。X射线衍射结果表明掺杂Eu^(3+)离子不会改变基质CaAl_(2)Si_(2)O_(8)的晶体结构。荧光光谱结果表明该荧光粉在近紫外光区域具有较强吸收,当被波长为393 nm的近紫外光激发后,其最大特征发射峰为611 nm,且Eu^(3+)离子的最佳掺杂浓度为0.05。利用上升时间测温法研究了CaAl_(2)Si_(2)O_(8):Eu^(3+)荧光粉的光温传感特性,结果表明:随着Eu^(3+)掺杂浓度的增加,上升时间单调递减,但当掺杂掺杂超过0.100时就会发生淬灭。Ca_(0.98)5Al_(2)Si_(2)O_(8):0.01Eu^(3+)的相对灵敏度随温度的升高先增大后减小,并在520 K时达到最大值(0.024 K^(-1))。上述研究表明该荧光粉具备优异的温度传感性能,在测温领域具有广泛的应用前景。
To investigate the optical temperature characteristics of rare earth ion doped aluminosilicate,a series of phosphor materials Ca_(1-3x/2)Al_(2)Si_(2)O_(8):xEu^(3+) were prepared by combustion synthesis.The X-ray diffraction results show that the doping of Eu^(3+) ions does not change the crystal structure of the matrix CaAl_(2)Si_(2)O_(8).Fluorescence spectroscopy results show that the phosphor has strong absorption in the near-ultraviolet region.When excited by near-ultraviolet light with a wavelength of 393 nm,the phosphor material exhibits the maximum characteristic emission peak at 611 nm,and the optimal doping concentration of Eu^(3+) ion is 0.05.The optical temperature sensing characteristics of CaAl_(2)Si_(2)O_(8):Eu^(3+) phosphors were studied by the rise time method.The results show that the rise time monotonously decreases with the increase of Eu^(3+) doping concentration,but quenching occurs when the doping concentration exceeds 0.100.The test results of Ca_(0.985)Al_(2)Si_(2)O_(8):0.01Eu^(3+) show that the relative sensitivity increases first and then decreases with the increase of temperature,and reaches the maximum value of 0.024 K^(-1) at 520 K.The above research indicates that the phosphor has excellent temperature sensing performance and has broad application prospects in the field of temperature measurement.
作者
陈洋
戴武斌
胡金
樊烨明
黎华
徐慢
CHEN Yang;DAI Wubin;HU Jin;FAN Yeming;LI Hua;XU Man(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan430205,China)
出处
《武汉工程大学学报》
CAS
2021年第4期398-401,共4页
Journal of Wuhan Institute of Technology
基金
湖北省技术创新专项(2016ACA160)
武汉工程大学博士启动基金(16QD28)。
