AlON:C透明陶瓷的光释光性能

Optically stimulated luminescence performance of AlON:C transparent ceramics

以高纯a-Al_2O_3粉与AlN粉为原料,采用无压烧结,通过气氛渗透,在烧制过程中掺入等量碳的方法制备AlON:C透明陶瓷,研究AlON:C透明陶瓷的光释光性能。结果发现:AlON:C透明陶瓷光释光衰变曲线都随着时间呈指数变化衰减,前期衰减快,后期衰减速率变慢;470 nm蓝光不能清空光释光信号,光释光有信号堆积现象。β射线辐照下,AlON:C陶瓷的光释光剂量响应曲线呈线性、亚线性,并有趋向饱和的特点;AlON:C透明陶瓷对b射线的光释光响应曲线在50 m Gy^50 Gy与50~100 Gy吸收剂量范围内呈非常良好的线性关系;在50~500 m Gy吸收剂量范围内,β与γ射线光释光响应线性良好,γ射线辐照下的光释光强度约为β射线辐照下的光释光强度的76%。

AlON：C transparent ceramics were prepared by pressureless sintering method with high purity γ-Al2O3 powder and A1N powder as raw materials, and the same amount of carbon was incorporated into A1ON transparent ceramics by atmosphere infiltration method, research the optically stimulated luminescence （OSL） performance of A1ON：C transparent ceramics. The OSL decay curves of A1ON：C transparent ceramics are exponentially decaying with time, fast at the beginning, and slowly later on. 470 nm blue light cannot empty the optically stimulated luminescence signal, which has a signal accumulation phenomenon. The OSL intensity response curves of A1ON：C irradiated under β-ray irradiation are linear to sub-linear and tend to be saturated. The OSL response curve of A1ON：C transparent ceramics for β-ray shows an excellent linear characteristic, respectively, in the range of 50 mGy-50 Gy and 50-100 Gy; in the range of 50-500 mGy, it shows an excellent linear characteristic to β-rays and y-rays. The intensity of OSL under γ-ray irradiation is about 76% of that of OSL under β-ray irradiation.