Hf：Fe：LiNbO3晶体的全息图像热固定及存储寿命  

HOLOGRAPHIC IMAGE THERMAL-FIXING OF Hf:Fe:LiNbO_3 CRYSTAL AND ITS STORAGE LIFETIME

作　　者：刘波[1] 李春亮[1] 毕建聪[1] 徐玉恒[2] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院,哈尔滨150080 [2]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《硅酸盐学报》2008年第2期166-170,共5页Journal of The Chinese Ceramic Society

摘　　要：在生长LiNbO3溶体中掺入2%（摩尔分数） HfO2和0.05%（质量分数）Fe2O3,采用提拉法技术生长2%Hf·0.05%Fe：LiNbO3晶体。对晶体进行极化后切割成片,再进行氧化和还原处理。进行了Hf：Fe：LiNbO3晶体全息图像热固定实验,加热温度为120℃,加热时间为40min,经过显影,在热定影实验中获得200h的无损读出结果。以Hf：Fe：LiNbO3晶体作为存储介质,进行热固定衰减时间、存储寿命τ0测试。结果表明：Hf：Fe：LiNbO3晶体中Fe离子激活能Ea=1.125 eV;τ0=6.1×10~9S：20℃下衰减时间为115年,比Fe：LiNbO3的衰减时间（5.2年）长20倍。Hf：Fe：LiNbO3 crystal codoped with 2%（in mole）HfO2 and 0.05%（in mass）Fe2O3 was grown by the Czochralski method. After polarization,the crystal was cut into several plates,and they were oxidized and reduced.An experimental study on holographic image thermal-fixing of Hf：Fe：LiNbO3 crystal was carried out.When the crystal was heated to 120℃for 40 min,the crystal could store images for 200 h after it had developed;after 200 h,the crystal could no longer store images.The decay time of thermal fixing and the storage lifetime were measured using Hf：Fe：LiNbO3 crystal as storage material.The results show that the ion activation energy of Hf：Fe：LiNbO3 crystal is 1.125 eV,the storage lifetimeτ0 is 6.1×10~9 s,and the decline time is 115 a,which is 20 times greater than that of Fe：LiNbO3 crystal（5.2 a）at 20℃.

关 键 词：铪铁共掺铌酸锂晶体 热固定 存储寿命 提拉法 

分 类 号：O734[理学—晶体学]