中国科技论文在线

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2008年04月24日

【期刊论文】Growth and optical properties of Mg, Fe Co-doped LiTaO3 crystal

方双全， Shuangquan Fang， Decai Ma， Tao Zhang， Furi Ling， Biao Wang

Optik 117 (2006) 72–76，-0001，（）：

-1年11月30日

Mg, Fe double-doped LiTaO3 and LiNbO3 crystals have been grown by Czochralski method. The optical properties were measured by two-beam coupling experiments and transmitted facula distortion method. The results showed that the photorefractive response speed of Mg: Fe: LiTaO3 was about three times faster than that of Fe: LiTaO3, whereas the photo-damage resistance was two orders of magnitude higher than that of Fe: LiTaO3. in this paper, site occupation mechanism of impurities was also discussed to explain the high photo-damage resistance and fast response speed in Mg: Fe: LiTaO3 crystal.

Mg: Fe: LiTaO3 crystal， Exponential gain coefficient， Diffraction efficiency， Response speed， Photo-damage resistance

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2008年04月24日

【期刊论文】自蔓延高温合成TiB2/Al2O3复合材料的力学性能

方双全，乔英杰，姜鹏，黄冕，杨继军

稀有金属材料与工程2007年8月第36卷增刊1/RARE METAL MATERIALS AND ENGINEERING Vol.36, Suppl.1, August 2007，-0001，（）：

-1年11月30日

摘要

以普通商用TiO2为原料，与铝粉、碳化硼进行自蔓延(SHS)高温合成TiB2／Al2O3复合材料，通过差热和X射线衍射分析，确定了TiO2、Al及B4C的反应机制，得到了生成TiB2／Al2O3复合粉体的最佳工艺条件。测定了TiB2／AI203复合粉体相关的力学性能，得到材料的抗压强度为87.2MPa，抗弯曲强度为104.3MPa。SEM观察发现生成相中存在大量的气相或气孔，生成物微观区域不太均匀，材料的断裂形式主要为脆性断裂，生成物的颗粒尺寸为亚微米级。

差热分析；SHS；TiB2/， Al2O3复合材料

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2008年04月24日

【期刊论文】Fast photorefractive responsein LiNbO3 crystal co-doped with Fe/Sm ions

方双全， Sh. Q. Fang， X. H. Zhang， Y. J. Qiao， Fu. R. Ling， Y. Q. Zhao

Journal of Alloys and Compounds 438 (2007) 317–320，-0001，（）：

-1年11月30日

摘要

Sm: Fe: LiNbO3 crystal was grown by doping Sm2O3 in Fe: LiNbO3 crystal. The exponential gain coefficient, diffraction efficiency and photorefractive response time were measured by two-wave mixing experiment, respectively. it was found that the response speed was greatly improved by doping Sm ions in Fe: LiNbO3 crystal. Our analysis also showed that photoconductivity enhancement was responsible for improving the response speed in the Sm: Fe: LiNbO3 crystal.

Sm: Fe: LiNbO3 crystal， Exponential gain coefficient， Diffraction efficiency， Response time

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2008年04月24日

【期刊论文】Growth and characteristics of near-stoichiometric Zn: LiNbO3 crystals grown by TSSG method

方双全， Shuangquan Fang， Biao Wang， Tao Zhang， Furi Ling， Yequan Zhao

Materials Chemistry and Physics 89 (2005) 249–252，-0001，（）：

-1年11月30日

摘要

A series of near-stoichiometric Zn: LiNbO3 (Zn: NSLN) crystals were grown by the top seed solution growth (TSSG) method using K2Oas flux. Defect structures and Zn2+ occupation mechanism were analyzed and discussed by X-ray powder diffraction (XRD), differential thermal analysis (DTA), ultraviolet-visible (UV) absorption and infrared (IR) spectrum measurement. Moreover, we also found that the threshold concentration of ZnO in NSLN were between 2 and 3 mol%.

LiNbO3， Near-stoichiometric， Dsefect structure， Threshold

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2008年04月24日

【期刊论文】Growth and photorefractive properties of Zn, Fe double-doped LiTaO3 crystal

方双全， Shuangquan Fang， Biao Wang， Tao Zhang， Furi Ling， Rui Wang

Optical Materials 28 (2006) 207–211. ，-0001，（）：

-1年11月30日

摘要

Zn, Fe double-doped LiTaO3 crystals have been grown by the Czochralski method. The photorefractive properties and optical damage resistance were measured by the two-beam coupling experiments and transmitted facula distortion method, respectively. The results showed that the photorefractive response speed of Zn: Fe: LiTaO3 was about four times faster than that of Fe: LiTaO3, whereas the optical damage resistance was two orders of magnitude higher than that of Fe: LiTaO3. in this paper, site occupation mechanism of impurities was also discussed to explain the high optical damage resistance and fast response speed of Zn: Fe: LiTaO3 crystal.

Zn: Fe: LiTaO3 crystal， Exponential gain coefficient， Diffraction efficiency， Response speed， Optical damage resistance

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