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】聚合物基复合材料模压成型过程固化度与非稳态温度场的数值模拟

方双全，谢怀勤，陈辉

复合材料学报2003年10月第20卷第5期/ACTA MATERIAE COMPOSITAE SINICA Vol.20, No.5, October 2003，-0001，（）：

-1年11月30日

摘要

聚合物基复合材料模压成型过程固化度与温度的动态变化为强耦合关系。本文作者根据固化动力学和传热学理论，建立了非稳态温度场与固化动力学数学模型。通过DSC实验分析确定模型中固化动力学参数。利用有限单元与有限差分相结合的方法，建立了温度场和固化度数值模型。应用Euler逐步迭代法实现解耦。对聚合物基复合材料模压成型过程固化度与非稳态温度场动态变化进行计算机数值模拟，与试验测定结果吻合。为优化模压成型工艺提供理论依据。

聚合物基复合材料，模压工艺，固化度，非稳态温度场，数值模拟

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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 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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2008年04月24日

【期刊论文】SMC模压过程非稳态温度场数值模拟

方双全，谢怀勤，刘文博

哈尔滨工业大学学报2003年2月第35卷第2期/JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY Vol.35, No.2, Feb.,2003，-0001，（）：

-1年11月30日

摘要

SMC模压成型过程固化度与温度是强耦合关系。为了对SMC模压成型过程非稳态温度场与固化度进行数值模拟，依据固化动力学和非稳态导热理论，建立了温度场和固化度动力学模型。通过DSC试验分析确定模型中固化度动力学参数。利用有限单元与有限差分相结合的方法，建立了温度场和固化度数值模型。应用Euler逐步迭代法实现了计算机解耦，数值模拟与试验比较，结果吻合，为优化模压成型工艺提供了理论依据。

SMC，模压工艺，数值模拟，非稳态温度场，固化度

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