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Crystal Growth and Characterization of Ca3NbGa3Si2O14 Single Crystal

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Journal of Rare Earths 2006年第Z1期24卷 197-199页

作者： Shi Xuzhong yuan duorong Cheng Xiufeng Guo Shiyi Yu Guangwei Li Zhanfa State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

Single crystals of Ca3NbGa3Si2O14 (CNGS) with ordered Ca3Ga2Ge4O14 (CGG) structure were successfully grown from stoichiometric melts by conventional Czochralski technique along the a-axis and two large (001) facets and two small (100) facets appear in every crystal. An arrangement of parallel steps and a clear height change were observed in (001) facet by atomic force microscopy (AFM). High-resolution X-ray diffraction (HRXRD) results indicate that CNGS crystals have good quality and free low-angle boundaries. The crystals also exhibit good optical quality and high optical transmittance in c-direction.

关键词： czochralski method gallium compounds atomic force microscopy

A NEW NONLINEAR OPTICAL MATERIAL-ORGANOMETALLIC COMPLEX TRI-ALLYLTHIOUREA CADMIUM CHLORIDE

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Chinese Physics Letters 1989年第6期6卷 280-283页

作者： ZHANG Nan JIANG Minhua yuan duorong XU Dong TAO Xutang Institute of Crystal Materials Shandong UniversityJinan.

Tri-allyIthiourea cadmium chloride(ATCC),an organometallic complex,is a new nonlinear optical material with high second harmonic generation(SHG)*** single crystal of 30×30×25mm has been ***-prehensive studies of crystal growth,structure and general properties have been carried *** results show that organometallic complexes are promising nonlinear optical materials for wide applications.

关键词： effect. crystal nonlinear

A Potential Diode Laser Second Harmonic Generation Organic Crystal-MHBA

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Chinese Physics Letters 1991年第5期8卷 271-273页

作者： TAO Xutang yuan duorong ZHANG Nan JIANG Minhua SHAO Zhongshu Institute of Crystal Materials Shandong UniversityJinan 250100

A prospective new organic material:3-methoxy-4-hydroxy-benzaldehyde(MHBA)with powder second harmonic generation efficiency 30 times as large as that of urea and the cutoff wavelength of 370nm is *** belongs to monoclinic system space group P2_(1),and the unit cell parameters are:a=14.057Å,b=7.875Å,c=15.037Åandβ=115.45°,the general physicalchemical properties are also presented.

关键词： belongs benzaldehyde MHBA

Synthesis and Characterization of Er^(3+)∶Y_(3)Al_(5)O_(12) Nanocrystalline Powders Prepared by Sol-Gel Method

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Journal of Rare Earths 2006年第Z1期24卷 125-127页

作者： Li Zhanfa yuan duorong Duan Xiulan Shi Xuzhong Song Jian'an Wang Lihua State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Nano-sized Er^(3+)∶Y_(3)Al_(5)O_(12)powders was successfully prepared via a simple sol-gel route at as low a temperature at 800℃whereas a temperature much higher is necessary to obtain this compound by solid state synthesis(about 1500℃).The phase purity,composition and microstructural features of the materials were analyzed by means of X-ray diffraction(XRD),infrared spectroscopy(IR)and transmission electron microscopy(TEM),and no other intermediate phase were observed to form in the range of 700~1000℃.The luminescence spectra of Er^(3+)substituted for Y^(3+)in YAG in 1%content was characterized on samples at different temperature.

关键词： preparation YAG nanocrystalline powders sol-gel method

Study on Optical Activities of A3BGa3Si2O14 Crystals

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Journal of Rare Earths 2006年第4期24卷 391-391页

作者： Wei Aijian Wang Baolin yuan duorong School of Information Science and Engineering Shandong University Jinan 250100 China State Key Laboratory of Crystal Materials Shan- dong University Jinan 250100 China

Four crystals with the general formula of A3BGa3Si2O14 （A = Ca^2＋, Sr^2＋; B=Nb^5＋ , Ta^5＋） grown by using the Czoehralsky technique were reported. They are all uniaxial and belong to 32 point group. Their transmission, rotatory angle and specific rotation dispersion were investigated by speetrophotometer and compared with LGS. The transmission spectra show that they are transparent in the visible wavelength region beyond 294 nm and infrared region, and their transmission are all larger than that of *** transmission spectra between parallel polasizers show that they have large optical activities which are larger than that of LGS. Of the four crystals, Sr3NbGa3Si2O14 has the largest optical activity ： 240.75 （°）·mm^-1 at 0.30 μm wavelength, 34.73 （°） ·mm^-1 at 0. 633 μm wavelength. The Bohzmann＇s coefficients of these crystals were calculated, which were in good agreement with earlier measurement in other reference.

关键词： inorganic non-metallic materials crystal growth A3BGa3Si2O14 crystal optical activity boltzmann's coefficients rare earths

A_3BGa_3Si_2O_(14)类晶体的旋光特性研究

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中国稀土学报 2006年第4期24卷 507-509页

作者：魏爱俭王宝林袁多荣山东大学信息科学与工程学院山东济南250100 山东大学晶体材料国家重点实验室山东济南250100

报道了La3Ga5SiO14(LGS)同构物掺杂性改进后,用提拉法生长出A3BGa3Si2O14(A=Ca2+,Sr2+;B=Nb5+,Ta5+)系列的4种晶体。此类稀土晶体均为单轴晶,属三方晶系,32点群。采用改造过的分光光度计研究了这类晶体的透过率、旋光角、旋光率色散,并... 详细信息

报道了La3Ga5SiO14(LGS)同构物掺杂性改进后,用提拉法生长出A3BGa3Si2O14(A=Ca2+,Sr2+;B=Nb5+,Ta5+)系列的4种晶体。此类稀土晶体均为单轴晶,属三方晶系,32点群。采用改造过的分光光度计研究了这类晶体的透过率、旋光角、旋光率色散,并与LGS进行了比较。透射率光谱显示,ABGS类晶体在大于294 nm的可见光谱区和红外区是透明的,透过率均大于LGS。偏振光透过率曲线显示这类晶体自然旋光率较大,结果表明,这4种晶体的旋光率均大于LGS,其中SNGS旋光为最大,在波长0.30μm处,ρ=240.75(°).mm-1;在0.633μm处,ρ=34.73(°).mm-1。根据实验结果计算了这类晶体的波尔兹曼系数,与文献结果吻合很好。

关键词：无机非金属材料晶体生长 A3BGa3Si2O14系列晶体旋光率波尔兹曼系数稀土

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掺钴纳米玻璃陶瓷的光谱性质(英文)

硅酸盐学报 2006年第3期34卷 362-365页

作者：段秀兰袁多荣潘冬英李战发王丽华山东大学晶体材料国家重点实验室济南250100

采用溶胶-凝胶法分别制备和表征了绍分为5ZnO（5MgO，5Li2O）-6Al2O3—89SiO2—0．4CoO的掺钴硅酸铝锌（镁，锂）纳米玻璃陶瓷材料。这3种玻璃陶瓷的结晶温度分别为900，1000℃和850℃，对应的结晶相分别为：ZnAl2O4，MgAl2O4和β-锂辉... 详细信息

采用溶胶-凝胶法分别制备和表征了绍分为5ZnO（5MgO，5Li2O）-6Al2O3—89SiO2—0．4CoO的掺钴硅酸铝锌（镁，锂）纳米玻璃陶瓷材料。这3种玻璃陶瓷的结晶温度分别为900，1000℃和850℃，对应的结晶相分别为：ZnAl2O4，MgAl2O4和β-锂辉石、方石英，晶粒度在10～30nm之间。主要研究了纳米玻璃陶瓷的吸收和发光性质，它们在可见光及近红外区域具有相似的吸收和发光特性。在这3种纳米玻璃陶瓷中，Co^2＋分别占据ZnAl2O4，MgAl2O4及β-锂辉石纳米晶的四面体晶格位置，四面体配位Co^2＋的存在是产生这些吸收和发光峰的主要原因。

关键词：纳米晶溶胶-凝胶吸收和发光光谱掺钴

高效倍频有机非线性晶体MHBA的倍频光产生

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中国激光 1993年第3期20卷 194-197页

作者：张囡袁多荣陶绪堂邵宗书蒋民华许东山东大学晶体材料研究所济南250100

本文对新型有机材料MHBA进行了倍频转换实验,对调QNd∶YAG脉冲激光器产生的1064nm基频光的转换效率高达58.94％;同时产生了400～450nm连续可调的蓝紫光,转换效率约为6％。

关键词： MHBA晶体倍频激光材料激光器

Crystal growth and properties of Co2+ doped Y3Sc2Ga3O12 single crystal

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Crystal growth and properties of Co2+ doped Y3Sc2Ga3O12 sing...