共查询到17条相似文献,搜索用时 15 毫秒
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水热法和熔盐法生长的Nb: KTP晶体成分和结构研究 总被引:1,自引:1,他引:0
利用激光剥蚀-电感耦合等离子体质谱、X射线衍射分析、显微激光拉曼光谱等测试手段研究了掺铌磷酸钛氧钾(Nb: KTP)晶体成分对结构的影响,分析比较了水热法和熔盐法生长的Nb: KTP晶体中Nb的含量及分布特征、晶体结构和化学键特征峰的变化等.结果表明:由于Nb的影响和NbO6八面体的收缩效应,Nb: KTP晶体的轴长发生了微小变化,晶胞体积有所减小,TiO6八面体和PO4基团的拉曼特征峰有不同程度漂移,其中水热法和熔盐法Nb: KTP晶体的有效分凝系数分别为0.268和0.348.同时,研究指出在Nb: KTP晶体生长时,应确定合理的掺Nb量. 相似文献
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利用LA-ICP-MS、XRD、LRS等测试手段研究熔盐法和水热法Nb∶ KTP晶体中Nb的含量及分布、晶体结构和化学键特征峰的变化,分析Nb的进入和生长方法对Nb∶ KTP晶体结构和拉曼光谱特征的影响.研究结果表明,Nb:KTP晶体中Nb的进入量增加,K的原子数比率减小;Nb∶ KTP晶体的晶胞体积由收缩效应和扩张效应协同作用共同决定,原料配比相同时,熔盐法晶体的晶胞体积大于水热法晶体的晶胞体积,故通过晶胞体积可在一定程度上区分晶体的生长方法.Nb的进入还使PO4基团和TiO6八面体的相互作用发生变化,部分拉曼特征峰发生漂移. 相似文献
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掺质KTP型晶体生长与性能研究 总被引:6,自引:1,他引:5
采用高温溶液法生长了含掺质离子Zr4+,Ga3+的单掺和双掺系列KTP型晶体.晶体生长过程中发现Ga掺入溶液后,体系更加稳定,容易生长出光学质量的晶体;而Zr掺入溶液后体系稳定性降低,晶体生长较困难.用等离子体发射光谱测定了各掺质离子在晶体中的含量,计算出掺质离子的分配系数,发现生长体系中Ga无论是在高掺入量还是低掺入量的情况下,Ga在晶体中的含量都十分稳定.测定了晶体的晶胞参数、紫外-可见-红外吸收光谱,测定的结果发现,晶胞参数均变化不大,在吸收光谱中Ga:KTP在可见光谱区有少量的光吸收,而Zr:KTP晶体是无色透明的.通过粉末倍频实验发现,Zr的掺入有助于晶体倍频转换效率的提高.通过晶体c轴向离子电导率的测试发现,Ga的掺入使c轴向电导率降低了大约3个数量级.双掺Zr和Ga的晶体是性能更为优良的掺质KTP型晶体. 相似文献
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氟代硼鈹酸钾KBe2BO3F2(KBBF)晶体是至今发现的可相位匹配的倍频波长最短的晶体.但是,由于该晶体具有很大的面间距,层状生长习性十分明显,因此,至今采用熔盐法生长的晶体厚度较薄,无法按照相位匹配方向切割成倍频器件.我们尝试了采用水热法生长KBBF晶体并获得了成功.我们采用水热法已成功地生长出了厚度达10 mm以上的透明单晶体.本文概述了水热法生长KBBF晶体的实验方法和生长条件(如矿化剂种类,温度,压力,温度梯度,充满度,开孔率等)对晶体生长的影响.最后,用负离子配位多面体生长基元理论模型讨论了晶体的生长机制与形状. 相似文献
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Synthesis,growth, morphology and characterization of ferroelectric glycine phosphite single crystals
Glycine phosphite (NH3CH2COO.H3PO3), a potential ferroelectric material, was grown as single crystals from aqueous solutions by slow evaporation and slow cooling methods. Laboratory synthesized title compound was purified by recrystallization method and confirmed by Fourier transform infrared and Laser Raman studies. Temperature dependent solubility in double distilled water in the range between 288 and 328 K was determined by gravimetric method. Morphological importance of various growth faces were studied by optical goniometry. Powder x‐ray diffraction study performed on the grown crystals confirms the crystal system and lattice parameters of the unit cell. Optical transparency of the grown crystals in the ultraviolet–visible ‐near infrared region was studied by spectroscopic method. Thermal stability of the grown crystals in the temperature region above ambient until melting was studied using differential scanning calorimetry. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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双掺离子在KTNNP晶体生长中的协同效应研究 总被引:3,自引:2,他引:1
本文采用高温溶液法生长了不同掺质浓度的较大尺寸掺Nd3+和Nb5+KTP(KTNNP)晶体,以X射线单晶衍射仪测定了所生长晶体的晶胞参数,以等离子发射光谱(ICP-AES)法系统测定了晶体中的掺质浓度。实验结果显示,掺Nd3+和Nb5+后,KTP晶体生长习性和形态发生了很大的变化,而且体系中Nd3+的分配系数明显增大,并随Nb5+浓度的增大而增大,从而体现了Nb5+对Nd3+的协同效应。另外,掺质后,晶体的单胞体积一般略有增大,但未呈现出规律性。 相似文献
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KTP晶体的电光研究进展 总被引:11,自引:6,他引:5
本文简述了KTP晶体的电光性能并与KD*P、LN晶体进行了比较。概括了KTP晶体电光器件研究的主要进展。对水热法生长的KTP晶体和熔剂法生长的KTP晶体在电光应用中的优缺点进行了分析。最后介绍了熔剂法生长的低电导率KTP晶体在电光领域的应用研究。 相似文献
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Z. H. Sun D. Xu X. Q. Wang X. J. Liu G. Yu G. H. Zhang L.Y. Zhu H. L. Fan 《Crystal Research and Technology》2007,42(8):812-816
Single crystal growth of the organic nonlinear optical crystal, L‐arginine trifluoroacetate (L‐Arg·CF3COOH, abbreviated as LATF) is reported. Low temperature solution growth method is employed for the growth of bulk single crystals. The cell parameters are verified by single crystal diffraction. Fourier transform infrared (FT‐IR) and Fourier transform Raman analysis are used to confirm the presence of various functional groups in the grown crystal. The thermal properties of the grown crystals are studied by thermogravimetric analysis and differential scanning calorinetry analysis (TGA/DSC). Second harmonic generation (SHG) measurement confirms the NLO properties of the grown crystal. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Tianye Lu Zhanggui Hu Xiaomao Li Yinchao Yue Xuesong Yu Zhenxiong Wu 《Crystal Research and Technology》2012,47(8):882-887
Using the solution‐reacted materials, potassium titanyl phosphate (KTiOPO4, KTP) crystal was grown by the top‐seeded solution growth (TSSG) method. The solution‐reacted precursor was characterized by scanning electron microscope, and the solubility of KTP in K8P6O19 was measured. The crystals were investigated by synchrotron radiation X‐ray topography, scattering centers measurement, weak absorption test and damage threshold test. The results showed that dispersion was better and solubility was higher than those by solid‐reacted method. Compared with the conventional crystal, KTP crystal grown from the solution‐reacted precursor had fewer defects, fewer scattering centers, lower weak absorption and higher damage threshold. 相似文献
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Wang Jiyang Liu Yaogang Wei Jingqian Jiang Minghua Shao Zongshu Liu Wenjun Jiang Shusheng 《Crystal Research and Technology》1997,32(2):319-327
A series of niobium doped KTP (Nb: KTP) crystals has been grown. XRD and DTA experiments show that the Nb: KTP crystal structures do not differ from that of KTP (within experimental error) and that the melting points of the crystals increase with increasing Nb content. Synchrotron radiation topography revealed that the main defects of the crystals were growth sector boundaries, growth striations, inclusions and dislocations. Second harmonic generation experiments were performed using a 12.2% Nb:KTP and the d15 and d24 values of csystal were determined to be (3.7 ± 0.4) and (8.3 ± 0.8) × 10−9 esu, respectively. The relationship between phase-matching angle and Nb content for a 1.064 μm laser was determined and in the case of a 4.0% Nb:KTP crystal, non-critical phase matching was realized. 相似文献