目录
摘要Ⅱ
关键词Ⅱ
AbstractⅢ
引言
引言1
1 材料与方法4
1.1 试剂准备4
1.1.1 实验仪器4
1.2 实验方法4
1.2.1 实验步骤5
1.3 分析方法5
1.3.1 X射线衍射5
1.3.2 红外光谱法与紫外可见光吸收光谱法5
1.3.3 热重分析法6
2 实验过程7
3 分析与结论8
3.1 结构分析10
3.2 热重分析11
3.3 光学测量11
3.4 合成方法分析12
3.5 结论13
致谢14
参考文献15
稀土非线性光学晶体材料的设计合成与结构研究
摘 要
本次毕业设计的主要研究内容为通过选用部分光学性质良好的稀土元素与碘酸根、无机盐等，利用水热合成法，合成新型非线性光学晶体材料，并探究其光学性质，实验过程中，通过对反映时间，反应温度、稀土元素的调节，以期合成性质良好的非线性光学晶体材料。最终，通过探索得到，将AgNO3(0.050 g, 0.30 mmol), In2O3(0.028 g, 0.10 mmol), I2O5(0.835 g, 2.5 mmol)和6% HNO3(2 mL)混合放入含23 mL四氟乙烯内衬的高压釜中，在6h内加热至230℃保温4天，然后以3ºC/h的速度冷却至30ºC，所得的产物过滤，并以去离子水洗涤，最终得到了Ag3In(IO3)6单晶，通过EDS元素分析得到，晶体中元素平均摩尔比为Ag：In：I为2.9：1.0：6.3，与单晶X射线结构分析结果吻合较好。对产物进行热重分析，发现该晶体热稳定温度约为180℃，且180540℃显示了一个失重步骤，在540℃总失重率达到50.12％，与计算结果49.36％非常接近。另外，其光学漫反射光谱表明，此晶体是光学键隙为3.75 eV的宽禁带半导体。
DESIGN, SYNTHESIS AND STRUCTURE OF RARE EAR *51今日免费论文网|www.51jrft.com +Q: ^351916072# 
TH NONLINEAR OPTICAL CRYSTAL MATERIALS
ABSTRACT
The main research content of this graduation project is to select some rareearth elements with good optical properties, iodate, inorganic salts, etc., and use hydrothermal synthesis to synthesize new nonlinear optical crystal materials and explore their optical properties. During the experiment, Through the adjustment of reaction time, reaction temperature and rare earth elements, we hope to synthesize nonlinear optical crystal materials with good properties. Finally, through exploration, AgNO3 (0.050 g, 0.30 mmol), In2O3 (0.028 g, 0.10 mmol), I2O5 (0.835 g, 2.5 mmol) and 6% HNO3 (2 mL) were mixed into 23 mL tetrafluoroethylene In the lined autoclave, it was heated to 230℃ for 4 days in 6 hours, and then cooled to 30℃ at a rate of 3℃/ h. The resulting product was filtered and washed with deionized water to finally obtain Ag3In (IO3)6 crystal, According to EDS elemental analysis, the average molar ratio of elements in the crystal Ag: In: I is 2.9: 1.0: 6.3, which is in good agreement with the single crystal Xray structure analysis results. Thermogravimetric analysis of the product revealed that the thermal stability temperature of the crystal was about 180℃, and 180540℃ showed a weightlessness step. The total weight loss rate at 540℃ reached 50.12%, very close to the calculated result of 49.36%. In addition, its optical diffuse reflectance spectrum indicates that the crystal is a wide band gap semiconductor with an optical bond gap of 3.75 eV.

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