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首页> 外文期刊>Indian Journal of Physics >Growth, microhardness, dielectric and photoconductivity characterization of a highly polarizable NLO material: Sodium p-nitrophenolate dihydrate (NO2-C6H4-ONa.2H2O)
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Growth, microhardness, dielectric and photoconductivity characterization of a highly polarizable NLO material: Sodium p-nitrophenolate dihydrate (NO2-C6H4-ONa.2H2O)

机译：高极化NLO材料的生长，显微硬度，介电和光电导特性：对硝基酚钠二水合物（NO 2 -C 6 H 4 - ONa.2H 2 O）

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摘要

Sodium p-nitrophenolate dihydrate (NPNa.2H2O) is a highly polarisable non linear optical material. It has a deff about 1.45 times than that of potassium titanyl phosphate. Single crystals of (NPNa.2H2O) have been grown successfully by slow solvent evaporation having water and methanol as solvent. The structure of the crystal is verified by single X-ray analysis. Optical absorption shows that the crystal is highly transparent between 1500 and 300 nm. Microhardness of the crystal is found to increases with increase in load and the hardness number is found to be high for methanol grown crystal as compared to the water grown crystal. Electrical conductivity as evaluated from the cole-cole plot is found to be 1.26 × 10−5 mho m−1. The dielectric constant of the crystal is low and independent at higher frequencies. The crystal has prominent photoconduction in the presence of trap energy levels formed by the Na+ ions. The SHG efficiency of the crystal is studied by performing Kurtz powder test and the results of scanning electron microscope analysis indicate that the major part of the crystal surface is free from inclusion and dislocation. Keywords NLO crystal - optical absorption - microhardness - dielectric response - DC photoconductivity
机译：对硝基苯酚钠二水合物（NPNa.2H 2 O）是一种高度可极化的非线性光学材料。它的d eff 约为钛氧钛磷酸钾的d eff 。 （NPNa.2H 2 O）单晶已通过以水和甲醇为溶剂的缓慢溶剂蒸发而成功生长。晶体的结构通过单X射线分析验证。光学吸收表明该晶体在1500至300 nm之间是高度透明的。发现晶体的显微硬度随负载的增加而增加，并且发现与水生长的晶体相比，甲醇生长的晶体的硬度值高。由油菜油菜图测得的电导率为1.26×10 -5 mho m -1 。晶体的介电​​常数很低，并且在较高频率下是独立的。在Na + 离子形成的陷阱能级存在下，晶体具有显着的光电导性。通过进行Kurtz粉末试验研究了晶体的SHG效率，扫描电子显微镜分析的结果表明晶体的主要部分没有夹杂和位错。关键词NLO晶体-光吸收-显微硬度-介电响应-直流光电导

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