Abstract KTiOPO4 nanoparticles were synthesized by the hydrothermal method. The effects of solution pH on size, its distribution, structural, optical, dielectric, and morphological properties of products were investigated. The obtained nanoparticles were characterized by XRD, FT-IR, FE-SEM, TEM, UV–Vis analyses, and LCR measurement. The pH of the solution varied from 3.5 to 7.00. Only solution pH equal to 4.5 and 5.5 resulted in pure KTP nanoparticles. Smallest and biggest grain sizes were found to be 27.72 nm and 92.4 nm, respectively. Obtained KTP nanoparticles at pH = 5.5 showed the dielectric constant (1.68 × 104) with 3.36 times higher than that value for KTP single crystal (0.5 × 104). The best structural quality and the best optical properties were observed in this solution pH. Solution pH variation resulted in crystal lattice rotation of obtained KTP nanoparticles.

中文翻译：

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溶液pH值对水热法合成KTiOPO4(KTP)纳米粒子结构、光学和电学性能的影响

摘要 采用水热法合成了KTiOPO4纳米颗粒。研究了溶液 pH 值对产品尺寸、分布、结构、光学、介电和形态特性的影响。所得纳米颗粒通过 XRD、FT-IR、FE-SEM、TEM、UV-Vis 分析和 LCR 测量进行表征。溶液的 pH 值在 3.5 到 7.00 之间变化。只有溶液 pH 值等于 4.5 和 5.5 才能产生纯 KTP 纳米颗粒。发现最小和最大晶粒尺寸分别为 27.72 nm 和 92.4 nm。在 pH = 5.5 下获得的 KTP 纳米粒子显示出介电常数 (1.68 × 104) 比 KTP 单晶 (0.5 × 104) 值高 3.36 倍。在该溶液 pH 值中观察到最佳结构质量和最佳光学性能。