Abstract Large size and high quality KCl 1−x Br x mixed crystals [with x = 0.0 (pure KCl), 0.2, 0.4, 0.5, 0.6, 0.8 and 1.0 (pure KBr)] have been grown with suitable raw material proportion by the melt (Czochralski) method using the miscible alkali halides KCl and KBr. The grown crystals have been characterized by determining their density, refractive index, lattice constant, chemical composition, thermal parameters (Debye-Waller factor, Debye temperature and Debye frequency), optical absorption, micro hardness and electrical parameters (dielectric constant, dielectric loss factor, AC, and DC electrical conductivities and AC, and DC activation energies) through X-ray diffraction, optical, mechanical and electrical (both AC and DC at various temperatures in the range 30–150 °C) measurements. Results obtained in the present study indicate that mixing KCl with KBr leads to significant tuning of thermal, optical, mechanical and electrical properties without disturbing the crystal structure. The dielectric constant is found to increase several times due to mixing and KCl 0.5 Br 0.5 crystal has the maximum value.

中文翻译：

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KCl 1−x Br x 混合晶体的大尺寸晶体生长和结构、热、光学和电学特性

摘要 用合适的原料配比生长了大尺寸、高质量的 KCl 1−x Br x 混晶[x = 0.0 (纯 KCl), 0.2, 0.4, 0.5, 0.6, 0.8 和 1.0 (纯 KCl)]使用可混溶的碱金属卤化物 KCl 和 KBr 进行熔融（直拉）法。通过测定其密度、折射率、晶格常数、化学成分、热参数（德拜-沃勒系数、德拜温度和德拜频率）、光吸收、显微硬度和电学参数（介电常数、介电损耗因数）来表征生长的晶体、交流和直流电导率以及交流和直流活化能）通过 X 射线衍射、光学、机械和电气（交流和直流在 30-150 °C 范围内的各种温度下）测量。本研究中获得的结果表明，将 KCl 与 KBr 混合可在不干扰晶体结构的情况下显着调整热、光学、机械和电学性能。发现由于混合，介电常数增加了数倍，KCl 0.5 Br 0.5 晶体具有最大值。