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<p>Interest in borate crystals has increased over the last four decades due to their possible applications in various fields such as deep UV laser technology. Ammonium Penta Borate (APB) is one such excellent crystal in the borate series and has been chosen for the present research work with Aluminium Chloride as the dopant (APB⋅AlCl<sub>3</sub>). The conventional slow evaporation technique has been employed for the synthesis work. The crystalline nature was strongly illustrated by sharp peaks of the powder XRD pattern. The single-crystal XRD has been carried out on APB⋅AlCl<sub>3</sub> crystal and confirmed the existence of monoclinic system associated with the space group P2<sub>1</sub>/C. The presence of various functional groups such as B–O and N–H has been identified by using FTIR spectral analysis. The optical properties of the test material have been examined and found that the title compound shows high transmission in the entire visible region with optical band gap 5.17&#xa0;eV and the UV lower cutoff wavelength at 263 nm and an upper cutoff wavelength 362 nm. In the present investigation, the melting point of the grown APB⋅AlCl<sub>3</sub> crystal is noted at 154&#xa0;°C, and the decomposition stages experienced by the harvested crystal were discussed.</p>

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Synthesis and characterization of ammonium penta borate crystal doped with aluminium chloride

  • 期刊论文

  • 发表日期：

    2026年2月13日

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  • G. S. Dhanu Sree,
  • C. Besky Job

摘要

Interest in borate crystals has increased over the last four decades due to their possible applications in various fields such as deep UV laser technology. Ammonium Penta Borate (APB) is one such excellent crystal in the borate series and has been chosen for the present research work with Aluminium Chloride as the dopant (APB⋅AlCl3). The conventional slow evaporation technique has been employed for the synthesis work. The crystalline nature was strongly illustrated by sharp peaks of the powder XRD pattern. The single-crystal XRD has been carried out on APB⋅AlCl3 crystal and confirmed the existence of monoclinic system associated with the space group P21/C. The presence of various functional groups such as B–O and N–H has been identified by using FTIR spectral analysis. The optical properties of the test material have been examined and found that the title compound shows high transmission in the entire visible region with optical band gap 5.17 eV and the UV lower cutoff wavelength at 263 nm and an upper cutoff wavelength 362 nm. In the present investigation, the melting point of the grown APB⋅AlCl3 crystal is noted at 154 °C, and the decomposition stages experienced by the harvested crystal were discussed.