Synthesis, structural, optical, thermal and mechanical properties of dipotassium tetra borate monohydrate single crystal

• Published in: Journal of materials science. Materials in electronics 2022-07, Vol.33 (21), p.17023-17035
• Main Authors: Dhatchaiyini, M. K., Vinothkumar, P., Suresh, A. Antony, Mohapatra, Manoj, Shalini, D., Murugasen, Priya
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal growth; Cut off wavelength; Defocusing; Functional groups; Laser damage; Materials Science; Mechanical properties; Optical and Electronic Materials; Optical properties; Photoconductivity; Single crystals; Thermal stability; Thermodynamic properties; Triclinic crystals; Yield point
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08580-4

A transparent optically good quality dipotassium tetra borate monohydrate single crystal of 9 mm × 8 mm × 8 mm was successfully grown by slow evaporation technique. S-XRD study revealed that the crystal belongs to the triclinic crystal system with P 1 ¯ space group. The vibration levels of the functional groups present in the DKTBMH compound were determined using FT-IR and FT-Raman spectral analyses. The UV–Vis-NIR spectrum confirms that the grown crystal may be well constructive material for optical windows application. The lower cut-off wavelength of the crystal was found to be 231 nm. The DKTBMH crystal was thermally stable upto 150 °C. The specific heat capacity of DKTBMH crystal was measured. The laser damage threshold value for DKTBMH was measured to be 8.6 GW/cm 2 at 1064 nm. The mechanical studies confirmed that DKTBMH crystal belongs to the soft material category. The negative photoconductivity of DKTBMH crystal is confirmed by photoconductivity studies. Third-order susceptibility, second-order hyperpolarizability, and FOM were determined from Z-scan measurements. The observed results confirm that DKTBMH crystal exhibits self-defocusing nature and two-photonn absorption.