Effect of shock waves on structural and dielectric properties of ammonium dihydrogen phosphate crystal

Abstract

In this research article, the authors pay attention to investigate the effect of structural and dielectric properties of ammonium dihydrogen phosphate (ADP) crystal under pre and post shock loaded conditions. A shock wave of Mach number 1.9 was utilized for the present investigation which was generated by a table-top pressure driven shock tube. The crystalline nature and grain size variations were estimated by powder X-ray diffraction technique. The grain size of post shock wave loaded ADP crystal is found to be larger than that of the pre shock wave loaded ADP crystal. The dielectric properties of the pre and post shock loaded crystals were analyzed by impedance analyzer as a function of frequency (1 kHz–1 MHz) at ambient temperature. The dielectric constant is observed to be varying from 346 to 362 at the frequency of 400 kHz for pre and post shock wave loaded ADP crystals, respectively. The obtained results suggest that shock waves can be an alternate tool to tailor the physical properties of materials without creating any change in the original crystal system and surface morphology.

Rapid enhancement of optical transparency on glycine phosphite crystals by shock waves

“…During this short period, the grains inside the material will melt and recrystallize again. During the recrystallization process, the concentration of defects can be reduced and small grains can fuse together to form larger grains and vice versa 37 . In the present study, the increase in grain size and reduction of defects improved the crystalline quality, which caused the appearance of a second-order diffraction peak.…”

“…During the recrystallization process, the concentration of defects can be reduced and small grains can fuse together to form larger grains and vice versa. 37 In the present study, the increase in grain size and reduction of defects improved the crystalline quality, which caused the appearance of a second-order diffraction peak. Also, the peak width of (001) has been reduced under shocked conditions, which shows the enhancement of crystallinity for the crystal.…”

Impact Of Shock Waves on Structural and Optical Properties of Li2so4.H2o Doped L-Alanine Single Crystals for High Pressure and Temperature Applications

“…5. The (120) plane and the twin peak is converted as a single diffraction peak and resulting in the net degree of crystallinity is increased compared than that of the control crystal and similar results have been found in the pyramidal face ADP crystal [45].The degree of crystallinity is linked as a consequence of active recrystallisation at the time of shockwave propagation. On account of this process, the internal grain boundary density is reduced and thus, the grain size is increased [46].…”

“…Prime structural parameters like micro-strain and dislocation density are remarkably diminished. Precursor of examining crystal is an organic material on which existence of hydrogen bonds played a crucial act in active re-crystallisation at the time of shockwave propagation, low energy of hydrogen bonds are freely disposed of by shock wave [45]. Structurally stable crystals are highly demanded in industrial applications and device fabrication such as moving and vibrating devices and especially for space vehicles [48].…”