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Dielectric and Electromechanical Properties of Zr-Doped BNT-ST Lead-Free Piezoelectric Ceramics
Amir Ullah,Mateen Ullah,Aman Ullah,A. V. Trukhanov,Ghulam Saddiq,Burhan Ullah,Aurang Zeb,Saeed Ullah Jan,김일원 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.6
0.72(Bi$_{0.5}$Na$_{0.5}$)Ti$_{(1-x)}$Zr$_x$O$_3$-0.28SrTiO$_3$ (BNTZ-ST) with $x$ = 0.00, 0.01, 0.02 and 0.03 were produced using a solid solution reaction procedure. Results from the X-ray diffraction (XRD) analysis showed the presence of a perovskite structure with cubic symmetry for all samples. Surface analysis was completed using field emission scanning electron microscopy (FE-SEM), and the grain size was found to decrease slightly with increasing Zr doping. The grain morphology was primarily rectangular, but morphed into a rounder shape with increases in Zr. In a dielectric constant study, the depolarization temperature was found to decrease with increasing Zr$^{+4}$ content and increasing frequency. The strain was found to be 0.34\% for the undoped samples with an equivalent dynamic strain ($S_{max}/E_{max}$) of 618 pm/V, without negative strain. However, the strain decreased slightly and hysteresis loops become slim and more symmetric, attaining a relaxor ferroelectric behavior with increasing Zr content.
Burhan Ullah,Aurangzeb Khan,Muhammad Fahad,Mahmood Alam,Allah Noor,Umar Saleem,Muhammad Kamran 한국정보처리학회 2022 Journal of information processing systems Vol.18 No.3
The capability to examine an X-ray image is so far a challenging task. In this work, we suggest a practical andnovel algorithm based on image fusion to inspect the issues such as background noise, blurriness, or sharpness,which curbs the quality of dual-energy X-ray images. The current technology exercised for the examination ofbags and baggage is “X-ray”; however, the results of the incumbent technology used show blurred and lowcontrast level images. This paper aims to improve the quality of X-ray images for a clearer vision of illegitimateor volatile substances. A dataset of 40 images was taken for the experiment, but for clarity, the results of only13 images have been shown. The results were evaluated using MSE and PSNR metrics, where the averagePSNR value of the proposed system compared to single X-ray images was increased by 19.3%, and the MSEvalue decreased by 17.3%. The results show that the proposed framework will help discern threats and theentire scanning process.