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    Synthesis, phase confirmation and electrical properties of (1 ? x)KNNS?xBNZSH lead-free ceramics
    (Springer, 2022-02-02T00:00:00) Kumar, Amit; Kumari, Sapna; Kumar, V.; Kumar, Prashant; Thakur, Vikas N.; Kumar, Ashok; Goyal, P.K.; Arya, Anil; Sharma, A.L.
    In the present work, lead-free piezoelectric ceramics (Rx)(K0.5Na0.5)(Nb0.96Sb0.04O3)?x(Bi0.5Na0.5)(Zr0.8Sn0.1Hf0.1)O3 [abb. as (Rx)KNNS?xBNZSH, 0 ? x ? 0.04] were prepared via solid-state sintering technique. The thermal behavior of mixed powders has been investigated for x = 0, 0.02, and 0.04 using TGA-DSC analysis to estimate the calcination temperature. The structural, morphological, dielectric, ferroelectric and piezoelectric properties are analyzed through the appropriate characterization techniques. The X-ray diffraction (XRD) patterns demonstrate a pure perovskite phase structure for all the sintered samples. Further, the coexistence of rhombohedral to orthorhombic (R-O) phase is observed in ceramic sample with x = 0.02. The morphology of all the sintered samples exhibits an inhomogeneous, dense microstructure with the rectangular grain, while for x = 0.02, a relatively homogeneous distribution of grains is observed. BNZSH doping decreases the average grain size from 2.22 to 0.33�?m for x = 0 to x = 0.04, respectively. Owing to the presence of multiple-phase coexistence as well as the improved microstructure and enhanced dielectric properties (dielectric constant ?r = 1080, ?max = 5301; Curie temperature - TC ~ 317��C; dielectric loss - tan? ~ 6%) the ceramics with x = 0.02 has been found to have a large piezoelectric coefficient (d33) of ~180 pC/N, remnant polarization (Pr) ~ 16.7 �C/cm2 and coercive field (Ec) ~ 10.7�kV/cm. We believe it will expand the range of applications for KNN-based ceramics. � 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
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    Growth, characterizations, and the structural elucidation of diethyl-2-(3-oxoiso-1,3-dihydrobenzofuran-1-ylidene)malonate crystalline specimen for dielectric and electronic filters, thermal, optical, mechanical, and biomedical applications using conventional experimental and theoretical practices
    (Springer, 2021-08-18T00:00:00) Rajkumar, M.; Maalmarugan, J.; Flora, G.; Surendarnath, S.; Christy, S.; Periyathambi, P.; Kumar, Shashank; Patel, R.P.; Lobo, F. Dayana; Singh, Atul Kumar; Vimalan, M.; SenthilKannan, K.
    The single crystals of diethyl-2-(3-oxoiso-1,3-dihydrobenzofuran-1-ylidene) malonate (D23DYM) were grown successfully and efficiently by the standard slow evaporation method. The lattice cell parameters by XRD analysis also confirmed that the crystal system is Triclinic with the space group of P?. The FTIR spectrum portrays the presence of major and active functional groups in D23DYM. The thermal studies explained the two major weight losses between 107 and 153��C and 153 and 800��C for D23DYM have been observed. It is very clear that the hardness profile of D23DYM increases with increase in load which confirms reverse indentation size effect (RISE), and the work-hardening coefficient 'n' was observed as 2.936. The negative photoconductive nature as the predominant property and the dielectric constant and dielectric loss are perfectly and accurately measured and properly reported. The structural properties by theoretical manner confirm the elucidation as well as the confirmation for XRD data and the computational way of identifying the lattice bond length and bond angles using software. Diabetes mellitus is the commonly occurring disease associated with lifestyle and feeding behavior of D23DYM�organic crystals are tested by the use of molecular docking. The binding affinity values for the standard inhibitor A74DME and investigational compound D23DYM were ? 8.1�kJ/mole and ? 8.3�kJ/mole, respectively, and in future may get proceeded for in vivo animal analysis as well as anti-cancer work as the benzofuran is present in the crystal and is better diabetic- and cancer-opposing agent. � 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.