Rahul K. Singh’s research while affiliated with Ranchi University and other places

Harnessing research and innovation to its utmost potential is essential to India's economic growth into a major player on the world stage. This study examines the critical roles that innovation and research play in India's economic growth. It explores the current state of research and innovation in India, including the obstacles faced, noteworthy successes, governmental efforts, and future directions. In order to promote sustained economic growth, societal development, and increased global competitiveness, this essay highlights the critical need of making significant investments in research and cultivating an inventive culture. With painstaking research and the lighting of case studies, it underlines how important it is to foster an atmosphere that supports creativity. By doing so, India can unleash its full potential, charting a course towards an economy that thrives on ingenuity, propels societal progress, and commands a prominent position on the global stage.

In this study, we investigated the impact of high-energy milling on the structural and dielectric properties of Pb[Zr(1-x)Tix ]O3 [PZT] ceramics synthesized using the solid-state reaction process. The sample was milled for 2, 4 & 6 hours using a high-energy ball milling machine. The unit cell structure for all of the samples was observed to be monoclinic, according to x-ray diffraction measurements (space group: C1m1). A significant reduction in crystallite size was observed, from 132 nm to 46 nm after 6 hours of milling. The dielectric study indicated a classical ferroelectric type behaviour for the un-milled sample and diffused phase transition for all milled samples. However dielectric constant dropped from 940 to 487 after 6 hours of milling.

In this article, the structural, microstructural, and dielectric properties of Lead- free perovskite ceramic Bi0.5(Na0.78K0.22)0.5TiO3 [BNKT] have been reported. The material was synthesized through the solid-state reaction method. The compound formed is found to have a hexagonal structure, confirmed by XRD analysis of the sample. The microstructural analysis of the compound revealed the polycrystalline nature of the ceramic having quasi-cubic grain morphology with distinct grain boundaries. From the dielectric study, it was found that the dielectric constant increases with temperature and attained maximum value at temperature Tc = 335° C, after which it decreased. The frequency independence of transition temperature (Tc) suggested the classic ferroelectric behaviour of the compound. The broad dielectric peak around transition temperature confirms the relaxor behaviour of the compound as well as diffused phase transition at Tc. The value of the relative permittivity and loss tangent at ambient temperature for 1kHz frequency is 627 and 0.223 respectively. The synthesized material can be utilized for the fabrication of capacitors and energy storage applications.

Because of their high stability, innocuous behaviour, outstanding electric properties and multi-functionality, lead-free double perovskites have emerged as a promising alternative to lead-based perovskites. We present here the structural, microstructural, dielectric and electrical properties of a newly synthesized double perovskite Nd2FeTiO6 (NFTO). The Rietveld refinement of its X-ray diffraction pattern revealed a monoclinic structure with space group P121/c1. The oxide exhibits a temperature-independent dielectric constant and di-electric loss at low temperatures (below 200 ?C) making the compound a suitable candidate for fabricating thermally stable capacitors. The AC conductivity was investigated using the Jonscher?s universal power law, and it was inferred that the conduction process is caused by the Correlated BarrierHopping (CBH) mechanism. Furthermore, frequency dependent AC conductivity also revealed the NTCR nature of the NFTO compound.