The sources of charge carriers in samples were \( \right)\). The thermal dependence of DC conductivity demonstrates Arrhenius type transport with one, two, and three regions of conduction in sample ZF-0, ZF-2, and ZF-4 respectively. The presence of interfacial and orientational polarization was indicated by dielectric constant and dissipation factor studies, which ranged from (0.7–460) to (0.3–0.8) with Mn and were found thermally stable up to 300 ☌. The dielectric characteristics of samples were examined as a function of temperature (60–600 ☌) at various frequencies (1 kHz, 10 kHz, 100 kHz, and 1 MHz). The optical bandgap of the samples suggested that they were semiconducting. The surface charge and morphology of the samples were studied using zeta potential and scanning electron microscope analysis, respectively.
W–H and SSP plots were used to determine the crystallite size and micro-strain of samples. X-Ray powder diffraction and Raman spectrum analysis were used to determine the preliminary phase of obtained samples. The system Zn1-xMnxFe2O4 (x = 0, 2, and 4%) was prepared by sol–gel chemical route at 80 ☌. Based on present study, the present material can be potentially used in semiconductor devices, UV-detector, and mixed ionic and electronic conductor (MIECs) by utilizing absorption states and thermo-curves as metastable state. The impedance spectroscopy studies reflect the major contribution of grain in the conduction and relaxation process of all sample. Ghosh scaling applied to σac of all temperatures found to superimpose on a single master curve, indicates the invariance of conduction mechanism.
Further, the thermal dependence of dc conductivity (σdc) and hopping frequency (fh), indicating the presence of Arrhenius type charge transport in the samples. The AC conductivity spectra of single-phase samples follow universal Jonscher's power law σac=σdc(1+(ffh)n). The solubility limit of La at Ba-site has reconfirmed using FTIR and Raman analysis. The preliminary phase of samples has analyzed using XRD and found to be crystallized into tetragonal structure up to 4 atoms %. If you would like to support YCAL’s efforts through financial means, or through volunteering resources to help implement any of the programs listed above, please visit the Support YCAL page on our website.A few compositions of (Ba1-xLax)2SnO4 with 0≤x≤0.10 have prepared via solid-state ceramic route followed by calcination at 1000 ☌ for 8 h. YCAL continues to grow and seek out new opportunities to connect Education and Business to engage students. In January, YCAL announces the recipients of Innovation Grants to help fund innovative career exploration and awareness projects, the Career Education and Work Standards Symposium to provide sample lessons and other resources to assist in the inclusion of career education in curriculum, and Educator in the Workplace, which gives educators the opportunity to learn more about the current business and employment environment and to experience business operations first-hand. YCAL added two additional Pre-Apprenticeship Programs in Manufacturing and Electrical in the following two years and continues to track job trends and opportunities to help provide opportunities to students while addressing the needs of the local workforce.įor Educators, YCAL provides several programs that assist in providing educators with career education resources to impact their students.
This program was designed to provide High School Seniors with the opportunity to build skills and explore if the pursuit of a Registered Apprenticeship is in their Post-Graduation Career Plan. For more information on these programs, please click on their names to be taken to their informational pages. In 2017-2018, YCAL launched its first Pre-Apprenticeship Program, in partnership with the Kinsley Education Center, focusing on Construction. The mission of YCAL is to connect educators and employers to engage students in career education and development.įor Students, YCAL provides direct impact through the Career Education Readiness Workshop held in March, and the catalog of approximately 40 different Career Exploration Programs which are offered at different times throughout the school year. The York County Alliance for Learning (YCAL) is a 501(c)(3) intermediary organization that works with businesses and schools to provide career education, relevant academic experiences, and work based learning to York County students.
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