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NHHS|http://www.sjpub.org/joinreviewers.html NHHS|http://www.sjpub.org/sitemap.html vti_cachedneedsrewrite:BR|false vti_cachedhasbots:BR|false vti_cachedhastheme:BR|false vti_cachedhasborder:BR|false vti_metatags:VR|HTTP-EQUIV=Content-Type text/html;\\ charset=iso-8859-1 citation_author Boyo,\\ A.O\\ citation_author Akomolafe\\ .T citation_title Temperature\\ Coefficient\\ Resistance\\ and\\ Microstructural\\ Analyses\\ of\\ Iron-clay\\ Based\\ Composite\\ Resistors citation_pdf_url http://www.sjpub.org/sjp/sjp-283.pdf citation_year 2012 citation_online_date 2012 citation_journal_title Science\\ Journal\\ of\\ Physics citation_abstract Experimental\\ investigations\\ have\\ been\\ carried\\ out\\ to\\ study\\ the\\ variations\\ of\\ Microstructure\\ and\\ Temperature\\ Coefficient\\ Resistance\\ occurring\\ in\\ Fe-clay\\ based\\ composite\\ resistors.\\ The\\ resistors\\ were\\ produced\\ from\\ natural\\ materials\\ taken\\ from\\ Ibadan\\ ,\\ and\\ fabricated\\ by\\ a\\ compaction\\ method.\\ The\\ pressure\\ of\\ the\\ mould\\ =\\ 1.00\\ ±\\ 0.02\\ x\\ 107\\ N\\ /\\ m2.\\ The\\ resistors\\ have\\ a\\ constant\\ thickness\\ of\\ 3.5\\ mm\\ and\\ varying\\ lengths\\ ranging\\ from\\ 3.00\\ mm\\ to\\ 10.00\\ mm.\\ The\\ resistors\\ of\\ composition\\ 60\\ wt%Fe\\ to\\ 90\\ wt%Fe\\ were\\ subjected\\ to\\ varying\\ annealing\\ schedules,\\ (i.e.\\ varying\\ peak\\ firing\\ temperatures\\ ranging\\ from\\ 100\\ oC\\ to\\ 1000\\ oC\\ and\\ firing\\ times\\ from\\ 5\\ mins\\ to\\ 240\\ mins.\\ Most\\ of\\ the\\ resistors\\ fabricated\\ with\\ the\\ Ibadan\\ clays\\ have\\ negative\\ TCR\\ values.\\ Their\\ values\\ are\\ as\\ low\\ as\\ ±\\ 2\\ x\\ 10\\ ppm\\ /\\ oC\\ which\\ are\\ comparable\\ with\\ thermistors\\ and\\ other\\ standard\\ resistors.\\ Scanning\\ electron\\ microscope\\ model\\ 1990\\ at\\ IITA\\ Ibadan\\ was\\ use\\ to\\ do\\ the\\ analyses.\\ From\\ the\\ micrographs,\\ it\\ could\\ be\\ suggested\\ that\\ relevant\\ interactions\\ of\\ both\\ conductive\\ and\\ resistive\\ films\\ took\\ place,\\ which\\ in\\ turn\\ control\\ the\\ value\\ of\\ the\\ resistance\\ of\\ the\\ resistors. dc.rights http://creativecommons.org/licenses/by/3.0/ citation_volume 2012 citation_publisher Science\\ Journal\\ Publication citation_issn 2276-6367 citation_abstract_html_url http://www.sjpub.org/sjp/abstract/sjp-283.html vti_charset:SR|iso-8859-1