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These high chemical and thermal stability glasses are good candidates for several applications such as fast ionic conductors, semiconductors, photonic materials, electrolytes, hermetic seals, rare-earth ion host solid lasers, and biomedical materials. The present work endorses the analysis of the electrical conductivity of the as-grown samples, and also the electrical, dielectric, and structural changes established by the heat-treatment process. The structure of the samples was analyzed using X-Ray powder Diffraction (XRD), Raman spectroscopy, and density measurements. Both XRD and Raman analysis confirmed crystals formation through the heat-treatment process. The electrical ac and dc conductivities, \u03c3ac and \u03c3dc, respectively, and impedance spectroscopy measurements as function of the temperature, varying from 200 to 380\u2009K, were investigated for the as-grown and heat-treated samples. The impedance spectroscopy was measured in the frequency range of 100\u2009Hz\u20131 MHz.<\/jats:p>","DOI":"10.1063\/1.4958935","type":"journal-article","created":{"date-parts":[[2016,7,18]],"date-time":"2016-07-18T17:00:23Z","timestamp":1468861223000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":15,"title":["Study of structural, electrical, and dielectric properties of phosphate-borate glasses and glass-ceramics"],"prefix":"10.1063","volume":"120","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6436-7376","authenticated-orcid":false,"given":"B. M. G.","family":"Melo","sequence":"first","affiliation":[{"name":"Aveiro University 1 Physics Department (I3N), , Campus Universit\u00e1rio de Santiago, Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6858-9507","authenticated-orcid":false,"given":"M. P. 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