<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1405-7743</journal-id>
<journal-title><![CDATA[Ingeniería, investigación y tecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. invest. y tecnol.]]></abbrev-journal-title>
<issn>1405-7743</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Ingeniería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-77432016000300309</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Obtención de polvos cerámicos representativos del sistema Pr/Sr-Mn-O utilizando el método de precursor polimérico (Pechini)]]></article-title>
<article-title xml:lang="en"><![CDATA[Obtaining of Representative Ceramic Powders of the Pr/Sr-Mn-O System Using the Method of Polymer Precursor (Pechini)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Paza]]></surname>
<given-names><![CDATA[Carol Julieth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Muñoza]]></surname>
<given-names><![CDATA[Yasser Halil]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gaona-Jurado]]></surname>
<given-names><![CDATA[Sonia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Páez]]></surname>
<given-names><![CDATA[Jorge Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Cauca Departamento de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Cauca Departamento de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Cauca Departamento de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad del Cauca Departamento de Física ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>17</volume>
<numero>3</numero>
<fpage>309</fpage>
<lpage>316</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-77432016000300309&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-77432016000300309&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-77432016000300309&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Los óxidos de manganeso, conocidos como manganitas, es uno de los sistemas de la materia condensada de mayor interés actual. Estos materiales presentan transiciones magnéticas y eléctricas tales como ferromagnética-paramagnética y conductor-aislante. El estudio de sus propiedades, en particular la magnetorresistencia gigante, es de gran interés por sus importantes aplicaciones. En este trabajo se obtuvieron polvos cerámicos del sistema Pr/Sr-Mn-O por el método de precursor polimérico (Pechini) usando como precursores el cloruro de manganeso y los acetatos de praseodimio y estroncio. Los principales objetivos del proyecto optimizaron los diferentes parámetros de síntesis, colocándole especial atención al contenido de estroncio, y determinar el efecto del método de síntesis sobre las características del polvo obtenido. El método de síntesis utilizado permitió obtener a baja temperatura, partículas micrométricas del sistema PrxSr1-xMnO3 con alta pureza química, bien cristalizadas. Las condiciones más adecuadas para obtener los polvos de PrxSr1-xMnO3 fueron: solución inicial a pH 8, calentamiento de esta solución a 140 °C y calcinación de la resina a 250 °C, por 24 horas. El óxido mixto se obtuvo tratando el polvo calcinado a 600 °C, durante 2 horas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Manganese oxides, known as manganites, are one of the systems of condensed matter of current major interest. These materials show magnetic and electrical transitions such as ferromagnetic-paramagnetic and conductor-insulator. The study of their properties, in particular giant magnetoresistance, is of great interest for their important applications. In this work ceramic powders of the Pr/Sr-Mn-O system were obtained by the polymer precursor method (Pechini) using manganese chloride and praseodymium and strontium acetates as precursors. The principal objectives of the project were those of optimizing the different parameters of synthesis, placing special attention on the content of strontium, and determining the effect of the method of synthesis on the characteristics of the powder obtained. The method of synthesis used allowed obtained, at a low temperature, micron particles of the PrxSr1-xMnO3 system, with a high chemical purity, well crystallized. The conditions most suitable for obtaining the powders of PrxSr1-xMnO3 were: initial solution at pH 8, heating of this solution to 140 °C and calcining of the resin at 250 °C, for 24 hours. The mixed oxide was obtained treating the calcined powder at 600 °C, for 2 hours.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[manganitas]]></kwd>
<kwd lng="es"><![CDATA[métodos de síntesis]]></kwd>
<kwd lng="es"><![CDATA[método de precursor polimérico]]></kwd>
<kwd lng="es"><![CDATA[caracterización]]></kwd>
<kwd lng="en"><![CDATA[manganites]]></kwd>
<kwd lng="en"><![CDATA[synthesis method]]></kwd>
<kwd lng="en"><![CDATA[polymeric precursor method]]></kwd>
<kwd lng="en"><![CDATA[characterization]]></kwd>
</kwd-group>
</article-meta>
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