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Tecnología en Marcha
Article . 2022 . Peer-reviewed
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Tecnología en Marcha
Article . 2022
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Análisis cualitativo y cuantitativo de fosfatos de calcio por difracción de rayos-X mediante los métodos de Scherrer, Williamson-Hall y refinamiento de Rietveld

Authors: Alexánder Campos-Quirós; Kenneth Paniagua-Murillo; Gerardo Valladares-Castrillo; Jorge M. Cubero-Sesin; Luis Cordero-Arias;

Análisis cualitativo y cuantitativo de fosfatos de calcio por difracción de rayos-X mediante los métodos de Scherrer, Williamson-Hall y refinamiento de Rietveld

Abstract

Los fosfatos de calcio son materiales biocerámicos de gran importancia utilizados en el área de recubrimientos bioactivos para implantes metálicos. En el presente estudio, una muestra de fosfatos de calcio fue sintetizada mediante el método de precipitación química a partir de Ca(NO3)2 y (NH4)2HPO4. La técnica de difracción de rayos-X fue utilizada para realizar un análisis cualitativo y cuantitativo de las fases cristalinas presentes en el material mediante los métodos de Scherrer, Williamson-Hall y Rietveld. Se determinó que la muestra está constituida en un 75 % en masa de monetita (CaHPO4) y un 25 % en masa de brushita (CaHPO4.H2O), con tamaños promedio de cristalito en el orden submicrométrico. El análisis mediante microscopia electrónica de barrido muestra que las partículas se encuentran altamente aglomeradas, con un tamaño promedio de 2,8 ± 1 µm y morfología variada. El análisis elemental por espectroscopia de energía dispersiva de rayos-X reveló una relación molar calcio/fósforo (Ca/P) promedio de 0,95, lo cual concuerda con las fases cristalinas de monetita y brushita. Por último, la presencia de ambas fases se debe principalmente a los bajos niveles de pH durante la reacción y al secado de la muestra posterior al proceso de síntesis.

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Keywords

chemical precipitation, Technology, método de Rietveld, T, fosfato de calcio, Rietveld method, Fosfato de calcio, Método de Rietveld, calcium phosphate, Brushita, monetite, Brushite, precipitación química, monetita, Precipitación química, Monetita

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Average
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