Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data
Abstract Silica is a versatile material employed in different applications fields including aerospace, especially for rocket engines thermal protections. It is known that particles diameter causes variations in the material properties, and the best-known methods for diameter determination in general...
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Academia Brasileira de Ciências
2022-10-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000501706&tlng=en |
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| author | RACHEL F. MAGALHÃES ALEXANDRA H. DE BARROS MARCIA M. TAKEMATSU ALAN PASSERO MILTON F. DINIZ JAIRO SCIAMARELI RITA C.L. DUTRA |
| author_facet | RACHEL F. MAGALHÃES ALEXANDRA H. DE BARROS MARCIA M. TAKEMATSU ALAN PASSERO MILTON F. DINIZ JAIRO SCIAMARELI RITA C.L. DUTRA |
| author_sort | RACHEL F. MAGALHÃES |
| collection | DOAJ |
| description | Abstract Silica is a versatile material employed in different applications fields including aerospace, especially for rocket engines thermal protections. It is known that particles diameter causes variations in the material properties, and the best-known methods for diameter determination in general consist of several steps in sample preparation such as drying, sieving and the determination of the refractive index according different methods. On the other hand, Fourier transform infrared spectroscopy techniques (FT-IR), in reflectance mode, related to the particle size, are less used for this type of determination. Moreover, methodologies in the near infrared region (NIR) are even less explored. Therefore, the aim of this paper is to present a FTIR methodology for diffuse reflectance (DRIFT) in the middle infrared region (MIR) and reflectance analysis in near infrared region (NIRA) for the determination of the particle diameter on silica samples. Both methodologies showed good results. As proven by a test sample analysis, NIRA methodology indicated better precision. Furthermore, considering small and intermediated particle sizes, a tendency towards smaller errors for the absorbance measurements of the samples was found, consistently with the available literature results. |
| first_indexed | 2024-04-13T23:28:16Z |
| format | Article |
| id | doaj.art-c4c440d7129f495a956c8542c600f208 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-04-13T23:28:16Z |
| publishDate | 2022-10-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-c4c440d7129f495a956c8542c600f2082022-12-22T02:25:00ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902022-10-0194310.1590/0001-3765202220210545Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental dataRACHEL F. MAGALHÃEShttps://orcid.org/0000-0002-1364-3748ALEXANDRA H. DE BARROShttps://orcid.org/0000-0001-0963-2885MARCIA M. TAKEMATSUhttps://orcid.org/0000-0001-9323-3898ALAN PASSEROhttps://orcid.org/0000-0003-1938-8458MILTON F. DINIZhttps://orcid.org/0000-0003-0246-0660JAIRO SCIAMARELIhttps://orcid.org/0000-0001-8014-9603RITA C.L. DUTRAhttps://orcid.org/0000-0001-9958-1279Abstract Silica is a versatile material employed in different applications fields including aerospace, especially for rocket engines thermal protections. It is known that particles diameter causes variations in the material properties, and the best-known methods for diameter determination in general consist of several steps in sample preparation such as drying, sieving and the determination of the refractive index according different methods. On the other hand, Fourier transform infrared spectroscopy techniques (FT-IR), in reflectance mode, related to the particle size, are less used for this type of determination. Moreover, methodologies in the near infrared region (NIR) are even less explored. Therefore, the aim of this paper is to present a FTIR methodology for diffuse reflectance (DRIFT) in the middle infrared region (MIR) and reflectance analysis in near infrared region (NIRA) for the determination of the particle diameter on silica samples. Both methodologies showed good results. As proven by a test sample analysis, NIRA methodology indicated better precision. Furthermore, considering small and intermediated particle sizes, a tendency towards smaller errors for the absorbance measurements of the samples was found, consistently with the available literature results.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000501706&tlng=enParticle diameterDRIFTMIRNIRAsilica |
| spellingShingle | RACHEL F. MAGALHÃES ALEXANDRA H. DE BARROS MARCIA M. TAKEMATSU ALAN PASSERO MILTON F. DINIZ JAIRO SCIAMARELI RITA C.L. DUTRA Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data Anais da Academia Brasileira de Ciências Particle diameter DRIFT MIR NIRA silica |
| title | Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data |
| title_full | Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data |
| title_fullStr | Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data |
| title_full_unstemmed | Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data |
| title_short | Infrared reflectance techniques applied to silica particles diameter determination - theoretical and experimental data |
| title_sort | infrared reflectance techniques applied to silica particles diameter determination theoretical and experimental data |
| topic | Particle diameter DRIFT MIR NIRA silica |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000501706&tlng=en |
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