Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 56: Issue 1
Evaluation of the Alpo-11 Crystallinity by Thermogravimetry
Authors:
A. Araujo Federal University of Rio Grande do Norte Department of Chemistry CP 1662 59078-970 Natal, RN Brazil CP 1662 59078-970 Natal, RN Brazil

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V. Fernandes Federal University of Rio Grande do Norte Department of Chemistry CP 1662 59078-970 Natal, RN Brazil CP 1662 59078-970 Natal, RN Brazil

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A. Silva Federal University of Rio Grande do Norte Department of Chemistry CP 1662 59078-970 Natal, RN Brazil CP 1662 59078-970 Natal, RN Brazil

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J. Diniz Federal University of Rio Grande do Norte Department of Chemistry CP 1662 59078-970 Natal, RN Brazil CP 1662 59078-970 Natal, RN Brazil

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Pages:
151–157
Online Publication Date:
03 Nov 2004
Publication Date:
01 Jul 1999
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010112215440
Keywords:
aluminophosphate; crystallinity; thermogravimetry
Restricted access

Abstract  

The evaluation of the crystallinity of several samples of ALPO-11 was performed by X-ray diffraction and thermogravimetry. Through XRD, the degrees of crystallinity of the samples were determined by the measurement of the area of the peaks at 2γ ranging from 20.7 to 24.1 degrees. The sample that presented the largest area was considered as 100% crystalline and the areas of the other samples were normalized in relation to this. From TG, the degree of crystallinity was determined considering the mass loss in the temperature range from 453 to 653 K that is related to remotion of di-isopropylamine molecules used during the synthesis procedure. The quantity of diisopropylamine on the material is proportional to the degree of crystallinity.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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