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Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin

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Main Authors: Banjuraizah, Johar, Hasmaliza, Mohamad, Zainal Arifin, Ahmad
Format: Article
Language:English
Published: Elsevier B.V. 2009
Subjects:
Single-phase α-cordierite
Rietveld refinement
Glass method
Materials engineering
Ceramic materials
Crystallization
Glass
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/6660
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spelling my.unimap-66602009-08-02T04:50:30Z Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin Banjuraizah, Johar Hasmaliza, Mohamad Zainal Arifin, Ahmad Single-phase α-cordierite Rietveld refinement Glass method Materials engineering Ceramic materials Crystallization Glass Link to publisher's homepage at www.elsevier.com Cordierite body with the formulation of 2.8MgO·1.5Al2O3·5SiO2 was prepared from talc and kaolin as the basic raw materials. Following glass crystallization technique the glass powder was successfully heat treated at 900 °C for 2 h to form a single-phase α-cordierite. The crystal structure of α-cordierite was analysed using X-ray diffraction technique and the Rietveld structural refinement method. Differential thermal analysis (DTA), Fourier-transform infrared (FTIR), field emission scanning electron microscopy (FESEM), coefficient of thermal expansion (CTE) and dielectric properties were also performed. Results show that the materials crystallized as a hexagonal structure with space group of P6/mcc and the room temperature lattice parameters are a = 9.743742 (Å) and c = 9.389365 (Å). FTIR analysis on the glass revealed that only silicate species is the only unit that exists in the glass network. DTA also confirmed that α-cordierite completely formed after 13.5 min of isothermal heating at 900 °C. Coefficient of thermal expansion of synthesized α-cordierite is 2.5 × 10−6 °C−1. The dielectric constant is between 5.0 and 5.5 for 1 MHz and 1.8 GHz, respectively, and the dielectric loss is in the range 10−2. FESEM micrographs revealed that the material is fully densified. 2009-08-02T04:49:46Z 2009-08-02T04:49:46Z 2009-08 Article Journal of Alloys and Compounds, vol.482 (1-2), 2009, pages L1-L36, 1-570 0925-8388 http://www.sciencedirect.com/science/journal/09258388 http://hdl.handle.net/123456789/6660 en Elsevier B.V.
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Single-phase α-cordierite
Rietveld refinement
Glass method
Materials engineering
Ceramic materials
Crystallization
Glass
spellingShingle Single-phase α-cordierite
Rietveld refinement
Glass method
Materials engineering
Ceramic materials
Crystallization
Glass
Banjuraizah, Johar
Hasmaliza, Mohamad
Zainal Arifin, Ahmad
Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
description Link to publisher's homepage at www.elsevier.com
format Article
author Banjuraizah, Johar
Hasmaliza, Mohamad
Zainal Arifin, Ahmad
author_facet Banjuraizah, Johar
Hasmaliza, Mohamad
Zainal Arifin, Ahmad
author_sort Banjuraizah, Johar
title Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
title_short Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
title_full Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
title_fullStr Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
title_full_unstemmed Crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
title_sort crystal structure of single phase and low sintering temperature of α-cordierite synthesized from talc and kaolin
publisher Elsevier B.V.
publishDate 2009
url http://dspace.unimap.edu.my/xmlui/handle/123456789/6660
_version_ 1643788534122807296
score 13.222552

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