Characterization of microstructural and thermal properties of steatite/cordierite ceramics prepared by using natural raw materials

Hasan Gökçe*, Duygu Aĝaoĝullari, M. Lütfi Öveçoĝlu, ismail Duman, Tahsin Boyraz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Steatite/cordierite ceramics were fabricated by using a combined method of high-energy ball milling, cold pressing and sintering. Steatite and cordierite powders were separately synthesized from natural raw materials such as kaolinite and talc. The powder blends containing different amounts of cordierite (5, 10 and 20. wt.%) were wet-milled for 1. h in a vibratory ball-mill (Fritsch™ Pulverisette 7 Premium Line), using zirconia vial and balls. After drying, powders were compacted to cylindrical preforms with a diameter of 12.7. mm by uniaxial pressing at 300. MPa. The green compacts were sintered at 1200-1350°C for 2. h under air. Phase, microstructural and thermal characterizations of the sintered materials were carried out by using X-ray diffraction technique (XRD), thermogravimetry/differential thermal analyzer (TG/DTA) and scanning electron microscope (SEM). Densities, open porosity and water absorption values of sintered bodies were measured by Archimedes method. Thermal expansion coefficient (CTE) measurements were conducted by a dilatometer.

Original languageEnglish
Pages (from-to)2741-2747
Number of pages7
JournalJournal of the European Ceramic Society
Volume31
Issue number14
DOIs
Publication statusPublished - Nov 2011

Funding

This study is one of the outcomes of a research project entitled “Development of Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques” funded by State Planning Organization (DPT) with the project number 90189. Further, we would like to express our gratitude to State Planning Organization (DPT) for funding the project entitled “Advanced Technologies in Engineering” with the project number 2001K120750 out of which the main infrastructure of the Particulate Materials Laboratories was founded.

FundersFunder number
DPT90189, 2001K120750
Devlet Planlama Örgütü

    Keywords

    • Milling
    • Pressing
    • Silicates
    • Sintering
    • Steatite/cordierite

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