Low Expansion Glass-Ceramics Using Industrial Waste and Low-cost Aluminosilicate Minerals: Fabrication and Characterizations. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Mandal, Sitendu; Chatterjee, Raktima; Nag, Sourav; Manna, Srikrishna; Jana, Sunirmal; Biswas, Kaushik; Ambade, Balram
• Is Part Of: Transactions of the Indian Ceramic Society. Volume 82:Issue 1(2023)
• Page Start: 46
• Page End: 55
• Publication Date: 2023-01-02
• Subjects: Low expansion glass-ceramics -- Li2O-Al2O3-SiO2 system -- Blast furnace slag -- China clay -- Pyrophyllite -- Cook-top plate; Pottery -- India -- Periodicals; 666.306254
• DOI: 10.1080/0371750X.2023.2173300
• Languages: English
• ISSNs: 0371-750X

Abstract

Abstract : The recycling of the wastes towards value added product development has become a prime challenge. In this work, a low thermal expansion glass-ceramic material based on ternary LAS (Li2 O-Al2 O3 -SiO2 ) system has been prepared by adopting meltquenching route using industrial waste (blast furnace slag) and low-cost aluminosilicate minerals (China clay and pyrophyllite) at relatively low melting temperature (∼1450°C). A part of the precursor powder for pristine glass has also been prepared by sol-gel processing utilizing Li2 CO3 and Al(NO3 )3 .9H2 O to obtain better homogeneity in the glass composition vis-à-vis glass-ceramics at lower melting temperature. Thermal properties of the material have been characterized to optimize the nucleation and crystallization temperatures for converting glass to glass-ceramics. Phase structure and surface morphology of the glass-ceramics have been analyzed by X-ray diffraction (XRD) and field emission scanning electron microscopy. XRD study reveals the presence of lithium aluminosilicate as a major phase at the crystallization temperature of 730°C. The developed glass-ceramics show a low thermal expansion coefficient (CTE) value of (19±0.5)×10 –7 /°C in the temperature range of 30°-500°C. The present work can unfold an avenue towards conversion of waste into wealth in the form of low CTE glass-ceramics for possible application as cook-top plate of LPG gas oven. GRAPHICAL ABSTRACT: UF0001