The effect of CaCO3 addition on the crystallization behavior of ZnO crystal glaze fired at different gloss firing and crystallization temperatures | Zendy

Abdul Rashid Jamaludin | Zendy; Shah Rizal Kasim | Zendy; Zainal Arifin Ahmad | Zendy

Open Access

The effect of CaCO3 addition on the crystallization behavior of ZnO crystal glaze fired at different gloss firing and crystallization temperatures

Author(s) -

Abdul Rashid Jamaludin,

Shah Rizal Kasim,

Zainal Arifin Ahmad

Publication year - 2010

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos1003345j

Subject(s) - gloss (optics) , glaze , crystallization , materials science , scanning electron microscope , acicular , crystal (programming language) , chemical engineering , mineralogy , ceramic , metallurgy , composite material , microstructure , chemistry , computer science , engineering , programming language , coating

A glazed ceramic product with crystalline structure gives an artistic effect. In this study, the effects of calcium carbonate (CaCO3) addition into glaze batches on the crystallization behavior of crystal glaze were studied. Samples were fired at different gloss firing temperatures ranging from 1000-1200°C with 1060°C crystallization temperature. Xray diffraction (XRD) and energy dispersive X-ray spectrometer (EDX) analysis of the phases identified these crystals as willemite (Zn2SiO4) in the form of spherulites. Scanning electron microscope (SEM) analysis indicated that willemite crystals are in the acicular needle like shape. XRD result showed that the intensities of crystal peaks decreased with the addition of CaCO3 up to 3.0 wt%. However, there was no willemite crystals formation as the amount of CaCO3 raised to 5.0 wt%. Besides that, the results also indicated that willemite growth occurs during isothermal holding at crystallization temperature instead of during cooling from gloss firing temperature

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