• Effect of substitution of sand stone dust for quartz and clay in triaxial porcelain composition

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      https://www.ias.ac.in/article/fulltext/boms/035/05/0897-0904

    • Keywords

       

      Environmental pollutant; sand stone dust; ceramic tiles; pavement block; vitrification; triaxial porcelain.

    • Abstract

       

      Quartz and kaolin were partially substituted by sand stone dust (a siliceous byproduct of Indian stone cutting and polishing industries) in a traditional triaxial porcelain composition consisting of kaolin, quartz and feldsper. The effect of substitution upon heating at different temperatures (1050–1150°C) were studied by measuring the linear shrinkage, bulk density, porosity and flexural strength. Qualititative phase and microstructural analysis on selected samples were carried out using XRD and SEM/EDX technique. The results show that the samples of all the batches achieved higher density (2.50 g/cc) and almost full vitrification (<0.1% apparent porosity) at around 1115°C compared to around 1300°C for traditional triaxial porcelain composition. As high as 70 MPa flexural strength was obtained in most of the vitrified samples. No significant variation in physico-mechanical properties was observed in between the composition. XRD studies on selected samples show presence of mainly quartz phase both at low and high temperatures. SEM photomicrographs of the 1115°C heated specimen show presence of quartz grain and glassy matrix. Few quartz grains (20–40𝜇m) are associated with circumferential cracks around them.

    • Author Affiliations

       

      M K Haldar1 S K Das1

      1. Refractories Division, CSIR-Central Glass & Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India
    • Dates

       
  • Bulletin of Materials Science | News

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