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Development of heat resistant body using Sanchung Kaolin and Jangsu gobdol sludge

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2020, 30(1), pp.27-32
  • DOI : 10.6111/JKCGCT.2020.30.1.027
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : January 7, 2020
  • Accepted : January 26, 2020
  • Published : February 29, 2020

Sanggon Kim 1

1진묵도예

Accredited

ABSTRACT

The main cystal phases of traditional ceramics made of clay, quartz, and feldspar are mullite and cristobalite. Although mullite can provide strength to the ceramic body, it cannot be used for the heat resistant ceramics because the thermal expansion coefficient of it is relatively high as 5.3×10-6/°C. In this study, development of lightweight heat resistant ceramics was tried by producing cordierite phase, of which the thermal expansion coefficient is 2.6 × 10-6/°C, instead of forming mullite phase in the ceramic body by using Sanchung Kaolin and Jangsu gobdol sludge. It was concluded that ceramics having good heat resistant, bending strength, and refractoriness under load could be fabricated when 80 wt% of Sanchung Kaolin and 20 wt% of Jangsu gobdol sludge were used as raw materials. Also, the bulk specific gravity is 1.78, which is lighter than the existing Buncheong ware.

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