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Development of a new engobe for raku ceramics

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2014, 24(1), pp.21-26
  • DOI : 10.6111/JKCGCT.2014.24.1.021
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

권영주 1 Dong-Ha Hwang 2 이병하 1

1명지대학교
2명지대학교 공과대학 신소재공학과

Accredited

ABSTRACT

Red clay has been used for making rakuyaki for the past 400 years. Because the resources for red clay in Japanare being depleted, many potters in Japan began to develop new materials which can replace red clay. In this study, It isanalyzed that the chemical and physical properties of red clay from Shigaraki (Shiga, Japan), and developed a novelengobe which can be used for making Rakuyaki instead of Shigaraki red clay. Results from Raman spectroscopicexamination showed that ferric oxide content in Shigaraki red clay is 9.4 % (Goethite 5 %, Wustite 4.4 %), and that themechanism of red color development by the firing at 900oC for 10 min is the chemical transformation of Goethite intoHematite, and the subsequent formation of solid solution with Alumina and Silica. To make similar ferric oxide content tothat of Shigaraki red clay, we added 5 g of Goethite and 9 g of Wustite to 100 g of White kaolin from Hadong area(Gyeongsangnam-do, Korea). The L*a*b* color scale of the mixture was 56.83, 27.22, and 23.28, respectively, and stablered color was successfully developed under the same firing condition used for Shigaraki red clay.

Citation status

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