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Home  >  Journal list  >  Journal of the Ceramic Society of Japan ( 2003 - 2007 )  >  Vol.113  No.1314 (February) (2005)  >  pp.161-165

Journal of the Ceramic Society of Japan ( 2003 - 2007 )
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Coloration Mechanism of Hard Oxidizing Fire Iron Red Glaze (Part 1)
——The Relation among Coloration, Glaze Composition and Formed Crystals——

Wonsook PARK1) and Byungha LEE1)
1) Dept. of Ceramic Engineering, Myongji Univ.

  The purpose of the present experiments is to consider the relations between coloration and crystalline phases of lime-glaze, dolomite-glaze and lime-barium-glaze containing 15 mass% ferric oxide and 15 mass% phosphate. The result of the experiments showed that red color under hard oxidizing fire only appeared in the glaze with MgO, Fe2O3 and P2O5. As a result of X-ray diffractometry, the colour of red was exposed by magnesioferrite-crystal. However, magnesioferrite-crystal can exist as whitlockite-type crystals. The hard oxidizing fire iron red glaze is one of the crystalline glazes which is colorized by magnesioferrite during cooling process from firing. In addition, magnesioferrite crystal formation is closely related to the presence of whitlockite-type crystals.



Keyword:
Hard oxidizing fire iron red glaze, L*a*b*, Colour difference, XRD, Magnesioferrite, Whitlockite-type crystals

Received: July 08, 2004
Accepted: December 15, 2004 , Published online: February 01, 2005
Copyright (c) 2005 The Ceramic Society of Japan

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