Some properties of clays for Karatsu ware prepared from sandstone
2013; Ceramic Society of Japan; Volume: 121; Issue: 1417 Linguagem: Inglês
10.2109/jcersj2.121.863
ISSN1882-0743
AutoresHiroaki Katsuki, Nobuaki Kamochi, Akihiko KAWAHARA, Yasumoto KAJIHARA,
Tópico(s)Cultural Heritage Materials Analysis
ResumoClays for Karatsu ware were prepared from ground three sandstones by a stamp-milling and elutriation processes. The chemical and mineralogical properties were studied and compared with those of Amakusa pottery stones for Arita porcelain. Karatsu clays were composed of α-quartz, feldspar and kaolin minerals without sericite, and the mineral composition of normative α-quartz, feldspar and kaolin were 38–48, 26–37, 17–31 mass %, respectively. Coarse particles in Karatsu clays were angular and rough in shape, and had a very broad particle size distribution. Average particle sizes of coarse particles were 24–29 µm, and maximum particle size were 160–260 µm, respectively. Average particle size of coarse particles was four to five larger than that of Amakusa pottery clay.
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