Synthetic clay for ceramics and process for production thereof
AssigneeCosmo Clay & Ceramics Co., Ltd.
InventorsIemitsu Ohshima, Akira Kikuhata
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Abstract
A synthetic clay for ceramics is formed of 30-65 wt % of amorphous silica, 30-65 wt % of alumina trihydrate, and 2-20 wt % of at least one element selected from a group consisting of sepiolite, palygorskite, and bentonite. The clay may have a slurry form, partially dehydrated form, or mass or dry powder. The synthetic clay is comparable or even superior to natural clay in plasticity, water retentivity and capability of forming water film. The synthetic lay is useful for ceramic industry or pottery.
Claims10
A synthetic clay for ceramics which comprises 30-65 wt % of amorphous silica, 30-65 wt % of alumina trihydrate, and 2-20 wt % of at least one material selected from the group consisting of sepiolite, palygorskite, and bentonite.
A synthetic clay for ceramics which comprises 30-65 wt % of fumed silica, 30-65 wt % of aluminum hydroxide, and 2-20 wt % of sepiolite.
A process for producing a synthetic clay for ceramics, comprising preparing slurries from raw materials of amorphous silica, alumina trihydrate and at least one material selected from the group consisting of sepiolite, palygorskite and bentonite by wet milling, and mixing the resulting slurries to contain, excluding water, 30-65 wt % of the amorphous silica, 30-65 wt % of the alumina trihydrate, and 2-20 wt % of the at least one material selected from the group consisting of sepiolite, palygorskite and bentonite.
Dependencies are inferred from the claim text.