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Metakaolin is the anhydrous calcined form of the clay mineral kaolinite. Rocks that are rich in kaolinite are known as china clay or kaolin, traditionally used in the manufacture of porcelain . The particle size of metakaolin is smaller than cement particles, but not as fine as silica fume .
Kaolinite (/ ˈ k eɪ. ə l ə ˌ n aɪ t,-l ɪ-/ KAY-ə-lə-nyte, -lih-; also called kaolin) [5] [6] [7] is a clay mineral, with the chemical composition Al 2 Si 2 O 5 4.It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO 4) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6).
Five Yixing clay teapots showing a variety of styles from formal to whimsical. Yixing clay (simplified Chinese: 宜兴泥; traditional Chinese: 宜興泥; pinyin: Yíxīng ní; Wade–Giles: I-Hsing ni) is a type of clay from the region near the city of Yixing in Jiangsu Province, China, used in Chinese pottery since the Song dynasty (960–1279) when Yixing clay was first mined around China's ...
English China Clays was incorporated in April 1919 through the amalgamation of three of the largest producers: Martin Bros.(established in 1837), West of England China Clay & Stone (1849) and the North Cornwall China Clay Company (1908). [1] The three companies accounted for around half the industry's output at the time. [2]
Bentonite production (tonnes) per country in 2006 Country (or area) Production World 14,600,000 United States 4,620,000 China * 3,200,000 Greece 1,100,000 India *
Chinese porcelain is mainly made by a combination of the following materials: Kaolin – essential ingredient composed largely of the clay mineral kaolinite. [6]Porcelain stone – decomposed micaceous or feldspar rocks, historically also known as petunse.
Bone china is a type of vitreous, translucent pottery, [1] the raw materials for which include bone ash, feldspathic material and kaolin.
Bone china was perfected by Josiah Spode (1733–1797) of Stoke-upon-Trent in England. [9] The basic formula is 50% calcined cattle bone, 25% Cornish stone and 25% china clay. The stone and clay are both derived from granite. The stone is a feldspathic flux that melts and reacts with the other ingredients.
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