Fire clay

Fire clay

Fire clay is a specific kind of clay used in the manufacture of ceramics, especially fire brick. The fire attribution is given for its refractory characteristics. There are two types of fire clay: flint clay and plastic fire clay.

It is resistant to high temperatures, has a fusion point higher than 1,600°C, and therefore it is suitable for lining furnaces, as fire brick, and manufacture of utensils used in the metalworking industries, such as crucibles, saggars, retorts, and glassware. Because of its stability during firing in the kiln, it can be used to make complex items of pottery such as pipes and sanitary ware. Its chemical composition consists of a high percentage of silicon and aluminium oxides, and a low percentage of the oxides of sodium, potassium, and calcium. Unlike conventional brick-making clay, it is mined at depth, usually found as a seatearth associated with coal measures.


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  • Fire clay — Fire Fire (f[imac]r), n. [OE. fir, fyr, fur AS. f[=y]r; akin to D. vuur, OS. & OHG. fiur, G. feuer, Icel. f[=y]ri, f[=u]rr, Gr. py^r, and perh. to L. purus pure, E. pure Cf. {Empyrean}, {Pyre}.] 1. The evolution of light and heat in the… …   The Collaborative International Dictionary of English

  • Fire clay — Clay Clay (kl[=a]), n. [AS. cl[=ae]g; akin to LG. klei, D. klei, and perh. to AS. cl[=a]m clay, L. glus, gluten glue, Gr. gloio s glutinous substance, E. glue. Cf. {Clog}.] 1. A soft earth, which is plastic, or may be molded with the hands,… …   The Collaborative International Dictionary of English

  • fire clay — fire′ clay n. bui cer a refractory clay used for making crucibles, firebricks, etc • Etymology: 1810–20 …   From formal English to slang

  • fire clay — a refractory clay used for making crucibles, firebricks, etc. [1810 20] * * * fire clay noun A clay poor in lime and iron, suitable for making fire resistant pottery and firebricks • • • Main Entry: ↑fire * * * fire clay, a clay capable of… …   Useful english dictionary

  • fire clay — a refractory clay used for making crucibles, firebricks, etc. [1810 20] * * * …   Universalium

  • fire clay — noun a type of clay that is able to withstand intense heat; used to make firebricks, crucibles, and other ceramics …   Wiktionary

  • fire clay — heat resistant durable clay …   English contemporary dictionary

  • Fire — (f[imac]r), n. [OE. fir, fyr, fur AS. f[=y]r; akin to D. vuur, OS. & OHG. fiur, G. feuer, Icel. f[=y]ri, f[=u]rr, Gr. py^r, and perh. to L. purus pure, E. pure Cf. {Empyrean}, {Pyre}.] 1. The evolution of light and heat in the combustion of… …   The Collaborative International Dictionary of English

  • Fire alarm — Fire Fire (f[imac]r), n. [OE. fir, fyr, fur AS. f[=y]r; akin to D. vuur, OS. & OHG. fiur, G. feuer, Icel. f[=y]ri, f[=u]rr, Gr. py^r, and perh. to L. purus pure, E. pure Cf. {Empyrean}, {Pyre}.] 1. The evolution of light and heat in the… …   The Collaborative International Dictionary of English

  • Fire annihilator — Fire Fire (f[imac]r), n. [OE. fir, fyr, fur AS. f[=y]r; akin to D. vuur, OS. & OHG. fiur, G. feuer, Icel. f[=y]ri, f[=u]rr, Gr. py^r, and perh. to L. purus pure, E. pure Cf. {Empyrean}, {Pyre}.] 1. The evolution of light and heat in the… …   The Collaborative International Dictionary of English

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