silica refractory
61materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
62olivine — olivinic /ol euh vin ik/, olivinitic /ol euh vi nit ik/, adj. /ol euh veen , ol euh veen /, n. Mineral. any of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive green to gray green masses as an important constituent of basic… …
63dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
64Mount Union, Pennsylvania —   Borough   Nickname(s): Bricktown USA …
65Borosilicate glass — is a type of glass with the main glass forming constituents silica and boron oxide. Borosilicate glasses are most well known for having very low coefficient of thermal expansion ( 5 / 0 6 / C at 20oC), making them resistant to thermal shock, more …
66Calcium aluminate cements — [P. C. Hewlett (Ed) Lea s Chemistry of Cement and Concrete: 4th Ed , Arnold, 1998, ISBN 0 340 56589 6, Chapter 13] are cements consisting predominantly of hydraulic calcium aluminates. Alternative names are aluminous cement , high alumina cement… …
67Penwyllt — is a Welsh hamlet located in the upper Swansea Valley, to the east of the Black Mountain.A former quarrying village and quicklime production centre, its fortunes rose and fell as a result of the industrial revolution within South… …
68DSF Refractories & Minerals Ltd — DSF Refractories and Minerals Limited is the last major British producer of refactories, specializing in specialist shaped and unshaped refractory products. DSF is located in Friden within the Derbyshire s Peak National Park. DSF also a processor …
69firebrick — /fuyeur brik /, n. a brick made of fire clay. [1785 95; FIRE + BRICK] * * * ▪ building material also called Refractory Brick, refractory material consisting of nonmetallic minerals formed in a variety of shapes for use at high… …
70gold processing — Introduction preparation of the ore for use in various products. For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability.… …
