REFRACTORY - ορισμός. Τι είναι το REFRACTORY
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Τι (ποιος) είναι REFRACTORY - ορισμός

RESISTANT MATERIAL
Refractory material; Refractory brick; Refractory lining; Refractory ceramic; Refractories; Refractoriness; Castable; Refractory materials
  • torpedo car]] used for hauling molten iron

refractory         
Refractory people are difficult to deal with or control, for example because they are unwilling to obey orders. (FORMAL)
...refractory priests who refused to side with the king.
= recalcitrant
ADJ: usu ADJ n
refractory         
a.
Stubborn, obstinate, stiff, perverse, dogged, mulish, heady, headstrong, cross-grained, intractable, unyielding, contumacious, disobedient, unruly, ungovernable, cantankerous, unmanageable, recalcitrant.
refractory         
¦ adjective formal
1. stubborn or unmanageable.
2. resistant to a process or stimulus.
Medicine not yielding to treatment.
technical heat-resistant; hard to melt or fuse.
¦ noun (plural refractories) technical a heat-resistant substance.
Derivatives
refractoriness noun
Origin
C17: alt. of obs. refractary, from L. refractarius 'stubborn' (see also refract).

Βικιπαίδεια

Refractory

In materials science, a refractory (or refractory material) is a material that is resistant to decomposition by heat, pressure, or chemical attack, and retains strength and form at high temperatures. Refractories are polycrystalline, polyphase, inorganic, non-metallic, porous, and heterogeneous. They are typically composed of oxides or carbides, nitrides etc. of the following materials: silicon, aluminium, magnesium, calcium, boron, chromium and zirconium.

ASTM C71 defines refractories as "non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)".

Refractory materials are used in furnaces, kilns, incinerators, and reactors. Refractories are also used to make crucibles and moulds for casting glass and metals and for surfacing flame deflector systems for rocket launch structures. Today, the iron and steel industry and metal casting sectors use approximately 70% of all refractories produced.

Παραδείγματα από το σώμα κειμένου για REFRACTORY
1. Gradual heating is necessary for raising the temperature within the furnace to the required operating temperature under strictly controlled conditions, ensuring the homogenous expansion of refractory materials.