Line 3: |
Line 3: |
| ==Origin== | | ==Origin== |
| alteration of ''refractary'', from [[Latin]] ''refractarius'', irregular from ''refragari'' to oppose, from ''re''- + -''fragari'' (as in ''suffragari'' to [[support]] with one's [[vote]]) | | alteration of ''refractary'', from [[Latin]] ''refractarius'', irregular from ''refragari'' to oppose, from ''re''- + -''fragari'' (as in ''suffragari'' to [[support]] with one's [[vote]]) |
− | *[http://en.wikipedia.org/wiki/17th_century 1606] | + | *[https://en.wikipedia.org/wiki/17th_century 1606] |
| ==Definitions== | | ==Definitions== |
| *1: resisting [[control]] or [[authority]] : stubborn, unmanageable | | *1: resisting [[control]] or [[authority]] : stubborn, unmanageable |
Line 11: |
Line 11: |
| *3: [[difficult]] to [[fuse]], corrode, or draw out; especially : capable of enduring high [[temperature]] | | *3: [[difficult]] to [[fuse]], corrode, or draw out; especially : capable of enduring high [[temperature]] |
| ==Description== | | ==Description== |
− | A '''refractory''' [[material]] is one that retains its [[strength]] at high [[temperatures]]. [http://en.wikipedia.org/wiki/ASTM_International 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)". | + | A '''refractory''' [[material]] is one that retains its [[strength]] at high [[temperatures]]. [https://en.wikipedia.org/wiki/ASTM_International 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 linings for furnaces, [http://en.wikipedia.org/wiki/Kiln kilns], incinerators and [http://en.wikipedia.org/wiki/Nuclear_reactor_technology reactors]. They are also used to make [http://en.wikipedia.org/wiki/Crucible crucibles].[http://en.wikipedia.org/wiki/Refractory] | + | Refractory materials are used in linings for furnaces, [https://en.wikipedia.org/wiki/Kiln kilns], incinerators and [https://en.wikipedia.org/wiki/Nuclear_reactor_technology reactors]. They are also used to make [https://en.wikipedia.org/wiki/Crucible crucibles].[https://en.wikipedia.org/wiki/Refractory] |
| | | |
| [[Category: General Reference]] | | [[Category: General Reference]] |