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Borate glass : ウィキペディア英語版 | Borate glass
Borate glasses have a more complex action of alkali ions than silicate glasses.〔http://www.ptc.tugraz.at/specmag/struct/sb.htm〕 Borate glasses also have major differences in their optical properties.〔http://www.hindawi.com/isrn/ceramics/2012/428497/〕 The single largest use of boron compounds in the world (accounting for half of total global use) is the production of certain types of boron-treated glass fiber for insulating and structural fiberglass. 〔http://ec.europa.eu/enterprise/sectors/chemicals/files/docs_studies/annex_use_glass_glass_fibre_en.pdf〕 In these uses the boron may be present as borax or boron oxide, and adds to the structural strength of the glass as borosilicate, or is added as a fluxing agent to decrease the melting temperature of pure silica, which is difficult to extrude as fibers and work with in pure form, due to the high temperatures involved. ==References== 〔
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