Silika zvidhinha zvegirazi honi

Zvidhinha zvesilika zvinoshandiswa zvakanyanya muvira regirazi, uye chikamu chavo chikuru isilicon dioxide (SiO2). Silica zvidhinha zvegirazi kilns inoda silica content inopfuura 94%, yakanyanya kushanda tembiricha inosvika 1600-1650 ° C, uye density ye1.8-1.95g/cm3. Iyo yakakwirira iyo porosity, iyo yakaipisisa kunaka kwesilica brick. Kuonekwa kwe silica zvidhinha kazhinji machena makristasi, uye kuumbwa kwayo kusingaonekwi ndeye tridymite crystals. Nekuti zvidhinha zvesilicon zvichapinda shanduko yekristalllization uye kuwedzera kwevhoriyamu pakupisa kwakanyanya, kunyanya pa180-270 ° C uye 573 ° C, shanduko yekristalllization yakanyanya. Nokudaro, kuitira kuti uenderane nekristalline shanduko ye silica zvidhinha panguva yekubika uye kugadzirisa kutonhora, matanho akakodzera anofanirwa kutorwa, sekusunungura uye kudhonza bhari rekumanikidza. Majoini ekuwedzera anofanirwa kuchengeterwa silicon zvidhinha masonry.

Tembiricha yekushanda yesilica zvidhinha inosvika 200 ℃ yakakwirira kupfuura yezvidhinha zvevhu, asi zvidhinha zvesilica zvine kushomeka kwekupokana negirazi rakanyungudutswa uye alkali inobhururuka zvinhu, saka anoshandiswa kune arch, parapets uye madiki mavira. Kana masonry, zvinokurudzirwa kushandisa yakakwira-silicon refractory dope kana silica zvidhinha poda sesimende zvinhu.