Опубликовано в "Бизнес, Бизнес", язык - English. 4 страниц.
The purest form of aluminum oxide, also known as alpha-alumina is referred to sapphire glass or synthetic sapphire. It has a melting temperature of 3,722°F, chemically inert, thermally stable and hard till 2,912°F. The properties that make sapphire a beneficial glass in various applications is its hardness and clarity. Еще
