けい酸ジルコニウム(IV) 化學(xué)特性,用途語(yǔ),生産方法
外観
白色～わずかにうすい褐色, 粉末
定義
本品は、次の化學(xué)式で表される無(wú)機(jī)化合物である。
溶解性
水に溶けない。
化粧品の成分用途
不透明化剤、研磨.スクラブ剤
特徴
SiO4四面體とZrからなる構(gòu)造．Zrへは4回回反軸方向に引き延ばされた四面體形に配位する四つのO (227 pm)と，四面體各面の外側(cè)から配位する四つのO (213 pm)の合計(jì)8原子が配位している
説明
Zircon (ZrSiO4) is an accessory nesosilicate mineral found in
granites and, due to its high Mohs hardness of 7.5 and chemical inertness, it concentrates in
the weathering products of mother igneous rocks such as in alluvial placer deposits and
beach sands. Because of its chemical inertness and high melting point, zircon is wetted less
easily by molten metal, producing smoother surfaces on iron, high alloy steel, aluminum,
and bronze casting.
化學(xué)的特性
Zirconium silicate is a colorless tetragonal crystals (when pure); presence of impurities forms various colors; density 4.56 g/cm3; hardness 7.5 Mohs; dissociates to ZrO2 and SiO2 above 1,540°C; melts at 2,550°C; insoluble in water, acids, aqua regia, and alkalies; inert in most chemicals. Zirconium silicate is used as an additive to glass, in ceramic tiles, in ultrafiltration membranes, and as a dental abrasive.
使用
Zirconium silicate (ZrSiO4) is one form of the mineral whose crystals when polished are
known as cubic zircons, which resemble diamond gemstones.
製造方法
Zirconium silicate occurs in nature as mineral zircon. Ore is mined from natural deposits and concentrated by various techniques (See Zirconium, Recovery). It is separated from sand by electrostatic and electromagnetic methods. Also, the compound can be made by fusion of SiO2 and ZrO2 in an arc furnace, or by reacting a zirconium salt with sodium silicate in aqueous solution.
定義
Zirconium silicate is a naturally occurring silicateof zirconium, ZrSiO4, used as a gemstone.The colour depends in smallamounts of other metals and may bered, brown, yellow, or green. Redgem-quality zircon is sometimescalled jacinth; gem-quality zirconswith other colours are called jargoons.There is also a naturally occurringcolourless variety. Zircongems can be given other colours, ormade colourless, by heat treatment.The colourless varieties (either naturalor treated) are sometimes calledMatura diamonds (after Matura in SriLanka). The name 'zircon' is often erroneouslyapplied to a synthetic formof the oxide cubic zircona, which isused as a diamond substitute.
參考文獻(xiàn)
K. Robinson, G.V. Gibbs, P.H. Ribbe, Am. Mineral., 56, 782 (1971).
けい酸ジルコニウム(IV) 上流と下流の製品情報(bào)
原材料
準(zhǔn)備製品