minium (Al2O3) about 25-35%.Because the melting point of silica (SiO2) is as high as 1725 degrees Celsius, 3 oxidation 2 aluminium (Al2O3), the melting point of 2050 degrees Celsius, are all high refractory material.Therefore, drift beads have high refractoriness, generally 1600-1600 degrees Celsius, make its excellent high performance refractories.
2, light, heat preservation and heat insulation: drift beads thin wall hollow, empty cavity for half a vacuum, only trace amounts of the gas (N/cm3)
0.5-0.8
莫氏硬度
6-7
堆積密度(g/cm3)
0.3-0.5
PH值（水分散系中）
6
耐火度（℃）
1750
熔點(diǎn)(℃)
≥1400
導(dǎo)溫系數(shù)(m2/h)
0.000903-0.0015
導(dǎo)熱系數(shù)(w/m·k)
0.054-0.095
抗壓強(qiáng)度(Mpa)
≥350
折光率（%）
1.54
灼失率（%）
1.33
吸油率g(oil)/g
0.68-0.69

漂珠用途
1、耐火保溫材料：如輕質(zhì)燒結(jié)耐火磚、輕質(zhì)免燒耐火磚、鑄造保溫冒口、管道保溫外殼、防火保溫涂料、保溫隔熱膏、復(fù)合隔熱干粉、輕質(zhì)保溫耐磨玻璃鋼。
2、建筑材料：建筑裝飾、路面鋪料、屋頂防水保溫涂層、道路工程、改性瀝青等。
3、石油工業(yè)：油田固井、管道防腐保溫、海底油田、漂浮裝置、油井鉆探泥漿減輕劑、石油天然氣輸送管道等方面。
4、絕緣材料：塑料活化填充劑、高溫高壓絕緣體等。
5、涂料工業(yè)：油漆、油墨，粘合劑、隱身涂料、絕緣漆、防腐漆、地坪漆、耐高溫防火漆、內(nèi)外墻涂料、保溫涂料、地板漆、汽車膩?zhàn)?、原子灰等?br /> 6、航天和空間開(kāi)發(fā)：衛(wèi)星、火箭、飛船表面復(fù)合材料，衛(wèi)星防火層，海洋設(shè)備、船舶、深海潛艇等。
7、塑料工業(yè)：如汽車飾件、儀表板、家電外殼、風(fēng)扇、音箱2 and H2 and CO2, etc.), heat transfer is very slow.So drift beads not only light (250-450 kg/m3 density), excellent heat preservation and heat insulation and thermal conductivity at room temperature (0.08-0.1), which play a prominent role in the field of lightweight thermal insulation material for its laid a solid foundation.
3, high hardness, high strength: because of drift beads on s

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