材质:漂珠 | 产品类别:硅酸铝耐火纤维毯 | 产品种类:保温钉 |
等级:1 | 品牌:安家净 | 应用范围:JG149-2003 |
产地:河南 | 导热系数(常温):0.056 | 低温弯折≤:1 |
断裂伸长率:1 | 抗弯强度:11 | 抗压强度:1 |
使用温度:500 | 芯材:1 | 形态:气泡状 |
形状:长方形 | 规格:1 |
rift b
eads characteristics
1, high refractoriness, the main chemical compositions for silicon drift beads, aluminum oxide, silica (SiO2) about 50-65%, 3 oxidation 2 aluminium (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 (N2 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 silicon aluminum oxide mineral phases (quartz and mullite) formation of hard vitreous, hardness of Morse 6-7, hydrostatic strength up to 70-140 mpa, true density of 2.10 2.20 g/cm3, therefore, drift beads with high strength.General light porous or insulating materials such as boiling rocks, diatomite, perlite, sea pumice, expanded vermiculite is the difference in hardness, strength is poor, with its system of thermal insulation products or light refractory products, intensity difference flaws.The advantages of their shortcomings is drift beads, so drift beads have more competitive advantages, used more widely.
4, excellent electrical insulation, non-conductive: choose after degaussing beads drift beads, is the performance of insulation materials, conductive.Insulation resistance are commonly by the rise of temperature, drift beads, on the other hand, increases with the increase of temperature resistance.This advantage is don't have other insulating materials.So, it can make is performance under the condition of high temperature insulation products.
一、漂珠的化学成份:
成 分 | SiO2 | Al2O3 | Fe2O3 | SO3 | CaO | MgO | K2O | Na2O |
含量(%) | 56-62 | 33-38 | 2-4 | 0.1-0.2 | 0.2-0.4 | 0.8-1.2 | 0.5-1.1 | 0.3-0.9 |
二、漂珠物理性能
项 目 | 测试指标 | 项 目 | 测试指标 |
形 状 | 高流动性球状粉体 | 粒经 (um) | 10-400 |
颜 色 | 浅灰白色 | 比电阻(Ω.CM) | 1010-1013 |
真密度 | 0.5-0.8 | 莫氏硬度 | 6-7 |
堆积密度 (g/cm3) | 0.3-0.5 | PH值(水分散系中) | 6 |
耐火度 ℃ | 1750 | 熔点(℃) | ≥1400 |
导温系数(m2/h) | 0.000903-0.0015 | 导热系数 (w/m·k) | 0.054-0.095 |
抗压强度 (Mpa) | ≥350 | 折光率 | 1.54 |
灼失率 | 1.33 | 吸油率g(oil)/g | 0.68-0.69 |
三、漂珠的特性:
1、高耐火度;漂珠的主要化学成分为硅、铝的氧化物,其中二氧化硅约为50-65%,三氧化二铝约为25-35%。因为二氧化硅的溶点高达摄氏1725度,三氧化二铝的溶点为摄氏2050度,均为高耐火物质。因此,漂珠具有极高的耐火度,一般达摄氏1600-1700度,使其成为优异的高性能耐火材料。
漂珠是一种能浮于水面的粉煤灰空心球,呈灰白色,壁薄中空,重量轻,容重为250-450kg/m3,粒径约0.1毫米,表面封闭而光滑,热导率小,耐火度≥1700℃,是优良的保温耐火材料,广泛用于轻质浇注料的生产和石油钻井方面。漂珠的化学成份以二氧化硅和三氧化二铝为主,具有颗粒细、中空、质轻、高强、耐磨、耐高温、保温绝缘、绝缘阻燃等多种功能,现已广泛应用于各个行业。
漂珠特性
1、高耐火度;漂珠的主要化学成分为硅、铝的氧化物,其中二氧化硅约为50-65%,三氧化二铝约为25-35%。因为二氧化硅的溶点高达摄氏1725度,三氧化二铝的溶点为摄氏2050度,均为高耐火物质。因此,漂珠具有极高的耐火度,一般达摄氏1600-1700度,使其成为优异的高性能耐火材料。
2、 质轻、保温隔热;漂珠壁薄中空,空腔内为半真空,只有极微量的气体(N2、H2及CO2等),热传导极慢极微。所以漂珠不但质轻(容重250-450公斤/m3),而且保温隔热优异(导热系数常温0.08-0.1),这为其在轻质保温隔热材料领域大显身手奠定了基础。
3、硬度大、强度高;由于漂珠是以硅铝氧化物矿物相(石英和莫来石)形成的坚硬玻璃体,硬度可达莫氏6-7级,静压强度高达70-140MPa,真密度2.10-2.20克/cm3,因此,漂珠具有很高的强度。
4、绝缘不导电;一般绝缘体的电阻均随温度的升高而降低,漂珠则相反,随温度的升高电阻增大。这一优点是其他绝缘材料都不具备的。所以,它可以制作是性能优异的绝缘材料。5、粒度细,比表面积大;漂珠自然形成的粒度为1-250微米。比表面积300-360g/cm2,和水泥差不多。因此,漂珠不需粉磨,可直接使用。细度可满足各种制品的需要。
漂珠用途
1、耐火保温材料;如轻质烧结耐火砖、轻质免烧耐火砖、铸造保温冒口、管道保温外壳、防火保温涂料、保温隔热膏、复合隔热干粉、轻质保温耐磨玻璃钢