什么是硅气?
硅气,也称为凝结硅烟或微硅,是一种球形亚微米级非晶二氧化硅,广泛应用于多种领域。
硅气:基础化学原理与多重优势
硅烟雾是 硅 或 铁硅 生产的副产物,由超细(亚微米)、非晶、非多孔、完美球形的二氧化硅(SiO2)颗粒组成,纯度为85–99%。
这些超细颗粒的主要作用是大幅提升颗粒包装性能,并在混凝土及其他水泥结合系统中产生高度火山寨反应,二氧化硅与氢氧化钙反应,从而提升材料的性能水平以及强度和耐久性。
此外,硅气因其非晶(非晶体)结构和高比面积,为多种应用提供了其他有用特性,包括改进烧结能力和耐火铸件高温性能提升,从而引发微硅与耐火混合物其他组分之间的反应。
总结来说,硅烟具有两个关键特性,单独或结合是其高性能的基础:
- 一种高效的 “填充效应”,由球形、非多孔的初级颗粒尺寸约为0.15微米(150纳米)而产生
- 这种 “化学效应”源于其非晶性质和高比表面积使其高度反应性。
对不同行业中一些领先产品和应用的回顾
应用非常广泛,包括建筑、钻井和水泥、耐火材料、聚合物等。这种多功能性也解释了为什么硅烟在不同行业中被称为不同名称,例如冷凝硅烟或微硅,后者例如用于建筑和耐火材料的高性能材料(HPM)。
Elkem 以 MICROSILICA® 品牌销售其广泛的硅烟产品。
在 建筑领域,Elkem MICROSILICA® 产品线提升了多种材料在多种应用中的性能:
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含微硅的高性能混凝土 缩短施工时间,并为建筑、桥梁、运输隧道、道路等提供结构优势和耐久性。
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含微硅的纤维水泥 被用于屋顶材料中,如平板和波纹板、瓦片、管道和新结构的线条,或用于高效替代石棉。
- 含微硅的石膏板 能提升耐火性和芯心强度。
特种产品包括(此列表不限于以下内容,您可在上面的市场页面中找到我们建筑所用的所有微硅粉产品)
ELKEM MICROSILICA® 940
The ELKEM MICROSILICA® 940 product, a dry silica fume powder that improves the properties and characteristics of high-performance concrete and specialist mortar formulations, acting physically to optimize particle packing and chemically as a highly reactive pozzolan. It is available in undensified (U) and densified (D) forms.
Product data sheet fibre cement applications
Product data sheet gypsum board applications
Product data sheet concrete applications
ELKEM MICROSILICA® 920
The ELKEM MICROSILICA® 920 product, a dry silica fume powder that serves as a key ingredient in a wide range of construction materials, acting physically as a filler and chemically as a highly reactive pozzolan. It is used in fiber cement applications as a process aid, to improve ingredient dispersion and to increase hardening and overall durability. It is available in undensified (U) and densified (D) forms.
Product data sheet concrete applications
Product data sheet fibre cement applications
Product data sheet gypsum board applications
对于 耐火材料,Elkem MICROSILICA® 产品具有以下优势:
特种产品包括:
ELKEM MICROSILICA® 971
The ELKEM MICROSILICA® 971 product, a high quality, purpose-made, low-impurity grade, for versatile applications in refractories, available in densified (D) or undensified (U) form, to be used in advanced refractory products such as self-flowing, low, ultra-low and no-cement castables.
Product data sheet
ELKEM MICROSILICA® 968
The ELKEM MICROSILICA® 968 product, a cost-effective alternative for low cement castables, featuring a controlled and stable chemical composition.
Product data sheet
ELKEM MICROSILICA® HQ
The ELKEM MICROSILICA® HQ product is a cost-effective alternative for low cement castables, with controlled and stable chemical composition, based on low alkalis and higher reactivity.
Product Data Sheet
ELKEM MICROSILICA® 955
The ELKEM MICROSILICA® 955 product, a medium-quality grade silica fume with tight specification limits based on in-process control, resulting in higher silica content and reduced impurities.
Product data sheet
对于 油田水泥作业,Elkem MICROSILICA® 产品具备必要的结合性和机械性能。
特种产品包括:
MICROBLOCK®
The MICROBLOCK® product, a slurrified multifunctional microsilica additive with a high surface area, processed with quality-controlled particle size distribution that limits gas migration and natural fluid-loss, and improves cement bonding and mechanical properties.
Product data sheet
MICROLITE® P
The MICROLITE® P product, a dry microsilica that creates extra binder phases resulting in lower set-cement permeability and cement slurry density, while maintaining required compressive strength, fluid loss and corrosion resistance in lightweight cement systems.
Product data sheet
MICROLITE® L
The MICROLITE® L product, a pozzolanic slurry with high surface area, which like its powder version enhances compressive strength, lowers permeability, fluid loss and viscosity, resulting in early strength development, strong bonding, and corrosion resistance.
Product data sheet
Elkem 还提供补充材料,如专用加重剂、便于混合的自由流动产品、优异的分散性、针对井应力的柔性组件或纤维等。这些密切相关的产品的选择基于具体应用。
Elkem MICROSILICA® ——同级最佳选择
Elkem MICROSILICA® 产品经过精心且准确的加工,确保关键质量参数,原材料的精选(低碱、低挥发物)以及持续的质量控制,这得益于我们严格的 统计过程控制系统(SPC)。这一持续的质量保证计划包括持续的工序监测和分析我们的生产,稳定的收费率,以及炉况的调整,以及成品的后期控制。
这导致了以下几项:
- 硅回收率更高,杂质含量较低
- 通过化学一致性实现的流动和硬化性能的稳定质量和良好的加工性。
在应用阶段,客户将得到经验丰富的Elkem行业专家的全面支持,帮助他们在竞争激烈的业务中取得所需成果。我们高度专业的员工提供全面的客户服务、技术支持、产品开发建议和支持。
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