Matrix systems of many types of cement-free refractory concretes (CFRC) have a certain content of highly dispersed components of silica composition, i.e., silica sols, SiO₂ nanoparticles (in HCBS of different compositions), as well as fine silica (“microsilica” MS). The degree of their dispersion and hydration (lyophilic nature), determined by their specific surface, is considered. It is shown that the dispersion medium of HCBS containing SiO₂ is a relatively concentrated silica sol. With respect to hydrophilic and colloidal chemical characteristics, SiO₂ nanoparticles in HCBS with comparable dispersion are similar to ordinary silica sols. The advantage of SiO₂ nanoparticles in HCBS compared with silica sols is that they are characterized by polydispersion (from 5 – 10 to 100 nm) and purer chemical composition. As a rule silica sols contain 0.2 – 0.4% Na₂O. Compared to CFRC based on a silica binder the advantage of using HCBS as a ceramic concrete matrix system is that it contains all components in an optimum ratio, i.e., not only binders in the form of nanoparticles and a micro-filler (as an MS analog) in the form of particles 0.1 – 2.0 μm, but also polydispersed particles (1 – 100 μm) of corundum or high alumina composition.

中文翻译：

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无水泥耐火混凝土。第3部分。二氧化硅的优良形式作为有效的耐火混凝土成分

许多类型的无水泥耐火混凝土（CFRC）的基体系统均具有一定含量的二氧化硅成分高度分散的成分，即二氧化硅溶胶，SiO ₂纳米粒子（在不同成分的HCBS中）以及精细二氧化硅（“微二氧化硅” “ 多发性硬化症）。考虑它们的分散和水合程度（亲液性质），取决于它们的比表面积。结果表明，含有SiO ₂的HCBS的分散介质是相对浓的硅溶胶。关于亲水性和胶体化学特性，HCBS中具有可比分散性的SiO ₂纳米颗粒与普通硅溶胶相似。SiO ₂的优点与硅溶胶相比，HCBS中的纳米颗粒具有多分散性（5 – 10至100 nm）和更纯的化学组成。作为一项规则硅溶胶含有0.2 - 0.4％的Na ₂ O.相比CFRC基于二氧化硅粘合剂使用HCBS作为陶瓷混凝土基体系统的优点在于，它包含了所有部件在最佳比，即，不仅在粘合剂纳米颗粒的形式和微填料（作为MS类似物）的形式为0.1 – 2.0μm的颗粒，还有刚玉或高铝组成的多分散颗粒（1 – 100μm）。