What is the function of ultrafine silica powder

Ultra fine silicon powder, as the name suggests, is fine. However, for different fields or engineers, the particle size range of ultrafine silicon micro powder referred to varies, basically referring to silicon micro powder ranging from 1.5um to 10um. The use is quite extensive. The inherent characteristics of silicon micro powder include acid and alkali resistance, hardness, wear resistance, thermal stability, and insulation. In addition, by turning SiO2 into a very fine powder, the specific surface area increases, and filling can also serve as reinforcement, improving the mechanical properties of the material. Various physical properties make the use of this type of silicon micro powder quite extensive, involving industries related to materials such as rubber, plastics, fibers, coatings and inks, ceramics, and casting. However, the quality difference of ultrafine silica powder will directly affect the performance of the material.

Silicon micro powder is used as an electronic assembly material, mainly for waterproofing, dust prevention, harmful gas prevention, vibration reduction, external force damage prevention, and circuit stability. Adding high-purity ultrafine and nano silica in epoxy encapsulated electronic materials at an amount of 70-90% or more can make them have excellent processability, low shrinkage, low thermal expansion coefficient, acid and alkali resistance, and good solvent insulation properties.