Neutral silica sol product specifications typically cover key indicators such as appearance, SiO₂ content, particle size, pH value, purity (e.g., metal impurity content), density, viscosity, and shelf life. Different manufacturers and models may have variations in these indicators to meet the needs of different industries and applications.
ZS-type neutral silica sol is a high-purity product specifically designed for pH-sensitive industries (such as high-grade coatings, non-stick coatings, and papermaking). Typical models include ZS-20, ZS-25, and ZS-30. Its key performance indicators include: appearance as a slightly milky white transparent liquid; Na₂O content ≤0.2%; SiO₂ content 20±1%, 25±1%, and 30±1% respectively; density (20℃) 1.12-1.14 g/cm³, 1.15-1.17 g/cm³, and 1.19-1.21 g/cm³ respectively; pH value 6.5-8.0; viscosity ≤10 mPas; particle size 8-15 nm; and shelf life of one year.
SK-30 neutral silica sol ND-0201 is manufactured by Suzhou Nadi Microelectronics Co., Ltd., under the brand name Nadi. This product is characterized by high purity, with all metal impurities except K and Na ions. Technical parameters include SiO₂ content of 29.0%~30.6%, adjustable average particle size of 20~30 nm, pH value of 7~8, specific gravity of 1.17~1.20, and a stability period of over one year. Furthermore, according to specific customer requirements, the SiO₂ content can exceed 40%, and the average particle size can be controlled within a certain range.
According to industry reports (such as QYResearch), neutral silica sol products are mainly divided into three categories based on particle size: 60 nanometers and above.