Dry silica powders
For carrier selection and formulation control where validated powder handling is available.
Formulation applications
In coatings, composites and CMP research, interface behavior can dominate nominal size.
Silica particles are investigated as fillers, rheology modifiers, reinforcement, optical modifiers, surface-texture agents and abrasive components. Suitability depends on purity, morphology, surface, matrix compatibility, loading and dispersion process.
| Application | Primary design inputs | Critical qualification |
|---|---|---|
| Coatings | Particle size, loading, transparency/haze, surface and binder compatibility | Dispersion, film defects, optical response and durability |
| Polymer composites | Surface coupling, matrix, viscosity, mixing and cure | Agglomeration, interface strength and final properties |
| CMP research | Size distribution, hardness, purity, surface chemistry, slurry chemistry | Removal rate, selectivity, defects, scratches and contamination |
| Sol-gel / ceramic research | Precursor compatibility, solids, porosity and thermal process | Shrinkage, phase evolution and final microstructure |
| Adhesives / sealants | Rheology, surface treatment, loading and cure | Viscosity, bond performance and shelf stability |
Surface engineering
Native silica is not always compatible with the matrix.
Native silica surfaces are often hydrophilic. Hydrophobic treatment, amine functionality or polymer coatings can improve compatibility for specific matrices or enable further coupling. Functionalization can also change particle size, zeta potential, density, optical response and storage behavior.
Development protocol
Screen the complete formulation window.
- Define particle size, distribution and surface evidence
- Select matrix-compatible carrier and functionalization
- Establish addition order and mixing energy
- Measure viscosity and dispersion at multiple loadings
- Inspect agglomeration and defects
- Test application-specific performance
- Run aging, temperature and storage studies
- Control contamination and lot changes
Applied Physics materials
Evaluate native, dry and functionalized pathways.
Hydrophobic silica
For matrix-compatibility screening where a hydrophobic surface is technically justified.
Polymer-coated silica
For controlled evaluation of coated-particle behavior.
Questions engineers ask
Frequently asked questions
Can calibration-grade silica automatically be used in CMP slurry?
No. CMP performance requires formulation-specific purity, surface, particle size, defectivity, chemistry and process validation not established by a general particle certificate.
Why functionalize silica for composites?
Surface modification can change wetting, coupling, dispersion and interface behavior, but the correct chemistry depends on the matrix and process.
Sources and verification
Technical basis
- Applied Physics dry silica — Commercial dry-powder pathway.
- Applied Physics hydrophobic silica — Current surface-modified product pathway.
- Bangs silica technical library — Industry technical resources on silica chemistry and handling.
Commercial specifications should be confirmed against the current Applied Physics quotation, certificate, lot documentation and product page before purchase or protocol use.
Continue the research
Related technical guidance
Functionalized silica
Compare hydrophobic, amine and polymer-coated options.
Aggregation
Control formulation defects.
Dry powder vs. suspension
Choose the starting format.
Applied Physics technical pathway
Need a particle specification reviewed?
Send the target size, medium, concentration, application, certificate requirements and shipping destination. Applied Physics can evaluate the appropriate silica family or custom pathway.