Silica-Coated Titanium Dioxide (SiO2@TiO2)
SiO2@TiO2 powder wraps photocatalytically active rutile titania in an inert silica shell, keeping the pigment's high refractive index and whiteness while suppressing the UV-driven activity that degrades paint binders and polymers.
Tunable shellCoating Content
20-40 nmParticle Size Range
Custom Made-to-OrderGrade, Size & Quantity
WorldwideExport Shipping
Silica-Coated Titanium Dioxide — Grades & Specifications
Silica-Coated Titanium Dioxide (SiO2@TiO2) powder is supplied across a range of grades, particle sizes and coating ratios. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Silica-Coated Titanium Dioxide (SiO2@TiO2) |
|---|---|
| Category | Ceramic/Oxide-Coated Powder |
| Core material | Titanium dioxide (rutile) (CAS 13463-67-7) |
| Coating / shell material | Silicon dioxide (silica) (CAS 7631-86-9) |
| Coating content | Shell thickness is tunable via sol-gel deposition; exact commercial wt% varies by grade and is confirmed on request |
| Particle size | Approximately 20-40 nm on nanopowder grade; larger pigment-grade material is also available for coatings and plastics |
| Morphology | Near-spherical core-shell nanoparticles |
| Appearance | White powder |
| Photocatalytic Suppression | Silica encapsulation markedly suppresses TiO2's intrinsic photocatalytic activity and improves water dispersibility versus uncoated TiO2, reducing UV-driven degradation of surrounding binders |
| Typical applications | UV-Stable Exterior Coatings, Cosmetic & Sunscreen Formulations, Plastics & Masterbatch Whitening, Photocatalysis-Controlled Composites |
Applications by Industry
UV-Stable Exterior CoatingsReduces photocatalytic chalking and degradation of paint binders caused by bare TiO2.
Cosmetic & Sunscreen FormulationsPhotostable white pigment and UV filter with reduced free-radical generation on skin.
Plastics & Masterbatch WhiteningPigment that resists polymer photodegradation such as yellowing and embrittlement under UV.
Photocatalysis-Controlled CompositesUsed where TiO2's optical and refractive benefits are wanted without unwanted photoactivity.
Printing Inks & Paper CoatingsBright white opacifying pigment with improved dispersibility.
Anti-Yellowing Architectural PaintsSupports long-term exterior durability in architectural coating applications.
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade or type
- Particle size (micron or mesh)
- Coating content / core-shell ratio
- Quantity
- Application environment
- Required delivery country
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What is the coating content of Silica-Coated Titanium Dioxide?
Shell thickness is tunable via sol-gel deposition; exact commercial wt% varies by grade and is confirmed on request Other coating ratios can be reviewed on request depending on your application and quantity.
What particle sizes can you supply?
Approximately 20-40 nm on nanopowder grade; larger pigment-grade material is also available for coatings and plastics Mesh-based requirements are also accepted; a mesh-to-micron conversion reference is provided on the page.
Can Silica-Coated Titanium Dioxide be made to custom specifications?
Yes. Silica-Coated Titanium Dioxide is produced to order — core/shell ratio, particle size, morphology and packaging can be customized to your specification. Select “Custom Order” in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship Silica-Coated Titanium Dioxide internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots.
Related Products
Request a Quote for Silica-Coated Titanium Dioxide
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.