Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of colloidal silica for refractory in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy durable colloidal silica for refractory for sale here from our factory.
Colloidal Silica for Refractory Grade Comparison
| Model | Particle Size | SiO₂ Content | Na₂O Content | pH | Shelf Life |
|---|---|---|---|---|---|
| HC4010 | 10–15 nm | 40±1% | ≤0.4% | 9.5–10.5 | ≥12 months |
| HC4020 | 20–30 nm | 40±1% | ≤0.4% | 9.5–10.5 | ≥12 months |
| HC5020 | 20–30 nm | 50±1% | ≤0.4% | 9.5–10.5 | ≥12 months |
The listed HC grades are representative candidates for refractory binder evaluation, not universal replacements. Confirm refractory chemistry, water demand, setting behavior and high-temperature performance through trials.
Balance Solids, Particle Size and Processing
Fine-Particle 40% Grade
HC4010 combines 40±1% SiO₂ with 10–15 nm particles for formulation trials requiring finer nanosilica.
Larger-Particle 40% Grade
HC4020 maintains 40±1% SiO₂ with 20–30 nm particles for comparative packing and processing evaluation.
Higher-Solids 50% Grade
HC5020 provides 50±1% SiO₂ with 20–30 nm particles where reducing added liquid is a development target.
Test the Complete Refractory System
Verify workability, setting, drying, green strength, fired strength, thermal cycling and chemical compatibility.
Information Needed for Refractory Grade Evaluation
Define the refractory composition, installation method and temperature conditions before selecting a colloidal silica binder candidate.
- Refractory system: identify aggregates, fines, cement content, additives and target chemistry.
- Installation method: specify castable, gunning, pumping, ramming, coating or another process.
- Binder requirement: provide the target SiO₂ content, particle size, sodium limit and addition rate.
- Performance targets: state working time, setting, drying, strength, permeability and service temperature.
- Quality requirements: provide the test method, certificate requirements and acceptance limits.
- Order details: include trial quantity, annual demand, packaging and destination country.
Request Colloidal Silica for a Refractory Trial
Send the refractory composition, installation method, service temperature, binder targets, trial quantity and annual demand.
Request a Grade RecommendationProtect Product Stability During Storage
Packaging Options
Available polyethylene packaging sizes are 25 kg, 250 kg and 1000 kg.
Storage Temperature
Store at 0–40°C and protect from freezing. Temperatures below 0°C can cause irreversible gelation.
Direct Sunlight
Avoid prolonged exposure to direct sunlight during storage and transportation.
Container Closure
Keep containers closed to limit water evaporation and precipitation of solid silica particles.
Colloidal Silica for Refractory Questions
Which colloidal silica grades can be evaluated for refractory binders?
Representative high-solids candidates include HC4010, HC4020 and HC5020. Final selection depends on the complete refractory formulation.
Why use colloidal silica in refractory formulations?
It can be evaluated as an aqueous inorganic binder that forms a silica network after drying. Actual performance depends on formulation and curing conditions.
Which properties should be tested?
Test workability, setting time, drying behavior, green and fired strength, permeability, thermal cycling and chemical compatibility.
Can particle size be customized?
Yes. Particle size is identified as customizable and should be confirmed with the target value, tolerance and test method.
How should colloidal silica for refractory use be stored?
Store it at 0–40°C, prevent freezing and direct sunlight, and keep the container closed.
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Applications of Colloidal Silica for Refractory
Colloidal silica can be evaluated as an aqueous inorganic binder in refractory systems. Grade qualification must use the actual raw materials, installation method, curing schedule and service conditions.
Refractory Castables
Evaluated as a binder in compatible castable systems after workability, setting and strength are verified.
Refractory Coatings
Suitable grades can be tested in heat-resistant coating and surface-protection formulations.
Gunning and Pumping Mixes
Binder candidates can be qualified for rheology, delivery stability, rebound and installed density.
Precast Refractory Shapes
Evaluated where controlled molding, drying and fired properties are required in compatible precast formulations.
High-Temperature Repair Materials
Can be assessed in compatible repair mixes after adhesion, drying shrinkage and thermal cycling are validated.
Custom Refractory Development
Supports trials requiring selected silica solids, particle size, pH, alkali limit and binder addition rate.
