Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of foundry grade colloidal silica in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy durable foundry grade colloidal silica for sale here from our factory.
Foundry Grade Colloidal Silica Comparison
| Model | SiO₂ Content | Particle Size | Na₂O Content | pH | Shelf Life |
|---|---|---|---|---|---|
| PC10 | 27±1% | 8–15 nm | ≤0.4% | 9.5–10.5 | ≥12 months |
| PC20 | 30±1% | 10–20 nm | ≤0.4% | 9.5–10.5 | ≥12 months |
Values are published technical specifications. Confirm the test method, batch certificate and final acceptance limits before ordering.
Evaluate the Binder Across the Complete Shell Process
PC10 for Backup Layers
PC10 is the published backup-layer direction, with 27±1% SiO₂ and an 8–15 nm particle-size range.
PC20 for Primary Face Coats
PC20 is the published face-coat direction, with 30±1% SiO₂ and a 10–20 nm particle-size range.
Binder–Refractory Compatibility
Both grades use a published pH range of 9.5–10.5. Test wetting and stability with the selected refractory system.
Verify Strength and Drying Behavior
Binder qualification should cover slurry life, drying, intercoat adhesion, green strength, fired strength and permeability.
Information Needed for Casting Binder Evaluation
Provide the casting process, ceramic shell layer, refractory system and performance targets so PC10 or PC20 can be evaluated under actual foundry conditions.
- Binder function: specify face coat, transition layer, backup layer or comparative binder testing.
- Refractory system: identify the flour, stucco, additives and other formulation components.
- Process conditions: include slurry solids, mixing, viscosity control, drying cycle and firing conditions.
- Performance targets: define slurry life, drying time, adhesion, green strength, fired strength and permeability.
- Quality requirements: include analytical methods, certificate requirements and acceptance limits.
- Order details: provide trial quantity, annual demand, packaging and destination country.
Request a Colloidal Silica Casting Binder Trial
Send the binder function, refractory system, slurry controls, shell-performance targets and required quantity.
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.
Foundry Grade Colloidal Silica Questions
Which foundry grade colloidal silica products are available?
The published investment casting grades are PC10 and PC20.
How are PC10 and PC20 used in foundry shell systems?
PC20 is the published face-coat grade, while PC10 is the published backup-layer grade. Confirm suitability through slurry and shell trials.
Which binder performance factors should be tested?
Test slurry stability, wetting, drainage, drying, intercoat adhesion, green strength, fired strength, permeability and casting finish.
What is the published pH range?
The published pH range for both grades is 9.5–10.5.
How should these grades be stored?
Store them at 0–40°C, prevent freezing and direct sunlight, and keep containers closed.
Hot Tags: foundry grade colloidal silica, China foundry grade colloidal silica manufacturers, suppliers, factory
Applications of Foundry Grade Colloidal Silica
PC10 and PC20 are foundry-grade inorganic binder directions for compatible ceramic shell systems. Qualification should use the actual refractory materials, slurry controls, drying cycle, firing and casting alloy.
Backup Shell Binding
PC10 can be evaluated as the binder direction for compatible backup slurry and stucco layers.
Face-Coat Binding
PC20 can be evaluated in compatible primary face-coat slurry systems requiring controlled binder parameters.
Intercoat Adhesion
Binder trials can assess adhesion and integrity between successive ceramic shell layers.
Slurry Stability
Monitor viscosity, solids, wetting, drainage and stability during the intended working period.
Green and Fired Strength
Evaluate whether the binder system supports handling strength and fired-shell requirements without unacceptable cracking.
Foundry Process Trials
Comparative trials should use the actual refractory, additives, drying cycle, firing conditions and casting alloy.
