Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of colloidal silica binder for casting 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 binder for casting for sale here from our factory.
Colloidal Silica Binder for Casting Grade 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 Backup Binder
PC10 is the published backup-layer direction, with 27±1% SiO₂ and an 8–15 nm particle-size range.
PC20 Face-Coat Binder
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 binder function, 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.
Colloidal Silica Binder for Casting Questions
Which colloidal silica binder grades are available for casting?
The published investment casting grades are PC10 and PC20.
How are PC10 and PC20 used as casting binders?
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.
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Applications of Colloidal Silica Binder for Casting
PC10 and PC20 act as inorganic binder directions for compatible ceramic shell systems. Qualification should connect binder properties with slurry control, drying and final shell performance.
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 Binder Trials
Comparative trials should use the actual refractory, additives, drying cycle, firing conditions and casting alloy.
