Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of colloidal silica for investment 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 for investment casting for sale here from our factory.
Colloidal Silica for Investment 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.
Match the Grade to the Shell-Building Stage
PC10 for Backup Layers
The published backup-layer grade contains 27±1% SiO₂ with an 8–15 nm particle-size range.
PC20 for Face Coats
The published face-coat grade contains 30±1% SiO₂ with a 10–20 nm particle-size range.
Slurry Compatibility
Both grades use a published pH range of 9.5–10.5. Validate compatibility with the refractory flour and additives.
Test the Complete Shell System
Evaluate viscosity, wetting, drying behavior, green strength, fired strength and casting surface quality.
Information Needed for Investment Casting Evaluation
Provide the shell-building stage, refractory system and operating conditions so PC10 or PC20 can be evaluated in the actual slurry process.
- Shell stage: specify face coat, transition layer, backup layer or comparative 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 green strength, fired strength, permeability and surface requirements.
- Quality requirements: include analytical methods, certificate requirements and acceptance limits.
- Order details: provide trial quantity, annual demand, packaging and destination country.
Request Colloidal Silica for an Investment Casting Trial
Send the shell stage, refractory system, slurry conditions, casting alloy, 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 Investment Casting Questions
Which colloidal silica grades are available for investment casting?
The published investment casting grades are PC10 and PC20.
Which grade is used for face coats and backup layers?
PC20 is the published face-coat grade, while PC10 is the published backup-layer grade. Confirm suitability through slurry and shell trials.
What process information is needed for grade selection?
Provide the shell stage, refractory materials, slurry controls, drying cycle, firing conditions, alloy and required surface 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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How Colloidal Silica Is Used in Investment Casting
PC10 and PC20 are evaluated as inorganic binders in compatible ceramic shell systems. Selection depends on the shell layer, refractory, slurry controls and casting requirements.
Backup Layer Slurries
PC10 is the published grade for backup layers in compatible ceramic shell-building systems.
Primary Face-Coat Slurries
PC20 is the published grade for face-coat slurry formulations requiring controlled silica content and particle size.
Ceramic Shell Binding
Evaluated as an inorganic binder for building shell strength across compatible slurry and stucco layers.
Slurry Process Control
Grade trials should monitor viscosity, solids, wetting, drainage, drying and slurry stability over time.
Precision Alloy Castings
Shell systems can be qualified according to alloy temperature, dimensional requirements and surface-finish targets.
Foundry Process Trials
Comparative PC10 and PC20 trials can use the foundry's actual refractory materials, drying cycle and firing conditions.
