Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of investment casting 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 investment casting colloidal silica for sale here from our factory.
Investment Casting Colloidal Silica 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.
Compare PC10 and PC20 Technical Profiles
PC10
Specified with an 8–15 nm particle-size range and Na₂O content no higher than 0.4%.
PC20
Specified with a 10–20 nm particle-size range and Na₂O content no higher than 0.4%.
Common Alkaline Range
Both published grades share the same pH specification for incoming-quality comparison.
Published Shelf Life
Both PC10 and PC20 have a published shelf life of at least 12 months under suitable storage conditions.
Information Needed for Grade Evaluation
Provide the slurry system, process conditions and acceptance criteria required for a relevant PC grade recommendation.
- Grade requirement: confirm PC10, PC20 or request comparative sample testing.
- Slurry composition: provide refractory flour, stucco and other formulation components.
- Process conditions: include mixing, viscosity control, temperature and drying parameters.
- 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 a PC Grade Sample and Quote
Send the required grade, slurry formulation, process conditions, 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.
Investment Casting Colloidal Silica Purchasing Questions
Which PC grades are available?
The published investment casting grades are PC10 and PC20.
How do PC10 and PC20 differ?
PC10 contains 27±1% SiO₂ with 8–15 nm particles; PC20 contains 30±1% SiO₂ with 10–20 nm particles.
What is the Na₂O limit?
Both PC10 and PC20 have a published Na₂O limit of no more than 0.4%.
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 Investment Casting Colloidal Silica
PC10 and PC20 are designed for compatible investment casting shell systems. Qualification should use the actual refractory, slurry-control method, drying cycle and casting alloy.
Backup Shell Layers
PC10 is the published grade for backup layers in compatible ceramic shell-building systems.
Primary Face Coats
PC20 is the published grade for face-coat slurry formulations requiring controlled silica content and particle size.
Precision Metal Castings
Evaluated as an inorganic binder in shell processes for dimensionally controlled cast components.
Stainless Steel Castings
Suitable for foundry trials after refractory compatibility, shell strength and firing conditions are validated.
Alloy Casting Components
Can be assessed in compatible shell systems based on alloy temperature and required surface finish.
Custom Ceramic Shell Systems
Supports process trials involving specific refractory materials, slurry parameters and drying cycles.
