PYRAX® RG 140 Pyrophyllite
- Chemical Name
- Kaolin, Pyrophyllite (AlH(SiO3)2), Quartz (SiO2)
PYRAX® RG-140 Pyrophyllite is a unique natural mixture of platy silicates, principally pyrophyllite, and quartz ground to 140 mesh. It has low bulk density, low thermal conductivity, and low reversible thermal expansion. PYRAX RG 140 is used in mold washes to prevent metal penetration into the mold. In insulating firebrick, PYRAX RG 140 provides excellent dimensional stability and is used to make refractories with superior hot load bearing ability, resistance to thermal shock and a low coefficient of thermal expansion. In abrasive products, PYRAX RG 140 is used in vibratory millstones, bonded wheels and polishing compounds.
Properties
- Physical Form
- Powder
- Solid
Product families
Applications
- Ceramics & Refractory
Product Families
- Glass & Ceramic Additives
Other characteristics
- Brand
- PYRAX
- End Uses
Castable Refractories, Catalytic Converter Carriers, Ceramic Filters, Ceramics, Foundry Washes, Gunning Refractories, Insulating Firebrick, Kiln Car Refractories, Metal Pouring Refractories, Monolithic Refractories, Ramming Refractories, Refractory Materials
- Features
Corrosion Resistance, Excellent Heat Stability, High Mechanical Properties, Improved Compressive Strength, Improved Dimensional Stability, Improved Flexural Strength, Improved Hardness, Low Bulk Density, Low Thermal Conductivity, Thermal Shock Resistance
- Grade
- Refractory Grade
- Markets
- Industrial
- Appearance
- Off-white to gray powder
- Technology
- Industrial Additives & Materials
- Chemical Inventories
- AICS (Australia)
- CICR (Turkey)
- DSL (Canada)
- EEC/EU
- EHS (Malaysia)
- ENCS (Japan)
- IECSC (China)
- ISHL (Japan)
- Industrial Additives End Use
- Castable Refractories
- Catalytic Converter Carriers
- Ceramic Filters
- Ceramics
- Foundry Washes
- Gunning Refractories
- Insulating Firebrick
- Kiln Car Refractories
- Industrial Additives Features
- Corrosion Resistance
- Excellent Heat Stability
- High Mechanical Properties
- Improved Compressive Strength
- Improved Dimensional Stability
- Improved Flexural Strength
- Improved Hardness
- Low Bulk Density
Technical data
Table 1 of 2
9 rows| Characteristic | Value | Unit |
|---|---|---|
| Silicon Dioxide | 71.5 | % |
| Aluminum Oxide | 20.8 | % |
| Iron Oxide | 1.9 | % |
| Magnesium Oxide | 0.1 | % |
| Calcium Oxide | 0.1 | % |
| Sodium Oxide | 0.4 | % |
| Potassium Oxide | 0.3 | % |
| Titanium Dioxide | 0.5 | % |
| Ignition Loss | 4.0 | % |
Table 2 of 2
9 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| PCE | 27 - 28 | — | ASTM C-24 |
| Brightness (Fired) | min. 55 | — | T-898 |
| Expansion/Shrinkage | -2 - 2.5 | % | T-897 |
| Fineness (retained on 200 mesh) | 5 - 10 | % | T-957 |
| Moisture Content | max. 0.5 | % | T-936 |
| Screen Number (150 µm) | 1.0 | — | — |
| Screen Number (75 µm) | 14.0 | — | — |
| Screen Number (45 µm) | 21.5 | — | — |
| Compact Bulk Density | 61.0 | lbs/ft3 | — |
