Expanded Vermiculite from China - Lightweight Insulation Material by Leading Suppliers and Factory
Chemical Composition & Specifications
| Chemical Component | Typical Content | Description |
|---|---|---|
| SiO2 | 35% - 45% | Main silicate component |
| MgO | 20% - 30% | Typical vermiculite component |
| Al2O3 | 8% - 16% | Alumina component |
| Fe2O3 | 5% - 12% | Affects color and mineral characteristics |
| K2O | 3% - 8% | Interlayer alkali component |
| CaO | 1% - 5% | Minor component |
| TiO2 | 0.5% - 2% | Trace component |
| Loss on Ignition | Varies by grade | Related to water and expansion behavior |
Frequently Asked Questions
What are the primary chemical components of this material?
The primary constituents are Silicon Dioxide (SiO2) at 35%–45% and Magnesium Oxide (MgO) at 20%–30%, forming the core silicate structure typical of magnesium-aluminum-iron phyllosilicates.
How does Fe2O3 content influence the material's properties?
Iron oxide (Fe2O3), ranging between 5% and 12%, directly influences the natural color, golden-brown tint, and mineral stability across various thermal and industrial applications.
What does "Loss on Ignition" signify for this compound?
Loss on Ignition indicates the percentage of moisture and interlayer bound water released at elevated temperatures, which directly dictates the exfoliation and volumetric expansion ratio.
Why are K2O and CaO present in the chemical profile?
Potassium oxide (K2O) and Calcium oxide (CaO) act as interlayer alkali and minor components, contributing to the balance of electrostatic charges within the mineral's layered crystalline matrix.
Does the chemical composition remain consistent across all grades?
While the relative proportions of major oxides like SiO2 and MgO stay within stated standard tolerances, minor variations in trace elements and Loss on Ignition can occur depending on specific mineral grade and origin.
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