Industrial Grade Talc Powder from China Suppliers - High-Quality Factory Production for Various Applications
Chemical Composition Specifications
| Chemical Component | Typical Content | Description |
|---|---|---|
| SiO2 | 58% - 63% | Main silicate component |
| MgO | 28% - 32% | Main magnesium component |
| Al2O3 | 0.5% - 2.0% | Controlled impurity |
| Fe2O3 | ≤ 1.0% | Affects whiteness and color |
| CaO | ≤ 2.0% | Minor component |
| K2O + Na2O | ≤ 1.0% | Minor alkali components |
| Loss on Ignition | 4% - 7% | Related to hydroxyl and mineral structure |
Frequently Asked Questions (FAQ)
What are the primary constituents in this mineral specification?
The dominant components are Silicon Dioxide (SiO2) at 58% - 63% and Magnesium Oxide (MgO) at 28% - 32%, representing the core structural elements of the magnesium silicate matrix.
Why is Fe2O3 maintained at or below 1.0%?
Iron oxide (Fe2O3) directly influences optical performance. Keeping levels ≤ 1.0% ensures high whiteness, color purity, and prevents unwanted discoloration in sensitive applications.
What does the "Loss on Ignition" (4% - 7%) indicate?
Loss on Ignition measures the release of chemically bound hydroxyl groups (structural moisture) and minor volatile components when heated to elevated temperatures.
How are impurity levels such as Al2O3 and CaO regulated?
Both Aluminum Oxide (0.5% - 2.0%) and Calcium Oxide (≤ 2.0%) are strictly controlled to maintain optimal chemical inertness and mineral consistency.
What is the tolerance for alkali components (K2O + Na2O)?
The combined alkali content of Potassium Oxide and Sodium Oxide is limited to ≤ 1.0%, supporting thermal and electrical stability.
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