Silicon Element: Particle Size 1-10 μm, Purity ≥99.9%

Q: Why is high purity critical for silicon in MoSi2 production?

High purity (≥99.9%) ensures minimal impurity phases that could degrade the oxidation resistance and mechanical properties of MoSi2 at elevated temperatures.

Q: What particle size range is optimal for silicon in MoSi2 synthesis?

1-10 μm particle size provides optimal reactivity with molybdenum while maintaining good flow characteristics for powder processing.

Component Specifications

Definition

Silicon (Si) is a metalloid element with atomic number 14, serving as the primary silicon source in high-purity molybdenum disilicide (MoSi2) powder manufacturing. In this context, silicon is processed to achieve purity levels exceeding 99.9% and combined with molybdenum through powder metallurgy techniques to create MoSi2, which exhibits exceptional oxidation resistance and stability at temperatures up to 1700°C.

Working Principle

Silicon atoms bond with molybdenum atoms in a 2:1 stoichiometric ratio to form molybdenum disilicide (MoSi2) through high-temperature synthesis. The silicon provides the necessary silicon content for creating the protective silica (SiO2) layer that forms on MoSi2 surfaces at elevated temperatures, enabling its use as heating elements in industrial furnaces.

Materials

High-purity silicon (≥99.9% Si) with controlled particle size distribution (typically 1-10 μm), low oxygen content (<0.1%), and minimal metallic impurities (Fe, Al, Ca < 100 ppm each).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Purity	≥99.9%
Bulk Density	0.8-1.2 g/cm³
Particle Size	1-10 μm
Oxygen Content	<0.1%
Metallic Impurities	<100 ppm each
Specific Surface Area	2-5 m²/g

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 4497, ASTM B214, DIN 66165

Parent Products

This component is used in the following industrial products

High-Purity Molybdenum Disilicide Powder

Ultra-fine refractory metal silicide powder for high-temperature industrial applications.

View Product Details

Engineering Analysis

Risks & Mitigation

Silicon dust explosion hazard during handling
Moisture absorption affecting powder properties
Impurity contamination during processing

FMEA Triads

Trigger: Inadequate purity control during silicon refining
Failure: Reduced oxidation resistance of MoSi2 heating elements
Mitigation: Implement strict incoming material inspection with ICP-OES analysis

Trigger: Improper particle size distribution
Failure: Incomplete reaction with molybdenum during synthesis
Mitigation: Use laser diffraction particle size analysis with real-time feedback control

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% on silicon content, ±1 μm on particle size D50

Test Method

ICP-OES for purity, laser diffraction for particle size, BET for surface area

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

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Frequently Asked Questions

Why is high purity critical for silicon in MoSi2 production?