Atomfair Beta Silicon Carbide Powder (3C-SiC), >99% Purity, D50 22.6 μm – Thermal Conductivity and Microwave Absorption
Product Description
Atomfair beta Silicon Carbide Powder (3C-SiC) is supplied with >99% purity, D50 22.6 μm particle size, and a cubic beta-SiC (3C-SiC) crystal structure. It is intended for thermal-conductive fillers, microwave-absorbing materials, and dielectric or insulation materials research.
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Technical Specifications
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Customization & Ordering
Custom particle-size and purity requirements may be evaluated for selected
grades upon request. Alternative package sizes may also be available.
Minimum order quantities, pricing, and lead times vary by specification and
will be confirmed during technical review and quotation.
Key Features and Advantages
- Defined >99% purity grade with D50 22.6 μm particle size.
- Complete-crystal, low-defect cubic beta-SiC powder format with high density.
- Low oil-absorption behavior with tunable dielectric performance for functional filler evaluation.
APPLICATION SCOPE: thermal-conductive fillers, microwave-absorbing materials, and dielectric or insulation materials research
DOCUMENTATION: COA and SDS can be provided upon request for batch-specific confirmation. Additional documentation requirements may be discussed before order confirmation.
LABORATORY PROCUREMENT SUPPORT
For grade selection, particle-size confirmation, documentation support or custom specification review, contact our technical sales team.
What is the advantage of the cubic beta-SiC (3C-SiC) crystal structure over alpha-SiC for thermal conductivity and microwave absorption applications?
The cubic beta-SiC (3C-SiC) phase provides a low-defect, high-density powder with tunable dielectric performance, as specified by the >99% purity, D50 22.6 μm particle size, and tap density of 1.76 g/cm³. This crystal structure is specifically optimized for thermal-conductive fillers and microwave-absorbing materials research, where complete crystallinity and low defect density minimize phonon scattering and dielectric loss.
What are the key impurity levels in this beta silicon carbide powder and how do they affect its performance in dielectric or thermal interface materials?
The powder contains Fe₂O₃ <0.08%, SiO₂ <0.1%, F.Si <0.1%, and F.C <0.05%, with overall purity >99%. These low impurity levels are critical for maintaining high thermal conductivity and stable dielectric properties in composite formulations, as contaminants can introduce parasitic losses and degrade insulation resistance in functional filler applications.
What particle size distribution and tap density specifications should be considered when processing this beta-SiC powder into polymer composite fillers?
The particle size distribution is D10 14.7 μm, D50 22.6 μm, D90 35 μm, and D97 ≤42.7 μm, with a tap density of 1.76 g/cm³. This narrow, well-graded distribution and moderate tap density support uniform dispersion and high packing density in polymer matrices, which is essential for achieving consistent thermal and dielectric performance in composite materials.
Atomfair 3C-SiC powder is a >99% pure cubic beta-silicon-carbide grade with D50 22.6 μm and a defined D10/D90/D97 particle-size profile, relevant to thermally conductive filler, microwave-absorbing, and dielectric/insulation research. Its coarse median particle size and batch-specific trace impurity levels are the primary constraints a laboratory must verify before deployment.
Positive
- Defined cubic 3C-SiC phase and particle grading: The powder is specified as cubic beta-SiC with >99% purity, D50 22.6 μm, D10 14.7 μm, D90 35 μm, and D97 ≤42.7 μm, providing a reproducible particle-size baseline for thermal-filler and dielectric formulation studies.
- Low oil absorption and dense filler format: The supplier cites a complete-crystal, low-defect lattice with high density, a tap density of 1.76 g/cm³, low oil absorption, and tunable dielectric performance, properties relevant to high-loading functional-filler evaluations.
Trade-offs
- Trace iron and silica impurities specified: The impurity profile permits Fe₂O₃ below 0.08%, SiO₂ below 0.1%, free silicon below 0.1%, and free carbon below 0.05%; users with strict dielectric purity requirements should confirm batch-specific values via the available COA.
- Coarse 22.6 μm median particle size: With D50 of 22.6 μm and D97 up to 42.7 μm, this is a coarse powder grade; applications requiring finer or custom particle-size distributions must rely on the supplier's on-request evaluation and technical-review confirmation.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
