What is Bismuth Sulfide?
Bismuth Sulfide
Bismuth Sulfide (Bismuth sulfide-based additive) for IR Shielding Coatings and Optical Black Coatings, with controlled inorganic particle morphology.
Technical owner: Aurexene Materials Engineering Team · Last updated: 2026-07-25
What It Is Not
- Bismuth Sulfide is not bismuth oxide or elemental bismuth; its chemical identity is Bi2S3.
When Not to Use It
- Do not use Bismuth Sulfide when oxide chemistry, optical transparency, or sulfur-free processing is mandatory.
Intrinsic Screening Summary
- Identity screen
- Bismuth sulfide-based additive; Controlled inorganic particle morphology
- Intrinsic feature
- The article reports Bi2S3 nanoflower structures with near-infrared laser absorption and measured photothermal conversion efficiency, supporting bismuth sulfide photothermal behavior.
- Material-level integration
- Use when evaluating IR Shielding Coatings / Optical Black Coatings formulations or systems.
Application Fit
Material Identity & Specification Status
Approved values for Particle size, Purity, and Packaging are not published; confirm them during quotation or sample review.
| Property | Value |
|---|---|
| Composition | Bismuth sulfide-based additive |
| CAS / identity | 1345-07-9 |
| Morphology | Controlled inorganic particle morphology |
| Density | 6.78 g/cm3 intrinsic density |
| Storage | Dry sealed container |
Why It Works
| Structure | Function | Mechanism |
|---|---|---|
| Bismuth Sulfide supports IR Shielding Coatings, Optical Black Coatings. | The article reports Bi2S3 nanoflower structures with near-infrared laser absorption and measured photothermal conversion efficiency, supporting bismuth sulfide photothermal behavior. |
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Technical Guides
| Technical Guide | Summary |
|---|---|
| Absorption vs Reflection in Solar-Control Coatings and Why the Difference Affects Heat Build-Up | Solar-control attenuation can come from absorption, reflection, or scattering. |
| Cure Temperature, Solvent Release, and Film Formation in NIR-Control Coatings | A usable cure profile lets solvent and air escape, allows the binder to level or coalesce, and develops the required network before settling, migration, skinning, bubbles, voids, or heat-driven material changes damage the coating. |
| Diagnosing Blue, Yellow, Brown, Gray, or Nonuniform Tint in NIR-Shielding Coatings | Tint is a symptom, not a unique material diagnosis. |
| How Coating Thickness and Particle Loading Control VLT, Haze, and NIR Rejection | Thickness and particle loading jointly set optical path and active material per area, but loading also changes particle spacing, dispersion, rheology, and defects, so VLT, haze, and NIR response require a two-variable film map rather than a single universal recipe. |
| How Phase Purity and Stoichiometry Change the Optical Response of NIR-Shielding Powders | Nominal formula does not fix an NIR powder's optical response. |
Documents & Inquiry
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Technical Data Sheet
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Safety Data Sheet
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Grade, Sample & Qualification Support
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