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
Selection & Validation Framework
| Decision Question | Material-Level Answer |
|---|---|
| Integration and processing criteria | Required for: IR Shielding Coatings and Optical Black Coatings. Measure: visible transmission; haze; color coordinates; NIR transmission; particle distribution; settling; redispersion; adhesion; film continuity; aging durability; storage stability; moisture exposure. Sample state: final coating thickness. Failure signals: Use when evaluating IR Shielding Coatings / Optical Black Coatings formulations or systems.. |
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. |
Commercial Availability
Supplier role: Request confirmation
Supply status: Request confirmation
Sample status: Sample availability requires confirmation
Commercial details are not published until the source and verification fields are complete and the Supplier Data Packet is signed by the sales owner, technical reviewer, and resource/compliance owner. Request current grade, form, sample, packaging, and delivery confirmation.
Documents & Inquiry
Document access follows the current approval state. Unapproved or unavailable files route to a document request instead of a public download.
Technical Data Sheet
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Safety Data Sheet
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Grade, Sample & Qualification Support
The Aurexene Materials Engineering Team can review the required form, host system, formulation or process, target, sample quantity, volume and timeline, and the grade-specific evidence needed before qualification.
Review Lab Capabilities for sample evaluation and qualification support, or Production Capabilities for scale-up, quality, documentation, and supply support.
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