This comparison separates what the source archive boron arsenide dossier claims from what its cited evidence supports. Unlike the free-energy and over-unity dossiers elsewhere in this wiki, the BAs dossier rests on peer-reviewed literature and measurement — but it still mixes measured values, theoretical predictions, patent claims, and promotional video assertions, and these should not be treated as equivalent.
Thermal conductivity: measured values vs. a single headline number
| Claim | Source type | Evidence status |
|---|---|---|
| ~190 W/(m·K) | Wikipedia excerpt (early measurement) | Measured, attributed to high defect density |
| 900–1000 W/(m·K) | Wikipedia excerpt / Science 2018 | Measured in low-defect crystals |
| 1300 W/(m·K) | Wikipedia excerpt / arXiv preprint | Measured in defect-free crystals |
| ~1500 W/(m·K) | Advanced Science 2025 | Measured (TDTR) in isotope-enriched c-¹¹BAs |
| >2100 W/(m·K) | ScienceHubNet video summary | Assertion; not a measured value in the dossier |
The dossier presents these as a progression, but they come from different samples, methods, and groups and are not a single reconciled figure. The "exceeding two thousand one hundred watts per meter per Kelvin" figure appears only in the ScienceHubNet video summary and is not supported by a cited measurement in the dossier.
Theory vs. experiment
| Stage | Value (W/(m·K)) | Source |
|---|---|---|
| First-principles, three-phonon only | ~2200 | 2013 prediction / PRB |
| First-principles, with four-phonon | 1300–1400 | PRB four-phonon paper |
| Measured, defect-free | 1300 | Science 2018 / Wikipedia |
| Measured, isotope-enriched | ~1500 | Advanced Science 2025 |
The Advanced Science paper explicitly notes that the measured values exceeded the ab initio calculations — an unresolved theory–experiment gap, not a settled agreement.
Patent claims vs. measured data
| Claim | Source | Measured counterpart |
|---|---|---|
| Ambipolar mobility up to 10000 cm²/V·s | Patent US2023257907 | ~1600 cm²/V·s experimentally confirmed (Advanced Science) |
| Indirect-to-direct band gap via 0.12 tensile strain along [111] | Patent CN121653852 | No measurement reported in the dossier |
| BAs "easier and cheaper to produce than diamond" | ScienceHubNet video summary | No cost data provided |
Patent claims are not evidence of achieved performance. The mobility gap (up to 10000 vs. ~1600 cm²/V·s) is the clearest example in the dossier.
Isotope enrichment: contested
| Position | Source |
|---|---|
| Isotope enrichment raises conductivity to ~1500 W/(m·K) | Advanced Science 2025 |
| Prior studies found "only minimal differences" between isotope-enriched and natural c-BAs (1100–1300 W/(m·K) regardless of composition) | Advanced Science 2025 introduction, citing prior work |
The dossier presents both positions without resolving them. The 2025 authors attribute the earlier null results to impurity-dominated samples.
Source errors to flag
- Melting point inconsistency: the Wikipedia excerpt gives 1,100 °C (decomposes) in the infobox and 2076 °C in the prose.
- CN115321552 abstract mismatch: the abstract given for CN115321552 (boron arsenide nanocrystal by mechanochemical method) is a duplicate of CN115666100's heat-dissipation-structure text, not a nanocrystal-synthesis description.
Overall assessment
The dossier's scientific core — that BAs has ultrahigh thermal conductivity, that defects limited early measurements, and that four-phonon scattering reconciles theory with measurement — is supported by peer-reviewed papers and is a legitimate materials-science result. The dossier's weak points are the promotional video assertions (cost, >2100 W/(m·K)), the patent mobility claims far above measured values, and the unresolved isotope-enrichment disagreement. The dossier is a compilation, not an independent validation: no new measurement is reported by the source archive.
Related pages
- Boron Arsenide (BAs)
- Ultrahigh Thermal Conductivity in Boron Arsenide
- Ambipolar Mobility in Boron Arsenide
- Isotope Enrichment and Thermal Conductivity
- Four-Phonon Scattering
- Antisite Defects in Boron Arsenide
Source notes & attribution
- https://rexresearch.com/BoronArsenide/BoronArsenide.html