B4C — Properties & Data | MatWorld

B4C

semiconductor

· B4C

Boron carbide (B₄C) is a hard ceramic compound belonging to the non-oxide ceramics family, known for its extreme hardness and chemical stability at high temperatures. It is widely used in abrasive applications, armor systems, and nuclear shielding, where its exceptional hardness and low density make it preferable to traditional alternatives like silicon carbide or tungsten carbide. Engineers select B₄C for applications requiring wear resistance combined with lightweight construction, particularly in ballistic protection and precision grinding where cost-performance balance is critical.

ballistic armor platesabrasive grinding medianuclear reactor control rodswear-resistant nozzlescutting tool compositeshigh-temperature structural ceramics

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	228.0	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1900	-	DFT · OptB88vdW
Shear Modulus(G)	182.8	GPa	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Thermal Conductivity(k)	30.00	W/(m·K)	Measured

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	2.472	kg/m³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions	Source
Band Gap(Eg)3 entries	1.640	eV	Measured
↳	1.660	eV	DFT · OptB88vdW
↳	2.160	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.465	-	DFT · OptB88vdW
↳	7.867	-	DFT · TBmBJ
Electron Effective Mass(m*e)	1.760	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.053	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00225	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00350	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-364.8	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	331.5	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	19.57	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Method

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.03690	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.05383	eV/atom	DFT · OptB88vdW
↳	-0.1299	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.