LiSi — Properties & Data | MatWorld

LiSi

ceramic

· LiSi

LiSi is a lithium silicate ceramic compound that combines lithium with silicon to form a lightweight, brittle ceramic material. It is primarily investigated in research contexts for applications requiring low density and high stiffness, particularly in aerospace and advanced composites where weight reduction is critical. Compared to conventional structural ceramics, lithium silicates offer potential advantages in thermal management and as precursors for glass-ceramic processing, though commercial deployment remains limited and the material is generally considered experimental or specialized rather than a commodity engineering ceramic.

aerospace structureslightweight compositesglass-ceramic precursorsthermal managementresearch applicationsadvanced ceramics development

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	52.04	GPa	DFT
↳	13.38	GPa	DFT · OptB88vdW
↳	52.04	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.4504	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.07000	-	DFT · OptB88vdW
↳	0.2296	-	DFT · PBE
Shear Modulus(G)3 entries	34.34	GPa	DFT
↳	1.810	GPa	DFT · OptB88vdW
↳	34.34	GPa	DFT · PBE

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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Property	Value	Unit	Conditions	Source
Density(ρ)	1.569	kg/m³	DFT · OptB88vdW

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.1610	eV	DFT · OptB88vdW
↳	0.4710	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	20.15	-	DFT · OptB88vdW
↳	17.77	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	13.72	%	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.1309	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.06465	eV/atom	DFT · OptB88vdW

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

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.

LiSi

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental