TiO2 — Properties & Data | MatWorld

TiO2

semiconductor

· TiO2

Titanium dioxide (TiO₂) is a wide-bandgap semiconductor ceramic widely used as a photocatalyst, pigment, and functional coating material. It is the dominant choice for UV-protective and self-cleaning applications due to its strong photocatalytic activity under UV and visible light, excellent chemical stability, and non-toxicity. Engineers select TiO₂ over alternatives when photocatalytic degradation of pollutants, UV absorption, or self-sterilizing surfaces are required; it is also favored in applications demanding high refractive index and whiteness with minimal environmental concern.

photocatalytic coatings and water treatmentUV protective pigments and sunscreensself-cleaning surfaces and antimicrobial coatingsoptical and white pigmentsdye-sensitized solar cellsceramic and composite reinforcement

Compliance & Regulations

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

Units:

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	180.1	GPa	—
↳	209.1	GPa	—
↳	283.9	GPa	—
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	—
Elastic Anisotropy(AU)	0.3510	-	—
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	—
Exfoliation Energy(Eexf)	88.02	meV/atom	—
Poisson's Ratio(ν)2 entries	0.3490	-	—
↳	0.4800	-	—
Shear Modulus(G)3 entries	60.53	GPa	—
↳	109.7	GPa	—
↳	71.93	GPa	—

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

Property	Value	Unit	Conditions	Source
Thermal Conductivity(k)	0.5600 range 0.2900–2.540median of 18 measurements	W/(m·K)	—

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

Property	Value	Unit	Conditions	Source
Density(ρ)	3.842	kg/m³	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)2 entries	3.300	eV	—
↳	2.665	eV	—
Dielectric Constant (Relative Permittivity)(εr)3 entries	35.47	-	—
↳	1,026.1	-	—
↳	287.3 range 7.773–566.9median of 2 measurements	-	—
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	—
Total Dielectric Tensor(ε)	Matrix (redacted)	-	—
Magnetic Moment(μB)	0.000	µB	—
Piezoelectric Modulus(eij)2 entries	0.05735	C/m²	—
↳	0.000	C/m²	—
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	—
Seebeck Coefficient(S)	-33.12	µV/K	—

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.1004	eV/atom	—
Formation Energy(ΔHf)2 entries	-3.261	eV/atom	—
↳	-3.163	eV/atom	—

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

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.