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Home / Functional Black Titanium / Black Titanium Dioxide | Broadband Light Absorption & Laser-Responsive Pigment

Black Titanium Dioxide | Broadband Light Absorption & Laser-Responsive Pigment

Modified titanium dioxide with oxygen-vacancy–induced electronic states enabling visible–NIR absorption and photothermal response.

Introduction

Black Titanium Dioxide | Broadband Light Absorption & Laser Interaction

Direct Answer

Black titanium dioxide is a modified TiO₂ material containing oxygen vacancies or reduced Ti states that enable visible and near-infrared light absorption and photothermal activation.

What it is

A non-stoichiometric titanium dioxide with altered electronic structure enabling broadband optical absorption.

What it is NOT

Not carbon black, not metallic titanium, not a conductive oxide, and not photocatalyst-grade TiO₂.

Where it fits

Used as a functional absorber or marking pigment in coatings, polymers, and laser-interactive systems.

Boundary condition

Performance depends on defect density, crystal phase, dispersion quality, and optical coupling with the host matrix.

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Product Parameter

钛黑

产品型号	钛黑535
颜色	青黑色
颜料索引号	PBk35
CAS号	51745-87-0
化学式	Ti/O
晶相结构	金红石型
密度g/cm3	4.3
PH值	7～8
吸油量g/100g	12～18
105℃挥发物％	≤0.5
水溶物％	≤0.5
细度μm	0.8～2.0μm
耐热℃	≤600℃
耐光性	8
耐酸性	5
耐碱性	5

Product feature

Entity Summary

Black titanium dioxide is a modified TiO₂ material engineered to absorb visible–NIR radiation through defect-induced electronic states.

Material Identity

Primary name: Black Titanium Dioxide

CAS number: 51745-87-0

Synonyms: Reduced TiO₂, oxygen-deficient TiO₂

Material class: Functional oxide pigment

Generalized formula: TiO₂−x

Physical form: Fine black or dark gray powder

Mechanism of Action

Oxygen vacancies introduce mid-gap electronic states
Enhanced absorption in visible and near-infrared regions
Photon energy converted into localized thermal energy
Enables laser–material interaction at lower energy densities

Functional Role

Light-to-heat conversion
Optical absorption enhancement
Laser marking sensitization
Color and contrast generation

Application Windows

Compatible with polymer coatings, inks, plastics, and laser-markable substrates. Performance depends on dispersion and matrix transparency.

When to Use

When NIR or laser absorption is required
When carbon black causes conductivity or contamination issues
When stable inorganic pigment is required

When NOT to Use

When electrical conductivity is required
When optical transparency is required
When photocatalytic activity is desired

Limitations & Failure Modes

Lower absorption than carbon black at equal loading
Performance sensitive to particle dispersion
Not electrically conductive
Overloading causes opacity and mechanical degradation

Alternatives & Trade-offs

Carbon Black: higher absorption, conductive, poorer stability
ATO — conductive but less laser-responsive
rGO — high conductivity but higher cost and dispersion sensitive
GNP — enhanced conductivity with a stable dispersal system required

FAQ

Is black TiO₂ electrically conductive?

No. It enhances optical absorption but does not form conductive networks.

Can it replace carbon black?

Only in applications requiring optical absorption without electrical conductivity.

Application area

Black Titanium Dioxide - Technical Insights

Last updated: 2026-01-22

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