titanium dioxide

Học thuật
Thân thiện
titanium dioxide

A scientist examines a sample of titanium dioxide under bright laboratory lights.

Definition

Noun: 1. A white, inorganic compound (TiO₂) used extensively as a white pigment: It is a naturally occurring oxide of titanium, valued for its exceptional brightness, very high refractive index (which gives it strong covering power or opacity), and resistance to discoloration under sunlight, making it highly durable.

Usage
  • As a common pigment: Titanium dioxide is the primary white pigment used in a vast array of products.
  • In industrial and consumer applications: Its properties make it a key ingredient in paints, coatings, plastics, paper, inks, cosmetics, and food products.
Examples
  • Noun:
    • The paint's brilliant whiteness and longevity are due to the titanium dioxide in its formula.
    • Many sunscreens use micronized titanium dioxide as a physical barrier against UV radiation.
    • The FDA approves the use of titanium dioxide as a color additive in certain foods.
Advanced Usage
  • Technical Contexts: In materials science, it may be referred to by its mineral forms, such as rutile or anatase.
    • The anatase form of titanium dioxide is often used as a photocatalyst.
  • Regulatory and Safety Discussions: Its use, especially in nanoparticle form in cosmetics and food, is a subject of ongoing scientific and regulatory review.
    • The debate focuses on the potential health impacts of inhaling titanium dioxide nanoparticles.
Variants and Related Words
  • Titania: A less common name for titanium dioxide, often used in scientific or poetic contexts.
  • TiO₂: The chemical formula for titanium dioxide.
  • Titanium white: A common name for the pigment in artist paints and industrial coatings.
Synonyms
  • Pigment White 6 (its common name in the Colour Index system used for pigments and dyes).
  • Titania (as noted above).
Notes on Meaning
  • The definition strictly refers to the chemical compound TiO₂. Its utility and fame derive almost entirely from its role as a white pigment and opacifier. It should not be confused with pure titanium metal or other titanium compounds.
titanium dioxide

A scientist examines a sample of titanium dioxide under bright laboratory lights.

Noun
  1. a white powder used as a pigment for its high covering power and durability

Từ đồng nghĩa