titanium dioxide encyclopedia

Discover all you need to know about retirement, investing, and finance, without the jargon or agenda. Get reliable guidance, insight, and easy-to-understand explanations, written, edited, and verified to Britannica's exacting standards. Advocacy for Animals.

titanium dioxide[tī′tā·nē·əm dī′äk‚sīd] (inorganic chemistry) TiO2 A white, water-insoluble powder that melts at 1560°C, and which is produced commercially from the titanium dioxide minerals ilmenite and rutile; used in paints and cosmetics. Also known as titania; titanic anhydride; titanium oxide; titanium white. McGraw-Hill Dictionary ...

Titanium. Titanium is a very strong metal that is used in special applications. The most common isotope has 26 neutrons. Titanium was discovered in 1791 by William Gregor. It is chemical element number 22 on the periodic table. Its symbol is Ti. It has 22 electrons and 22 protons. [1] Its name comes from the name of the strong Greek gods called ...

Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula TiO 2. When used as a pigment, it is called titanium white, Pigment White 6 …

Titanium's most widely used compound, titanium dioxide, is used as a white pigment in paints and plastics and as a food additive to whiten flour, dairy products, and candies. Ingestion is the primary exposure pathway. Corn oil, butter, and white wheat products are perhaps the main sources of titanium. ... Robert Kapp, in Encyclopedia of ...

3. Toxicity of Titanium (IV) Oxide. Titania (titanium (IV) oxide, titanium dioxide, TiO 2) is the most widely used titanium compound, and thus its toxicity should be carefully examined. Similar to titanium, titania has been reported as inert, and thus safe for humans and the environment for many years.

It forms red to reddish brown, hard, brilliant metallic, slender crystals, often completely surrounded by other minerals. Rutile is a commercially important titanium mineral, although most titanium dioxide is produced from ilmenite. Rutile has minor uses in porcelain and glass manufacture as a colouring agent and in making some steels and ...

titanium (Ti), chemical element, a silvery gray metal of Group 4 (IVb) of the periodic table. Titanium is a lightweight, high-strength, low-corrosion structural metal and is used in alloy form for parts in high-speed aircraft. A compound of titanium and oxygen was discovered (1791) by the English chemist and mineralogist William Gregor and ...

titanium dioxide. An ingredient used to increase the opacity or "coverage" of nail enamel; often used as a white pigment. An ingredient used to increase the opacity or coverage of nail enamel;...

Titanium dioxide is a whitening ingredient in foods, cosmetics, and other products. The FDA considers it safe, but high intake could be harmful. From dyes to flavorings, many people are becoming ...

Titanium dioxide, TiO 2, is on Earth the naturally occurring oxide of titanium, forming minerals such as rutile, anatase, and brookite.TiO 2 molecules have recently been identified by radio astronomers in the circumstellar envelope of the evolved star VY Canis Majoris (see Molecules in Space).Rutile traveling-wave masers have been used in very …

Titanium Tetrachloride. Robert Kapp, in Encyclopedia of Toxicology (Second Edition), 2005. Exposure Routes and Pathways. Exposure to titanium tetrachloride is primarily occupational with titanium industry workers having the highest potential for exposure. Titanium tetrachloride enters the environment in the air primarily from factories that use …

Titanium dioxide is an extreme white and bright compound with high index of refraction. In paints it is a white pigment and an opacifying agent.It is in house paints, water paints, lacquers, enamels, paper filling and coating, rubber, plastics, ink, synthetic fabrics, floor coverings, and shoe whiteners.

Titanium Dioxide - an overview | ScienceDirect Topics. Anatase is tetragonal, with two TiO2 formula units (six atoms) per primitive cell. From: Comprehensive Semiconductor …

Titanium dioxide plays a crucial role in enhancing the performance of cosmetics. Its ability to provide broad-spectrum UV protection ensures that the skin is shielded from the damaging effects of the sun. This protection helps prevent sunburn, premature aging, and the development of skin cancer.

Titanium dioxide (TiO2) is widely used in various fields both in daily life and industry owing to its excellent photoelectric properties and its induced superwettability. Generally, superwettability refers to superhydrophilic, superhydrophobic, superamphiphilic, and superamphiphobic surfaces; the mechanism of the superwettability property can be …

Increasing environmental concern, related to pollution and clean energy demand, have urged the development of new smart solutions profiting from nanotechnology, including the renowned nanomaterial-assisted photocatalytic degradation of pollutants. In this framework, increasing efforts are devoted to the development of TiO2-based …

Define titanium dioxide. titanium dioxide synonyms, titanium dioxide pronunciation, titanium dioxide translation, English dictionary definition of titanium dioxide. n. A white powder, TiO2, used as an exceptionally opaque white pigment. American Heritage® Dictionary of the English Language, Fifth Edition. ... Encyclopedia; Tools. A; A; A; A ...

Titanium is a lustrous silver-white metal that exhibits allotropy; below about 880℃ it has a hexagonal crystalline structure, but above that temperature it changes to a cubic crystalline structure. The metal is strong and has low density; it is ductile when pure and malleable when heated. Its chemical properties resemble those of zirconium ...

A Case Study. T. Smijs, S. Pavel, in Nanoengineering, 2015 Abstract. Titanium dioxide (TiO 2) is often employed in sunscreens as inorganic physical sun blocker.To overcome the cosmetically undesired opaqueness of these sunscreens, microsized TiO 2 has been increasingly replaced by nano-sized TiO 2.This chapter aims to discuss the effects of …

Titanium dioxide, a white, opaque, naturally occurring mineral existing in a number of crystalline forms, the most important of which are rutile and anatase. These naturally occurring oxide forms can be mined and serve as a source for …

Titanium dioxide is a common ingredient used in sunscreens to protect the skin from the harmful effects of the sun's UV radiation. It is an inorganic physical sunscreen that reflects UV radiation away from the skin's surface. This reflective action is achieved through the scattering of the UV light, which helps prevent it from penetrating the skin.

The median level of exposure in these departments was assessed to be between 1.5 and 10 mg/m 3. No significant exposure to primary particles of titanium dioxide is thought to occur during the use of products in which titanium dioxide is bound to other materials, such as in paints. 1.3.3. Environmental exposure.

Fossil fuel is a non-renewable resource with limited reserves [1–3]. Over the past 140 years, we have consumed one trillion barrels of oil, and today, the world's demand for energy has exceeded 1000 barrels of oil, 100,000 cubic meters of natural gas, and 221 tons of coal per second [4]. It is clear that the consumption of fossil fuels is not sustainable in the long …

Titanium dioxide (TiO 2) is the standard white pigment used principally in paints, paper, and plastics. It is the most important pigment in the world, accounting for approximately 70% of total pigment volume. Titanium dioxide is made by processing a variety of titanium-containing minerals such as ilmenite and rutile.

Titanium dioxide, also known as titanium(IV) oxide or titania / t aɪ ˈ t eɪ n i ə /, is the inorganic compound with the chemical formula TiO 2.When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891. It is a white solid that is insoluble in water, although mineral forms can appear black. As a pigment, it has a wide …

Titanium dioxide (in the form of E171) is a ubiquitous excipient in tablets and capsules for oral use. In the coating of a tablet or in the shell of a capsule the material disperses visible and UV light so that the contents are protected from the effects of light, and the patient or caregiver cannot see the contents within. It facilitates elegant methods …

Pulp and Paper: Nonfibrous Components. D.P. Rawski, in Encyclopedia of Materials: Science and Technology, 2001 1.3 Titanium Dioxide. Titanium dioxide pigments are finely divided white powders which are chemically inert or unreactive, in contrast to all commonly used materials for paper filling or coating systems, and are used to increase opacity. …

Titania; Titanium dioxide. Definition. Titanium dioxide, TiO 2, is on Earth the naturally occurring oxide of titanium, forming minerals such as rutile, anatase, and …

Titanium dioxide is a bright, white, opaque material with a chemical composition of TiO 2. It is produced by oxidizing ilmenite or other titanium minerals at high temperatures. It is then ground into the fine powder …

TITANIUM DIOXIDE NANOMATERIALS. 3.1 General Properties of Titanium Dioxide. Nanomaterials. Titanium dioxide frequently exists in four mineral forms: anatase, rutile, brookite, and TiO 2(B). The ...

Encyclopedia; Titanium_dioxide_(B) Titanium dioxide (B) See also: titanium dioxide. Titanium dioxide (B) or TiO 2 (B) is the monoclinic form of titanium dioxide. The mineral is found in weathering rims on tektites and perovskite and as lamellae in anatase from hydrothermal veins and has a density lower than that of the other three polymorphs.