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Barium titanate is an oxide of barium and titanium with the chemical formula BaTiO3. It is a displacive type ferroelectric ceramic material, with a photorefractive effect and piezoelectric properties. It has tetragonal crystal structure. A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ...
Molar mass is the mass of one mole of a chemical element or chemical compound. ...
Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ...
In crystallography, the tetragonal crystal system is one of the 7 lattice point groups. ...
CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ...
Density (symbol: Ï - Greek: rho) is a measure of mass per unit of volume. ...
In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ...
It has been suggested that this article or section be merged with Solution. ...
Water has the chemical formula of H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ...
The melting point of a solid is the temperature at which it changes state from solid to liquid. ...
The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ...
In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ...
An oxide is a chemical compound of oxygen with other chemical elements. ...
General Name, Symbol, Number barium, Ba, 56 Chemical series alkaline earth metals Group, Period, Block 2, 6, s Appearance silvery white Atomic mass 137. ...
General Name, Symbol, Number titanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4, d Appearance silvery metallic Atomic mass 47. ...
A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ...
In physics, the ferroelectric effect is an electrical phenomenon whereby certain ionic crystals may exhibit a spontaneous dipole moment. ...
Fixed Partial Denture, or Bridge The word ceramic is derived from the Greek word κεÏαμικος (keramikos, having to do with pottery). The term covers inorganic non-metallic materials whose formation is due to the action of heat. ...
The photorefractive effect is a nonlinear optical effect seen in certain crystals and other materials that respond to light by altering their refractive index. ...
Piezoelectricity is the ability of certain crystals to produce a voltage when subjected to mechanical stress. ...
In crystallography, the tetragonal crystal system is one of the 7 lattice point groups. ...
Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ...
Appearance
It has the appearance of a white powder or transparent crystals. It is insoluble in water and soluble in concentrated sulfuric acid. Its risk and safety phrases are R20/22, Template:S28A, S37, and S45. Sulfuric acid (British English: sulphuric acid), H2SO4, is a strong mineral acid. ...
Manufacture Barium titanate can be manufactured by sintering of barium carbonate and titanium dioxide, optionally with other materials for doping. This article or section does not cite its references or sources. ...
Barium carbonate (BaCO3), also known as witherite, is a chemical compound used in rat poison, bricks, and cement. ...
Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula TiO2. ...
Barium titanate is often mixed with strontium titanate. Strontium titanate is an oxide of strontium and titanium with the chemical formula SrTiO3. ...
Uses Barium titanate is used as a dielectric material for ceramic capacitors, and as a piezoelectric material for microphones and other transducers. As a piezoelectric material, it was largely replaced by lead zirconate titanate, also known as PZT. A dielectric, or electrical insulator, is a substance that is highly resistant to the flow of electric current and has a relative permittivity greater than unity. ...
A capacitor is a device that stores energy in the electric field created between a pair of conductors on which electric charges of equal magnitude, but opposite sign, have been placed. ...
A microphone, sometimes referred to as a mike or mic (pronounced mike), is an acoustic to electric transducer that converts sound into an electrical signal. ...
A transducer is a device, usually electrical or electronic, that converts one type of energy to another. ...
Lead zirconium titanate (PZT, also Lead zirconate titanate) is a ceramic perovskite material that shows a marked piezoelectric effect - that is, it develops a voltage difference across two of its faces when compressed, and ferroelectric effect. ...
Polycrystalline barium titanate displays positive temperature coefficient, making it an useful material for thermistors and self-regulating electric heating systems. The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K (kelvin). ...
NTC thermistor, bead type, insulated wires Thermistor symbol A thermistor is a type of resistor used to measure temperature changes, relying on the change in its resistance with changing temperature. ...
Fully-dense nanocrystalline barium titanate has 40% higher permittivity than the same material prepared in classic ways.[1] Permittivity is a physical quantity that describes how an electric field affects and is affected by a dielectric medium and is determined by the ability of a material to polarize in response to an applied electric field, and thereby to cancel, partially, the field inside the material. ...
Barium titanate crystals find use in nonlinear optics. The material has high beam-coupling gain, and can be operated at visible and near-infrared wavelengths. It has the highest reflectivity of the materials used for self-pumped phase conjugation (SPPC) applications. It can be used for continouos-wave four-wave mixing with milliwatt-range optical power. For photorefractive applications, barium titanate can be doped by various other elements, eg. cerium.[2] Nonlinear optics is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the polarization P responds nonlinearly to the electric field E of the light. ...
Four-Wave Mixing is an intermodulation distortion in optical systems, similar to the third order intercept in electrical systems. ...
General Name, Symbol, Number cerium, Ce, 58 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 140. ...
Thin films of barium titanate display electrooptic modulation to frequencies over 40 GHz.[3] Thin films are material layers of about 1 µm thickness. ...
Electro-optic modulator is an optical device in which a signal-controlled element is used to modulate a beam of light. ...
See also Strontium titanate is an oxide of strontium and titanium with the chemical formula SrTiO3. ...
Lead zirconium titanate (PZT, also Lead zirconate titanate) is a ceramic perovskite material that shows a marked piezoelectric effect - that is, it develops a voltage difference across two of its faces when compressed, and ferroelectric effect. ...
References - ^ http://research.ucdavis.edu/ncd.cfm?caseno=2003-010 [1]
- ^ http://www.redoptronics.com/Ce:BaTiO3-crystal.html Ce:BaTiO3
- ^ http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-24-5962 [2]
External links - For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see Wikipedia:Chemical sources.
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