Caesium or cesium is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (83 °F), which makes it one of only five metals that are liquid at or near room temperature. Caesium is most notably used in atomic clocks. Also webmasters and bloggers for instance need to make sure the images they post on their websites are optimized, to avoid prolonged loading times for their visitors. The software allows you to view instantly the compression results, helping you to decide how much optimization you need. Caesium-based atomic clocks observe electromagnetic transitions in the hyperfine structure of caesium-133 atoms and use it as a reference point.
Caesium metal is highly reactive and very pyrophoric. In addition to igniting spontaneously in air, it reacts explosively with water even at low temperatures, more so than other members of the first group of the periodic table. Caesium is a very soft (it has the lowest Mohs hardness of all elements (0.2)), very ductile, silvery-white metal, which develops a silvery-gold hue in the presence of trace amounts of oxygen.
Caesium is a relatively rare element as it is estimated to average approximately 3 parts per million in the Earth's crust. Caesium can set different compression levels to each image, saving a lot of time, ensuring great results!
The mining of pollucite ore is a selective process and is conducted on a small scale in comparison with most metal mining operations. The ore is crushed, hand-sorted, but not usually concentrated, and then ground. Otherwise, it depends on whether the caesium lands on farms and gardens, or relatively undisturbed forests and mountains. Symbol: Cs; Atomic Number: 55; Atomic weight: 132.9054519.
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Wednesday, November 30, 2011
Tuesday, November 29, 2011
How to Buy Caesium iodide
Caesium iodide is a very useful material with a transmission range from the visible
region out to 70 microns through to a 2mm thick window. CsI is very soft and water-
soluble and when humidity is relatively high polished surfaces may be damaged by moisture
in the atmosphere. CsI has a wider transmission range than the more common potassium
bromide beamsplitters, extending usefulness into the far infrared. A problem with
optical-quality CsI crystals is that they are very soft with no cleavage, making it
difficult to create a flat polished surface.
Caesium Iodide is hygroscopic and readily dissolves in water. This property means that it
needs to be kept away from water and also makes it difficult to polish.
An important application of caesium iodide crystals, which are scintillators, is
electromagnetic calorimetry in experimental particle physics, and is sometimes used for
components in the widest range spectrophotometers. An extremely soft material, Caesium
Iodide is extremely difficult to polish, and so performance is compromised for range.
Doped with Thallium, CsI(Tl) is a useful scintillator which emits at a wavelength that is
a good match for Silicon photodiodes. Arrays of Caesium Iodide are used in security
imaging systems. Principally used for Infrared Spectroscopic windows and also for beam
splitters in FTIR Instumentation. CsI is also available thallium doped for scintillation
applications. It is an ionic compound often used as the input phosphor of an x-ray image
intensifier tube found in fluoroscopy equipment.
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region out to 70 microns through to a 2mm thick window. CsI is very soft and water-
soluble and when humidity is relatively high polished surfaces may be damaged by moisture
in the atmosphere. CsI has a wider transmission range than the more common potassium
bromide beamsplitters, extending usefulness into the far infrared. A problem with
optical-quality CsI crystals is that they are very soft with no cleavage, making it
difficult to create a flat polished surface.
Caesium Iodide is hygroscopic and readily dissolves in water. This property means that it
needs to be kept away from water and also makes it difficult to polish.
An important application of caesium iodide crystals, which are scintillators, is
electromagnetic calorimetry in experimental particle physics, and is sometimes used for
components in the widest range spectrophotometers. An extremely soft material, Caesium
Iodide is extremely difficult to polish, and so performance is compromised for range.
Doped with Thallium, CsI(Tl) is a useful scintillator which emits at a wavelength that is
a good match for Silicon photodiodes. Arrays of Caesium Iodide are used in security
imaging systems. Principally used for Infrared Spectroscopic windows and also for beam
splitters in FTIR Instumentation. CsI is also available thallium doped for scintillation
applications. It is an ionic compound often used as the input phosphor of an x-ray image
intensifier tube found in fluoroscopy equipment.
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Sunday, November 27, 2011
What is Caesium iodide
Caesium iodide is a very useful material with a transmission range from the visible region out to 70 microns through to a 2mm thick window. CsI is very soft and water-soluble and when humidity is relatively high polished surfaces may be damaged by moisture in the atmosphere. Principally used for Infrared Spectroscopic windows and also for beam splitters in FTIR Instumentation. CsI is also available thallium doped for scintillation applications. It is an ionic compound often used as the input phosphor of an x-ray image intensifier tube found in fluoroscopy equipment.
An important application of caesium iodide crystals, which are scintillators, is electromagnetic calorimetry in experimental particle physics, and is sometimes used for components in the widest range spectrophotometers. An extremely soft material, Caesium Iodide is extremely difficult to polish, and so performance is compromised for range. Doped with Thallium, CsI(Tl) is a useful scintillator which emits at a wavelength that is a good match for Silicon photodiodes. Arrays of Caesium Iodide are used in security imaging systems.
Caesium Iodide is hygroscopic and readily dissolves in water. This property means that it needs to be kept away from water and also makes it difficult to polish. CsI has a wider transmission range than the more common potassium bromide beamsplitters, extending usefulness into the far infrared. A problem with optical-quality CsI crystals is that they are very soft with no cleavage, making it difficult to create a flat polished surface.
More about: Buy Caesium iodide
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An important application of caesium iodide crystals, which are scintillators, is electromagnetic calorimetry in experimental particle physics, and is sometimes used for components in the widest range spectrophotometers. An extremely soft material, Caesium Iodide is extremely difficult to polish, and so performance is compromised for range. Doped with Thallium, CsI(Tl) is a useful scintillator which emits at a wavelength that is a good match for Silicon photodiodes. Arrays of Caesium Iodide are used in security imaging systems.
Caesium Iodide is hygroscopic and readily dissolves in water. This property means that it needs to be kept away from water and also makes it difficult to polish. CsI has a wider transmission range than the more common potassium bromide beamsplitters, extending usefulness into the far infrared. A problem with optical-quality CsI crystals is that they are very soft with no cleavage, making it difficult to create a flat polished surface.
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Wednesday, November 23, 2011
Metal Compounds for Sale
Metal Compounds can be classified according to the number of different elements that they contain: binary (two), ternary (three), etc.
An example is the compound Mg2Sn. This is made by fusing together a mixture of magnesium and tin of the appropriate composition, and cooling the resulting melt. The product is homogeneous, as can be seen by cutting and polishing it, and examining the polished surface under a microscope. If more magnesium or tin is used than required by the formula Mg2Sn, the product ceases to be homogeneous - crystals of Mg2Sn can be seen embedded in a matrix of smaller crystals containing the excess of magnesium or tin. The compound Mg2Sn is a bluish-white lustrous solid, having all the properties of a metal.
Metallic compounds fall into one of two categories of compound:
1. Stoicheiometric compounds. These are compounds that obey the law of constant composition to very high accuracy, e.g. CH4, NaCl, Mg2Sn. They are also called “definite” compounds or “Daltonides”. [The word “stoicheiometric” comes from “stoicheiometry”, the name given to the measurement of the proportions of elements in compounds (Greek stoicheion, element, metron, measure).]
2. Non-stoicheiometric compounds. These have a variable composition within certain limits. They are also called “indefinite” compounds or “Berthollides” (after the French chemist Claude Berthollet, 1748-1822, who disputed the law of constant composition).
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An example is the compound Mg2Sn. This is made by fusing together a mixture of magnesium and tin of the appropriate composition, and cooling the resulting melt. The product is homogeneous, as can be seen by cutting and polishing it, and examining the polished surface under a microscope. If more magnesium or tin is used than required by the formula Mg2Sn, the product ceases to be homogeneous - crystals of Mg2Sn can be seen embedded in a matrix of smaller crystals containing the excess of magnesium or tin. The compound Mg2Sn is a bluish-white lustrous solid, having all the properties of a metal.
Metallic compounds fall into one of two categories of compound:
1. Stoicheiometric compounds. These are compounds that obey the law of constant composition to very high accuracy, e.g. CH4, NaCl, Mg2Sn. They are also called “definite” compounds or “Daltonides”. [The word “stoicheiometric” comes from “stoicheiometry”, the name given to the measurement of the proportions of elements in compounds (Greek stoicheion, element, metron, measure).]
2. Non-stoicheiometric compounds. These have a variable composition within certain limits. They are also called “indefinite” compounds or “Berthollides” (after the French chemist Claude Berthollet, 1748-1822, who disputed the law of constant composition).
More about: Metal Compounds
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Tuesday, November 22, 2011
Where to Buy Copper powder
Copper powders are used in many different industries for many different applications. It can be udes in Brazing, Sintered Products, Friction Products, Soft Magnetic Products, Chemicals, Metallurgy, Filtration, Printing, Surface Coating, Welding, Copper Fortification, metal injection molding (MIM), diamond cutting tools, lubricants, etc.
Properties:
Purity: 99.%
Dimensions: 200mesh
Place of Origin: Shandong China (Mainland)
Alloy Or Not: Non-Alloy
Color: rose red
Specifications:
Gas atomized copper powder and brass powder with spherical particle.
copper powder with spherical particle.-20mesh~-400mesh size.
Relevant product:
1.Potassium iodide
2.Caesium iodide
3.Scandium iodide
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Properties:
Purity: 99.%
Dimensions: 200mesh
Place of Origin: Shandong China (Mainland)
Alloy Or Not: Non-Alloy
Color: rose red
Specifications:
Gas atomized copper powder and brass powder with spherical particle.
copper powder with spherical particle.-20mesh~-400mesh size.
Relevant product:
1.Potassium iodide
2.Caesium iodide
3.Scandium iodide
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Monday, November 21, 2011
Strontium iodide for Sale
Strontium iodide is a salt of strontium and iodine. It is an ionic, water-soluble, and deliquescent compound. Used in medicine and as a chemicals intermediate.
CAS:0476-86-5
Molecular formula: SrI2
Molecular Weight: 341.43 g/mol
Mp: 515°C
Properties:
Strontium iodide grows yellow when exposed to air. It is used as a thermal conductor, an electrical conductor, a building material, and a constituent of various metal alloys. Pure Strontium is rather soft and malleable, and a freshly exposed surface has a pinkish or peachy color.
Application:
It can be used in medicine as a substitute for potassium iodide.
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CAS:0476-86-5
Molecular formula: SrI2
Molecular Weight: 341.43 g/mol
Mp: 515°C
Properties:
Strontium iodide grows yellow when exposed to air. It is used as a thermal conductor, an electrical conductor, a building material, and a constituent of various metal alloys. Pure Strontium is rather soft and malleable, and a freshly exposed surface has a pinkish or peachy color.
Application:
It can be used in medicine as a substitute for potassium iodide.
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Sunday, November 20, 2011
Lithium-Cobalt-Dioxide
Rhodium Powder has a corrosion resistance, even higher in boiling aqua regia. But the hydrogen bromate slightly corrodes rhodium. It is used as the raw materials for instrument, chemical industry and precision alloys. Wet iodine and sodium hypochlorite can corrode it. It has the chemical symbol Rh and atomic number 45. It is composed of only one isotope, 103Rh. Rhodium powder can be used as raw materials of electrical instruments, chemical engineering and manufacturing precision alloy etc. Rhodium is a chemical element that is a rare, silvery-white, hard and chemically inert transition metal and a member of the platinum group. Rhodium detectors are used in nuclear reactors to measure the neutron flux level. CAS:7440-16-6, Molecular Weight:102.91.
Rhodium is a so-called noble metal, resistant to corrosion, found in platinum- or nickel ores together with the other members of the platinum group metals. Molecular Formula: Rh The element's major use (about 80% of world rhodium production) is as one of the catalysts in the three-way catalytic converters of automobiles. Because rhodium metal is inert against corrosion and most aggressive chemicals, and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings.
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Rhodium is a so-called noble metal, resistant to corrosion, found in platinum- or nickel ores together with the other members of the platinum group metals. Molecular Formula: Rh The element's major use (about 80% of world rhodium production) is as one of the catalysts in the three-way catalytic converters of automobiles. Because rhodium metal is inert against corrosion and most aggressive chemicals, and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings.
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