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Barium Bromid
Barium Hydroxide
Barium Oxalate
Barium Informationen, einschließlich Technische Daten, Safety Data und seine Eigenschaften, Forschung, Anwendungen und andere nützliche Fakten sind erörtert werden. Wissenschaftliche Fakten, wie die atomare Struktur, Ionisierungenergie, Fülle auf der Erde, Leitfähigkeit und thermischen Eigenschaften sind im Preis inbegriffen.

Barium is a member of the alkaline-earth metals. It has technical applications in glass, electronics and medicine. It is also used in paints and colorants. Barium ist als Metall und Verbindungen mit Reinheiten von 99% auf 99,999% (ACS Note in höchster Reinheit); Metalle in Form von Folien, Sputtern Ziel, und Stab, und Verbindungen, wie Submikron- und Nanopuder-Verarbeitung. Electronic coatings based on barium titanate are essential to cell phones and other microelectroinics. It has long been used in medical diagnostic techniques because it makes a good x-ray contrast medium. Barium is a dopant in various fluorescent lamp coating formulas.

Barium Tatsachen, einschließlich Aussehen, CAS #, und molekularen Formel und Sicherheit, Forschung und Eigenschaften sind

 

  Hydrogen                                 Helium
  Lithium Beryllium                     Boron Carbon Nitrogen Oxygen Fluorine Neon
  Sodium Magnesium                     Aluminum Silicon Phosphorus Sulfur Chlorine Argon
  Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
  Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
  Cesium Barium Lanthanum Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
                                     
      Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium    
      Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium    


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Für viele spezifische Staaten, Formen und Formen auf dem Produkt Seiten, die auf der linken Seite. Elemental oder metallischen Formen gehören Pellets, Stab, Draht und Granulate für die Verdunstung Ausgangsmaterial. Nanopartikel Nanopulver und die extrem hohe Fläche, die Nanotechnologie Forschung und jüngsten Experimenten demonstrieren Funktion zur Schaffung neuer und einzigartigen Eigenschaften und Vorteile.

Oxide sind in Formen einschließlich Pulvern und dichten Pellets für die Verwendung als optische Beschichtung und dünnen Film. Oxide sind in der Regel unlöslich. Fluoride sind ein weiteres unlöslichen Form für Anwendungen, in denen Sauerstoff unerwünscht wie Metallurgie, der chemischen und physikalischen Aufdampfung und in Einige optische Beschichtungen. Barium ist in löslicher einschließlich Chloride, Nitrate und Acetate. Diese Verbindungen hergestellt werden, sind auch Lösungen in bestimmten stoichiometries.

Barium is a Block S, Group 2, Period 6 element. The electronic configuration is [Xe] 6s2. In its elemental form barium's CAS number is 7440-39-3. The barium atom has a radius of 217.4.pm and it's Van der Waals radius is 200.pm.

Alle elementare Metalle, Verbindungen und Lösungen können synthetisiert werden in einer sehr hoher Reinheit (eg 99,999%) für Labor, fortgeschrittene elektronische, Metallurgie und optischen Materialien und andere hohe Technologie Vorteile. Information ist für einen stabilen (nicht radioaktiven) Isotopen. Organo - Metallic Barium Verbindungen sind löslich in organischen oder nicht wässrigen Lösungsmitteln. Siehe Analytical Services für Informationen über verfügbare zertifiziert chemischen und physikalischen Analyse Techniken wie MS - ICP, X-Ray Diffraction, PSD und Fläche (BET) Analyse.

Barium was first discovered by Sir Humphrey Davy in 1808.

French Barium German Barium Italian bario Portuguese Bário Spanish bario Swedish Barium

Abundance. The following table shows the abundance of barium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.

Isotope
Atomic Mass
% Abundance on Earth
Ba-130
129.906310
0.106
Ba-132
131.905056
0.101
Ba-134
133.904503
2.417
Ba-135
134.905683
6.592
Ba-136
135.904570
7.854
Ba-137
136.905821
11.23
Ba-138
137.905241
71.70

Safety Data. The safety data for barium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.

Ionisation Energie. Die Ionisierungenergie für barium (die am wenigsten Energie benötigt, um ein einzelnes Elektron aus dem Atom in seinem Grundzustand in der Gasphase) ist in der folgenden Tabelle dargestellt:

1st Ionization Energy
502.86 kJ mol-1
2nd Ionization Energy
965.24 kJ mol-1
3rd Ionization Energy
- kJ mol-1

Conductivity. As to barium's electrical and thermal conductivity, the electrical conductivity measured as to electrical resistivity @ 20 ºC is 50 μΩcm and its electronegativities (or its ability to draw electrons relative to other elements) is 0.89. The thermal conductivity of barium is 18.4 W m-1 K-1.

Thermal Properties. The melting point and boiling point for barium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.

Heat of Fusion
7.66 kJ mol-1
Heat of Vaporization
150.9 kJ mol-1
Heat of Atomization
180.7 kJ mol-1

 
Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point
Boiling Point
Vanderwaals radius
Ionic radius Energy of first ionization
Ba 56 137.33 g.mol -1 0.9 3.5 g.cm-3 at 20 °C 725 °C 1640 °C 200.pm 0.135 502.86 kJ.mol-1

PRODUCT CATALOG German Operations Submicron & Nanopowder Tolling Ultra High Purity Sputtering Target Crystal Growth Rod, Plate, Powder, etc. Foil
 
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Recent Research & Development for Barium

  • Utility of endoscopic ultrasound in the diagnosis of aberrant right subclavian artery. J Gastroenterol Hepatol. 2007 Nov;22(11):1717-21.

  • A case of mediastinitis following botulinum toxin type A treatment for achalasia. Nat Clin Pract Gastroenterol Hepatol. 2007 Oct;4(10):579-82.

  • Congenital cricopharyngeal achalasia: a rare cause of dysphagia in an infant. Turk J Pediatr. 2007 Apr-Jun;49(2):193-5.

  • The interaction of EDTA with barium sulfate. J Colloid Interface Sci. 2007 Sep 8; [Epub ahead of print]

  • Pathologic evidence of microvascular rarefaction in the brain of renal hypertensive rats. J Stroke Cerebrovasc Dis. 2003 Jan;12(1):8-16.

  • Tracking clinical improvement of swallowing disorders after stroke. J Stroke Cerebrovasc Dis. 2002 Jan;11(1):23-27.

  • Please treat me with metoclopramide. Emerg Med J. 2007 Oct;24(10):735-6.

  • [Mixed exocrine-endocrine gastric carcinoma: a rarity of little consequence?] Dtsch Med Wochenschr. 2007 Oct;132(40):2077-80. German.

  • Preparation of mesostructured barium sulfate with high surface area by dispersion method and its characterization. J Colloid Interface Sci. 2007 Sep 7; [Epub ahead of print]

  • Site localization and characterization of pain during radiofrequency ablation of the pulmonary veins. Pacing Clin Electrophysiol. 2007 Oct;30(10):1210-4.

  • Dynamics of Capsule Swallowing by Healthy Young Men and Capsule Transit Time from the Mouth to the Stomach.
    Dysphagia. 2007 Jan 10; [Epub ahead of print]

  • Radiation doses to children during modified barium swallow studies.
    Pediatr Radiol. 2007 Jan 10; [Epub ahead of print]


  • Upper gastrointestinal tumours: diagnosis and staging.
    Cancer Imaging. 2006 Dec 29;6:213-7. Review.

  • Calcific parasite or surgical miscellany?
    J Pediatr Surg. 2007 Jan;42(1):267-9.


  • Hydrogeochemical characteristics of the Tinto and Odiel Rivers (SW Spain). Factors controlling metal contents.
    Sci Total Environ. 2007 Jan 4; [Epub ahead of print]

  • An Algorithm for the Management of Sigmoid Colon Volvulus and the Safety of Primary Resection: Experience with 827 Cases.
    Dis Colon Rectum. 2007 Jan 3; [Epub ahead of print]


  • Epigastric mass in a young girl: trichobezoar. Imaging diagnosis.
    Nepal Med Coll J. 2006 Sep;8(3):211-2.

  • Multidisciplinary work on barium contamination of the karstic upper Kupa River drainage basin (Croatia and Slovenia); calling for watershed management.
    Environ Geochem Health. 2007 Jan 4; [Epub ahead of print]

  • Endogenous Serotonin Excites Striatal Cholinergic Interneurons via the Activation of 5-HT 2C, 5-HT6, and 5-HT7 Serotonin Receptors: Implications for Extrapyramidal Side Effects of Serotonin Reuptake Inhibitors.
    Neuropsychopharmacology. 2007 Jan 3; [Epub ahead of print]

  • Sevoflurane Breakdown Produces Flammable Concentrations of Hydrogen.
    Anesthesiology. 2007 Jan;106(1):144-148.

 

 

 

 

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