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Strontium oxide

Basic information Physical Properties Uses Preparation Safety Related Supplier
Strontium oxide Basic information
Strontium oxide Chemical Properties
  • Melting point:2430°C
  • Boiling point:3000°C
  • Density 4.7 g/mL at 25 °C(lit.)
  • Flash point:3000°C
  • solubility Soluble in potassium hydroxide solution. Slightly soluble in alcohol. Insoluble in acetone and ether.
  • form Powder
  • color white
  • Specific Gravity4.7
  • Water Solubility Soluble in fused potassium hydroxide. Insoluble in ether and acetone. Decomposes in water to Sr(OH){2} with evolution of heat.Slightly soluble in alcohol. Insoluble in acetone and ether.
  • Sensitive Moisture Sensitive
  • Merck 14,8846
  • CAS DataBase Reference1314-11-0(CAS DataBase Reference)
  • EPA Substance Registry SystemStrontium oxide (SrO) (1314-11-0)
Safety Information
  • Hazard Codes C
  • Risk Statements 14-34
  • Safety Statements 26-30-36/37
  • RIDADR UN 3262 8/PG 2
  • WGK Germany 3
  • TSCA Yes
  • HazardClass 8
  • PackingGroup II
MSDS
Strontium oxide Usage And Synthesis
  • Physical PropertiesGrayish-white porous mass; cubic crystalline structure; refractive index 1.810; vaporizes above 3,000°C; reacts with water forming strontium hydroxide, Sr(OH)2 with evolution of heat; miscible with fused caustic potash; slightly soluble in alcohol; insoluble in acetone and ether.
  • UsesStrontium oxide is an alkaline earth flux that melts at 4406°F(2430°C), but the substance begins its fluxing action above 1994°F(1090°C). Strontium oxide's properties are difficult to describe, so it's often compared to other alkaline earth oxides like calcium and barium oxides. It has similarities to both. Strontium oxide has fluxing properties and a strong color response like barium oxide, although not as intense. It adds strength and durability to a glaze like calcium oxide and it melts very slowly, thus increasing the melting range of a glaze.
    Strontium oxide is often substituted for toxic barium oxide. A typical substitution is 0.75 grams of Strontium carbonate for 1 gram barium carbonate; keep in mind that it won't produce the same color response as barium oxide.
    Strontium has a moderate viscosity and surface tension and a moderate to high expansion and contraction rate that's similar to calcium oxide.It's not volatile at ceramic temperatures, is slightly soluble,and has no known toxicity.
    A slightly soluble source of strontium oxide is strontium carbonate, which usually contains some CaO.
  • PreparationStrontium oxide is prepared by thermal decomposition of strontium carbonate, hydroxide, or nitrate:
    SrCO3 → SrO + CO2
    Sr(OH)2 → SrO + H2O
    Sr(NO3)2 → SrO + N2O5
  • Chemical Propertieswhite to grayish white; reacts with water, forming Sr(OH)2, with evolution of heat; enthalpy of fusion 75.00kJ/mol [MER06] [CRC10]
  • Physical propertiesStrontium oxide or strontia, SrO, is formed when Sr metal reacts with oxygen:
    2Sr+ O2→2SrO
    Burning strontium in air results in a mixture of strontium oxide and strontium nitride. It also forms from the decomposition of strontium carbonate SrCO3. It is a strongly basic oxide. It reacts with moisture forming the hydroxide and with carbon dioxide in the air to form the carbonate.
  • UsesSrO is also used in medicine, pyrotechnics, pigments, greases, soaps, and as a chemical intermediate. It is also produced as high-purity strontium oxide rotatable sputtering targets with the highest possible density and smallest possible average grain sizes for use in semiconductor, photovoltaic, and coating applications by chemical vapor deposition and physical vapor deposition and optical applications.One of the reasons why rare metals are restrained from wide use in production is their high cost.
  • UsesStrontium oxide is used as a flux in the making of glass for television tubes in place of barium oxide [CAS: 1304-28-5] BaO.
  • Usesmanufacture of strontium salts.
Strontium oxide Preparation Products And Raw materials
Strontium oxide(1314-11-0)Related Product Information
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