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Strontium Sputtering Targets (Sr)

Strontium Sputtering Targets (Sr)
Material Type Strontium
Symbol Sr
Atomic Weight 87.62
Atomic Number 38
Color/Appearance Silvery White, Metallic
Thermal Conductivity 35 W/m.K
Melting Point (°C) 769
Coefficient of Thermal Expansion 22.5 x 10-6/K
Theoretical Density (g/cc) 2.6
Z Ratio **1.00
Sputter RF
Max Power Density*
(Watts/Square Inch)
20
UN Number 3132
Comments Wets but does not alloy with W/Ta/Mo. May react in air.

General

Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. The metal forms a dark oxide layer when it is exposed to air. Strontium has physical and chemical properties similar to those of its two vertical neighbors in the periodic table, calcium and barium. It occurs naturally in the minerals celestine, strontianite, and putnisite, and is mined mostly from the first two of these. While natural strontium is stable, the synthetic 90Sr isotope is radioactive and is one of the most dangerous components of nuclear fallout, as strontium is absorbed by the body in a similar manner to calcium. Natural stable strontium, on the other hand, is not hazardous to health.

Material Notes

Strontium Sputtering Targets, Purity is 99.5%; Circular: Diameter <= 14inch, Thickness >= 1mm; Block: Length <= 32inch, Width <= 12inch, Thickness >= 1mm. Due to the highly reactive nature of these materials, packaging in oil is required to reduce the opportunity for oxidation or other reaction.
 


Other Information of Strontium Sputtering Targets

Applications
Electronics
• Semiconductor
• Flat panel displays
Features
Competitive pricing
• High purity
• Grain refined, engineered microstructure
• Semiconductor grade

Manufacturing Process
Refining
  Three-layer electrolytic process
• Melting and casting
  Electrical resistance furnace - Semi-continuous casting
• Grain refinement
  Thermomechanical treatment
• Cleaning and final packaging - Cleaned for use in vacuum
  Protection from environmental contaminants
  Protection during shipment
Options
99.999% minimum purity
• Semiconductor grade aluminum alloys available
  Al/Si,Al/Cu,Al/Cu/Si
• Planar circular targets up to 18'' (457mm) diameter
• Planar tiles up to 48''(1200mm) X 15.75''(400mm) for larger target configurations
• Smaller sizes also available for R&D applications
• Sputtering target bonding service
 
 
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