亚洲欧美日韩一区二区

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      Product Summary of Lost Carbonate Sintering (LCS) Porous Copper Foam

      Goodfellow is delighted to announce the addition of an exciting new product to our range – LCS copper foam.

      What is LCS Copper foam?

      Unlike the copper foams we have had in our catalogue for several years, which are a permeable structure of cells and continuous ligaments with pore sizes of 4 to 16 pores /cm (10 to 40 PPI) and a relative density of around 9%, this new foam has much smaller pores (300 to 600µm) and a relative density of around 37%. This gives it a much higher surface area.

      New LCS Copper Foam

      Traditional Copper Foams from Goodfellow

      Properties

      CHARACTERISTICS

      New LCS Copper Foam

      Other Copper Foams available from Goodfellow

      Material

      Copper 99.7%

      Copper 99.9%

      Standard catalogue sizes

      5mm thick x 50mm x 64mm

      10mm thick x 50mm x 64mm

      4mm thick x 23mm diameter

      (other sizes on request)

      6.35mm thick x 150mm x 150mm

       (other sizes on request)

      Standard cladding

      None

      None

      Cladding thickness

      Not applicable

      Not applicable

      Standard cell size

      300 to 600µm

      10 to 20 pores/cm (25 to 50 PPI)

      4 to 16 pores/cm (10 to 40 PPI)

      Other available cell sizes

      200 to 300µm, 630 to 1000µm

      2 pores/cm (5 PPI)

      Foam topology

      Randomly distributed, interconnected pores

      Randomly distributed, interconnected pores

      Relative density

      37%

      5 to 12%

      Nominal density

      3.32 g/cm3

      0.45 to 1.08 g/cm3

      Relative surface area

      24 mm2/mm3 (24000 m2/m3)

      200 to 2000m2/m3

      Maximum service temperature

      1080°C

      1080°C

      Compression strength

      -

      0.903 MPa‡

      Tensile strength

      13 MPa

      6.9 MPa‡

      Modulus of elasticity

      22 GPa (tension)

      736 MPa‡

      Shear modulus

      9 GPa

      282 MPa‡

      Specific heat

      385 J/kg.K

      385 J/kg.K

      Bulk thermal conductivity

      7 to 43 W.m-1.K-1

      10.1 W.m-1.K-1

      Coefficient of thermal expansion

      16.5 µm.m-1.K-1

      16.5 µm.m-1.K-1 ‡ (20 to 100°C)

      Bulk resistivity

      2.8 * 10-8 to 1.66 * 10-7 ohm-cm (at 20°C)

      6.5 * 10-5 ohm-cm ‡

      ‡ at 8% nominal density

      Uses

      • Liquid cooling
      • Air cooling
      • Heat exchangers
      • Board level electronics cooling
      • Power electronics

      as well as

      • EMI shielding
      • Impact absorption
      • Acoustic dampening
      • Supporting catalytic reactions
      • Filtration

      Production process

      Pure copper powder is mixed with a carbonate powder and compacted. It is then sintered, heating it enough to make the particles of copper powder bond to each other without melting. This forms a matrix of copper ligaments, in between which is the carbonate powder. After cooling the carbonate is either dissolved away in water and recycled or decomposed using heat.

      The carbonate is chosen to have a decomposition temperature higher than the melting point of copper, and can be one or more of a range of widely available carbonates such as calcium, magnesium, potassium or sodium carbonate. The precise choice of carbonate is influenced by the melting point, the size of the particles and their solubility in liquids.

      1. Copper particles are mixed with carbonate particles

      2. The mixture is compacted to shape

      3. The mixture is heated to a temperature of approximately 1000°C, causing the copper to bond.

      4. The carbonate particles are thermally decomposed or dissolved away. The product is then finished and passed to Quality Control.

      Please click here to see catalogue sizes and availability.

      亚洲欧美日韩一区二区

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