PROPERTIES OF MATERIALS

PROPERTIES OF MATERIALS

1. Density

   • Is the relation ship between the mas of an object and its volume

2. Obtical Propertis

   • Opacity
   • Translucency
   • Transparency

3. Magnetism

4. Permeability

   • Permeable materials
   • impermeable materials
   • waterproof

5. Porosity

   • Pores
     • Sponge
     • Cork

6. Hardness

   • Clay
   • Lead
   • Glass

7. Tenacity

   • Tenacious
     • Bell

8. Fragility

   • Fragil

9. Elasticity

   • Elastic

10. Plasticity

    • Plastic

11. Ductility

    • Copper is ductile

12. Maleability

    • Stale is malleable

13. Machanical resistance

14. Weldability

    • Steels and plastics have a high degree of weldability

15. Fusibility

    • Bronze, brass, iron... , aer very fusible materials

16. Thermal conductivity

    • Metals transmit heat easily through them, so they are good conductor of heat: thermal conductors
    • Wood, plastic or ceramic materials practically prevent heat from passing from them: Thermal insulator

17. Electrical conductivity

    • Metals are good conductors of electricity: Electrical conductors
    • Wood, plastic or ceramic materials aren't good conductors of electricity: Electrical insulators or insulators

18. Acoustic conductivity

    • Metals are good conductors of sound: Acoustic conductors
    • Glass, fiber, plastics, aren't good conductors of sound: Acoustic insulators

19. Ecological properties

    • Reciclability
    • Toxicity
    • Biodegradability