titanium and aluminium
DESCRIPTION
Here we can see the main characteristics of these two metals.TRANSCRIPT
TITANIUM AND ALUMINIUM
Alejandro Sabater GarcíaDavid Pender Villalvilla
TITANIUM
Transition metal with 22 atomic number
CHARACTERISTICS
• Abundant material in the enviroment• Silver and grey color• Oxide, ash, or stain appearence• Hexagonal estructure at enviroment
temperature• Exists on Earth and in space
HISTORY
• Discovered in 1791 by William Gregor• Founded in a menaquita mineral in
England• Founded again by Martin Heinrich in
1974• It was this time in rutilo
SPECIFIC PROPERTIES
• Light metal with low density (4507Kg/m3)• Paramagnetic. It doesn’t magnetic.• Resistant to the corrosion and oxidation• Refractory, and few conductivity• Great tenacity, ductile and malleable• Recyclable
USES OF TITANIUM
• Planes, helicopters, armour-plating , missils manufactruring.
• Surgical instruments, crutches and prothesis
• Buildings construction• Corporal Piercings and dental implants• Helmets, rackets and parts of bicycles
TITANIUM PROTHESIS
• Artificial extensions that replace parts of body
• They improve functions of disabled organs• Composed most of them by titanium• Orthopedic, cardic, dental, mammaria,
genital and auditive
NEGATIVE EFFCTS IN HEATH
• Low toxicity• Titanium produces titanium dioxide• It causes some effects in health:• Badbeing, pain of chest, and cough• Skin irritations• Carcinogenity
ALUMINIUM
APPEARANCE AND ORIGIN
• Metal• Silver-grey colour• Metallic texture• Extracted from bauxita• Terrestrial crust has plenty of it Bauxita
HISTORY
• First obtained artificially: 1825• Firstly considered a precious metal• Name “aluminium” from latin “alumen”
Aluminium ingot exposed as a precious metal in the 1850s
PROPERTIES
• Atomic number: 13. Atomic weight: 27u.• Symbol: Al• Light, density: 2700 kg/m3 • Thermal and electrical conductor• Easily malleable• Melting: 660ºC. Boiling: 2470ºC.
UTILITIES
• Mirrors and telescopes• Means of transport• Aluminium foil• Jewelry: ruby and sapphire
RECYCLING
• 20% aluminium production comes from recycling
• Very cheap to recycle (95% off)• 45% of aluminium cans are recycled
CARBON FIBER
• Sinthetic alternative to aluminium• Made of wires• Lighter than aluminium, density: 1750
kg/m3• A kilometre-long filament weights 1 gram
Carbon wire compaired to hair
PROPERTIES
• Much more strength than aluminium• Stays still against heat• Great elasticity• Very expensive• Hi-tech utilities