Science Challenge Result # 2 - What is Aluminium Oxide

Aluminium is one of the most reactive metal that exists on the planet and yet we make cans out of it for drinking purposes. Want to know why Aluminium fizzy drink cans do not explode on our face? 

(Source: here)

A brief abstract of Aluminium 

Aluminium is the most abundant metal on our Earth. 7% of the Earth’s crust is made out of this metal. It is one of the lightest but among the strongest. Being 13^th on the reactivity series, it is surprising that it does not rust. There is a reason for that. 

Since Aluminium can be easily molded to make cans and does not react with the corrosive nature of beverages, it has been used for making cans since 1985. 

Thank you Aluminium Oxide 

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The winners 

The right answer for the question “What is Aluminium Oxide?” is A - It is the protective layer formed on Aluminium metal.

(Credit: here) 

The post payout is in some 12 hours but we already have the winners (16 in total): 

@sultnpapper , @alxmuh , @drishitmitra , @dcardozo25 , @royaleagle , @mulyadi.alwi , @rayne122 , @mental-extract , @ailenepm , @dexterdev , @nihalmaz , @toastymagoo , @lifeplus1 , @cobmaximus , @cowceratops ,  @neokuduk 

Congratulations to all the winners!!!

Properties of Aluminium Oxide

• Very good electrical insulation (1x 10¹⁴ to 1x10¹⁵ Ωcm)
• Very high compressive strength (2,000 to 4,000 MPa)
• Moderate to extremely high mechanical strength (300 to 630 MPa)  
• Moderate thermal conductivity (20 to 30 W/mK)
• High hardness (15 to 19 GPa)
• Good gliding properties
• Operating temperature without mechanical load 1,000 to 1,500°C.
• High corrosion and wear resistance
• Low density (3.75 to 3.95 g/cm³)
• Bioinert and food compatible

Uses of Aluminium Oxide 

(Source: here)

Apart from protecting Aluminium metal, Aluminium Oxide has many other uses as we are about to discover.  Examples of applications for aluminum oxide Al₂O₃ advanced ceramics are heavy-duty forming tools, substrates and resistor cores in the electronics industry, tiles for wear protection and ballistics, thread guides in textile engineering, seal and regulator discs for water taps and valves, heat-sinks for lighting systems, protection tubes in thermal processes or catalyst carriers for the chemicals industry. 

Conslusion

Congratulations to all the winners. Your rewards will be sent to you in some 12 hours when the post will payout. 

The next science quiz will be out tomorrow in some 12 hours so stay tuned if you want to participate in the lazy Saturday contest. 

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Feeling enlightened and happy to find out about Aluminium? Why not play the Steemit Lotto Game on this post to change your mind: Steemit Lotto Weekly # 14 - Minimum Pot Size 52.5 STEEM!!!!!!!!

Good luck to everyone  ? 

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Don't forget to check if you are a winner every Saturday and Sunday at around 19 00 (GMT)

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