00:01
Hello students, so we have to select one material from each group of ceramic polymer and metals and we have to write an essay on it.
00:08
So let us start the first metals.
00:11
So in metals we'll select iron and the composition is that it is a silver grey metal first of all and it occurs in an iron ore with fe more than fe that is iron more than 65%.
00:24
And the most commonly used iron bearing minerals containing iron compounds are fe 203 with 70 % iron, magnetite, which is fe 3 or 4 with 72 .4 % fe, and less importance is given to lemonite, cedarite, pyrite, which consists of less than 40 % of fe, that is iron.
00:52
The structure of iron, it is body -centered cubic lattice with a equal to 266 .65 picometer.
01:02
In application let us now come to it so it is malleable and ductile and has a shiny glow luster iron oxide nanoparticle is used in biomedical applications as they have high surface area and are reactive they do not cause pollution problems also they do not cause pollution problems moving on to the second one that is ceramics so coming to the introduction so ceramics they show the numerous application due to physical chemical properties they have the advantage of being inert in the human body and their inertness just because they're inert they're used for bone and teeth replacement in human body.
01:51
There are three types of ceramics, earthware, stoneware and porcelain.
01:56
Now the composition.
01:59
So, alumina, it is an industrial ceramic which has high hardness and it is manufactured from.
02:08
Boxite.
02:09
Boxite is an ore.
02:11
It can be shaped using injection molding, dye pressing, isostatic pressing, ship castin, etc.
02:18
Coming to the properties and the applications...