Molybdenum a High Temperature Metal: Basic Properties and Applications

Source Google
Put your rating for this post for encouraging the author

There is increasing demand of material which is to be used at ultra high temperature. The material which can be used at elevated temperature should have (a) High melting point (b) good mechanical properties at higher temperature (c) good creep and fatigue resistance (d) better oxidation resistance etc. Refractory metals are the obvious choice for this type of applications because of their very high melting point and their strength. Refractory metals include- W, Mo, Nb, Re, Ta. Here, some of the basic properties, production method and different applications of Molybdenum (Mo) will be discussed in brief.

Electron Shell
Electron Shell | Source Google

The General Properties of Molybdenum Includes:

Atomic No. = 42

Atomic Mass = 96 amu

Melting Point = 2,623 °C (4,753 °F)

8382 °F 4639 °C, Boiling Point = 4912K ,

Density (at 20 °C) = 10.28 g/cc

Specific heat capacity = (25 °C) 24.06 J·mol−1·K−1

Atomic radius = 139 pm

Magnetic property = paramagnetic

Crystal structure = bcc

Source : Google
Production Procedure:

Mo does not occur as the in the free state in nature, instead it is found in the form of minerals principally from molybdenite and Wulfenite. Molybdenum is generally a by-product of copper mining industry. The molybdenite is first heated to a temperature of 700 °C in air which oxidize the sulfide into Mo-Oxide as:

2 MoS2 + 7 O2 → 2 MoO3 + 4 SO2

The oxidized ore is then either heated to 1100 °C to sublimate the oxide, or leached with ammonia which reacts with the molybdenum(VI) oxide to form water-soluble molybdates:

MoO3 + 2 NH4OH → (NH4)2(MoO4) + H2O

Pure molybdenum is produced by the hydrogen reduction of Mo-oxide, while the molybdenum for steel production is reduced by the metallothermy (especially aluminothermic) with addition of iron to produce ferromolybdenum. A common form of ferromolybdenum contains 60% molybdenum. The reduction reaction (aluminothermy ) can be shown as:

MoO3 + Al = Mo + Al2O3


There is a widespread use of Mo in various fields ranging from fertiliser to structural material for spacecrafts. It is material for future. There are many active research is going on worldwide on development of high temperature material based on Molybdenum. In nut shell, the main uses for Molybdenum are:

(1) Alloying element in steel: It is used as alloying element in high-strength steels and stainless steels because it readily forms hard, stable carbides.

(2) High temperature and pressure applications in various industries as Aerospace, Zinc processing industries etc. because of its ability to withstand extreme temperatures and high resistance to corrosion.

(3) Pigments and catalyst.

(4) Aircraft parts and industrial motors.

(5) Mo-99 an isotope of Mo is used in various medical test and cure.

(6) Mo-disulfide as used as lubricant and Mo-dislicide as heating element of high temeparture furnace.

(7) Mo powder is used as fertilizer for cauliflower and some other plants.

(8) As an commercially and technologically important Mo alloy-TZM and TZC


  1. Do you mind if I quote a few of your articles as long aas I provkde credit aand sources
    back to your weblog? My website is in the very same area of interest as yours and my users would
    really benefit from some of thee information you provide here.
    Pleqse lett me know if this alright wuth you.
    Thanks a lot!

  2. Wow, that’s what I was searching for, what a information! existing here at this webpage, thanks admin of this web site.

  3. Thank you for sharing superb informations. Your website is so cool. I am impressed by the details that you have on this blog. It reveals how nicely you understand this subject. Bookmarked this website page, will come back for extra articles. You, my pal, ROCK! I found simply the info I already searched everywhere and simply couldn’t come across. What a great web-site.

  4. In your lens, you can discuss a particular product which you find intriguing or
    useful. Learning how to make money with Squidoo is easy and quite painless.
    But a number of start having a small content.

  5. In your lens, you can discuss a particular product which you find intriguing or useful.
    Learning how to make money with Squidoo is easy and
    quite painless. But a number of start having a small content.


Please enter your comment!
Please enter your name here