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How to change the melting point of a metal?

by Jacquesl
Tags: melting, metal, point
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Jacquesl
#1
Jan29-07, 11:36 AM
P: 136
How to change the melting point of a metal?

Like example:

Iron melting point: 1535 C
Sulfur melting point: 115.36 C
If you combine Iron and Sulfur in a airtight container and light a monster fire under it, you get a sort of a pyrite (iron disulfide (FeS2) Melting point 1,177-1,188 C

Lead melting point: 327.46 C,
Sulfur melting point: 115.36 C
If you do the same procedure with lead and sulfur and get some very strange black stuff called Lead sulfide (PbS) melting point 1116.85 C


Can some please tell me then does something change from sulfide (S ) to disulfide (S2 ) and how can that me done?
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Astronuc
#2
Jan29-07, 03:08 PM
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P: 21,910
The metal Fe is in a different form than a chemical compound (FeS or FeS2), and the bonds between Fe and S are very different than the metal bonds.

Metals are alloyed with other metals in order to change melting point as well as other thermophysical and/or mechanical properties.


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