How does the heating rate affect the thermal transitions in a DSC diagram?

[fr3quency]

Hello everyone! I'm a Materials Science student and I'm trying to answer this question. The results I found searching are scarce. I'd really appreciate if someone could help me.

 

Also, DSC = Differential Scanning Calorimetry.

 

 

PS: Sorry if this is the wrong place of the forum to ask such question.

[EdEarl]

Hi, sorry I am unable to answer your questions. Maybe someone else can. Just wanted to welcome a new member.

[CaptainPanic]

If you heat too quickly, then the outside of your sample is at a certain temperature, but the inside is still colder.

 

This means that a particular weight loss that you register from the inside will be registered at the wrong temperature. In practice, this will mean your transitions seem spread out over a larger temperature range, simply because the inside of your sample is lagging behind.

 

But to be honest, most experiments I know of are designed such that this is hardly a problem. Samples tend to be very small, and heating rates slow.