Comparing Ceramics... (1 Viewer)

[CHUDYMASTER]

spectroscopes, yeah.

 

[McLake]

Originally posted by CHUDYMASTER
To conclude:

I am looking for what properties exactly?

I am going to find equipment at a university.

I am somewhat screwed, as the due date is nearing.

1) Heat absorbance (put in a hot place and test how much heat it has absorbed)

2) The spectroscope thing

Does this count as two different ones?

 

[BlackJack]

Have possible scratch resistance if you modify my stuff from above...^

 

[CHUDYMASTER]

Do I calculate heat absorbance using delta H = m*c*delta T?

 

[CHUDYMASTER]

Ugh, these ideas are all well and good to throw around, but they're not that practical dudes. I know you're trying to help, but physics doesn't end with the hsc maaan, try to be more specific if possible.

THANKS!

 

[BlackJack]

Yes, you have to find the specific heat of the ceramic for that, and calculate it.

 

[CHUDYMASTER]

How do I measure the change in temperature?

 

[McLake]

Originally posted by CHUDYMASTER
How do I measure the change in temperature?

Your not going to get it too hot for a thermometer, are you?

 

[CHUDYMASTER]

Very helpful.

 

[BlackJack]

Look, don't forget we're students too. And neither of us did an actual assignment concerning ceramic properties under heat.

You might actually think up of more specific stuff when you go to th uni and look at their equipment...

I've done Young's modulus, which is ratio of the stress to strain... this is the distance the object distorts versus the force it is applying to restore its shape... there is an actual machine to measure this at usyd, which records a graph.
The graph itself, starts on a constant slope from origin, then gradually evens out (when the material starts getting permanently bent efven if you release) and then breaks, returning to zero.
But this isn't appropriate for your assignment is it?

A change would be to apply a drill to the ceramic to test its abrasion resistance. Get the drills and leave a constant force on the ceramic for x minutes. You can measure the depth of the hole, if it does crate one, with another instrument they'll have...

You really need to discuss this with the uni staff....

 

[McLake]

Originally posted by BlackJack

I've done Young's modulus, which is ratio of the stress to strain... this is the distance the object distorts versus the force it is applying to restore its shape... there is an actual machine to measure this at usyd, which records a graph.
The graph itself, starts on a constant slope from origin, then gradually evens out (when the material starts getting permanently bent efven if you release) and then breaks, returning to zero.

You should be an engo student, BJ.

 

[CHUDYMASTER]

No, my assignment is related to the property changes after HEATING ceramics.

Are you talking about the physics department at Sydney Uni? I went there to study for the physics olympiad.

 

[BlackJack]

Originally posted by CHUDYMASTER
How do I measure the change in temperature?

What about something like back titration, where you dunk it in water of a known temperature, seal the heat in, and let it go to requilibrium. Measure the temperature change, and apply the equation to both the ceramic and the water.

 

[CHUDYMASTER]

Something slightly more practical?

Ugh, this is going no where.

 

[BlackJack]

Originally posted by CHUDYMASTER
No, my assignment is related to the property changes after HEATING ceramics.

Are you talking about the physics department at Sydney Uni? I went there to study for the physics olympiad.

Yeah that's okay too, but I was more thinking of the engineers that do ceramics... and the machines would be in engineering department...
Phys olympiad training program...? Last year for us.

Property changes after heating... you could do the young's stuff for both and see if there's any changes. At more heat there is more vibration in the atoms, which would affect the resistive force I presume.

Lake I will be an engo student. at uni.

 

[CHUDYMASTER]

Did you make it onto the olympics team? I did.

But I just don't know what to do for this.

 

[BlackJack]

Originally posted by CHUDYMASTER
Something slightly more practical?

Ugh, this is going no where.

Look, it's not likely to get anywhere fast, it's a research assignment...

I see no other solutions unless you want to useut the 'black body' cuirve for ceramics and use the same spectrometre to detect the temperature fom the EMR its emitting.

 

[BlackJack]

Originally posted by CHUDYMASTER
Did you make it onto the olympics team? I did.

But I just don't know what to do for this.

Us? We didn't even make it past the entrance exam. Me = We'll give you this piece of paper titled 'High Distinction', now scram.
I thought they decide the team members and the reserve at the end of the year after the second stage (training school @ someplace)...

 

[CHUDYMASTER]

That's the whole idea. Anyway, if you guys can think of anything else, that'd be good.

I'd better go and study and such elsewhere.

 

[Ronnie]

ummm suggestion to measure heat absorption....

1. Heat the ceramics for a given period of time

2. put the ceramics in a beaker of water

3. measure the change in the temperature of water, this will give you the heat absorption of the ceramic!

4. what was so hard about that?