That what i did,i told you,exactly,what i am trying to do:
I would like to braze small items on 1-2 chamotte bricks
and i focused the question a bout the efficiency of thicker brick vs thinner one
refer to their thermal conductivity.(in order to decrease heating lost when brazing the item).
Refer to your question:i am doing it at home(not often)a it is not for work.
I am just torch brazing by hand and need a flat spot to work on.
It is not an oven,It should be a surface of 1-2 chamotte bricks and the small items should be directly on them to be braze.
What items?any small items.I am not a jeweler,but it should be used to braze items with the same size.it can be small items/parts from tools,machines,cars bicycles etc.that might need to be fixed.I just prepare the area,nothing is broken,right now.
OK.Are you happy now
,though,that information is not needed for answer my question.
Anyway,i made more search in google and i found out,that the densed chamotte bricks are not suitable for my purpose,since they act like an heatsink,they absorb the heat,while i need the opposite situation.
So,i found out,also,that i need the"insulating lightweight fire bricks",which are the actually ones which have the low thermal conductivity(reflect the heat)and might be the ideal surface for the items.
What do you think?