Thank you all for the replies.
The dimension of the top plate I am looking for is around 25 X 25 cms.
We have successfully tested the temperature by winding a spring type nichrome coil on bottom part of an SS block where the path for the same is grinded of.
We have done it with an SS top sheet and due to the non uniform heating and as some chemicals tends to react on SS, we are planning to move to ceramic.
The max temperature, i.e 500 C is reached within 10 minutes on the SS sheet, almost uniformly is 25 X 25 cms. The time required to achieve desired temperature is not a big issue.
I am not an expertise in ceramic pottery or clay pottery and that is the main reason why i posted my requirement here., among the group of experts.
Pardon me, I am a newbie in this field and I need information from tip to toe., ie. starting from which ingredients are used/preferred to how much temperature is required in firing. The requirement is a single use., maybe for 2 equipments. So I am not looking for any costlier investments on machines for this. There are such equipments already been in market and can be bought off the shelf, but my requirement needs some customization and no vendors will entertain such customizations for low volume orders unless they sees some business potential in it.
An example of a standard equipment is in the web link given below.
Kindly have a look. Awaiting your valuable replies.. Thanks in advance,