The material is composed from different metal oxides( cao,si2o,al2o3,feo...) and was characterized thermally at TAQ600 with heating rate of 20C/m up to 900c to calculate the specific heat . As shown in the figure. I have relation between temp and heat flow(w/g) . I multiplied the column of heat flow by 3 as the heating rate is 20c/m so from the equation that Cp is dH/dT but it's not reasonable , how to calculate the Cp along the curve , the material is sensible and exothermic peak may be due to crystal phase transformation ?
First you need to make TG measurement to exclude effects associated with mass change. Surely your sample has some water from which you get effects around 100C.
Yes, i did the TGA and yes the first peak in the DSC represents the endothermic of water so we can calculate from 200 C, so how to calculate it , i divided delta H / dT , Is it correct ?
Yes, formally it is correct. Then you can try to understand what is delta H consists of using info about transformations. Finally question is what is it aimed at? Is it for simulation of technological or geological process, or you just need to get right figures (for reference maybe)?
Thanks for your reply, actually i need to calculate specific heat in order to identify the material for thermal storage applications, so it's essential to calculate it , the material consist of many metal oxides and melting temp is 1300 c , so the material behaves as sensible but also the material is sensitive in its structure which change with temp from solid phase structure to another phase.
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