I experimented multiple times in the presence of proper nitrogen flow and still got the same results.
Dear Vartika
There may be something wrong with your measurement!
Did you purgate the system before using?
Did you make the blank line before measuring?
Has the equipment been calibrated?
Visit the following page on researchgate:
Article Synthesis, sintering and dielectric properties of a BaTiO3-N...
Carlos
Thank you sir for your suggestions
yes sir, I had taken every necessary measure before starting the measurement.
Reason may be the adsorption of oxygen or nitrogen by the ceramic
The weight gainning during heat treatment might be depended on the particular properties of the constituents of the considered composite like spicemens. During heat treatment the subjected samples could be adsorbed some carrier gas like N2 or O2.
On the other hand the purity of the purge gas could be responsible for this unwanted happening. If any impurities presented in the carrier gas they could be easily adsorbed by the subjected samples.
You have to check all these crucial factors for better understanding.
There is only one explanation for weight gain in the TGA test: it adsorbs either nitrogen gas or the water impurity in the nitrogen gas.
