Please check these related RG threads: https://www.researchgate.net/post/What_is_the_difference_between_Annealing_Calcination_and_Sintering_process https://www.researchgate.net/post/What_is_the_difference_between_annealing_sintering_and_calcination https://www.researchgate.net/post/What_is_the_difference_between_sintering_and_calcination