where diis shrinkage as a percentage, and T is the peak firing
temperature in degrees Celsius. High coefficients of
determination, R2, greater than 0.97 were found for all
cases using linear models, signifying good data representation.
It is worth noting that peak firing temperatures at and above
7608C are beyond the range of the shrinkage sintering models
and were excluded during curve fitting. This is due to the
vitreous transition of the 3DP recycled glass at high
temperatures.