Green body density variation

Yan [65] has shown that the sintered grain size distribution is similar to the initial particle size distribution. In the proceeding chapters, we have seen that green bodies may have density variations due to various sources. Such packing defects include (1) macroscopic inclusions of organic material which burns out to leave a void, (2) macroscopic voids... 

Maintaining the uniformity of compaction is vital when manufacturing electronic ceramic as density variations in the green compact can lead to density variations in the sintered body, with a resultant non-uniformity of properties. 

KEY. LETTERS INDICATE VARIATIONS OE DENSITY WITHIN GREEN BODY... 

There are several important implications of this result the TD functional theory and the Baym functional theory are versions of the many-body theory in that they invoke different trial functionals in obtaining the stationary solution of the same variational functional, namely, the action functional. The two theories explore the optimization of the action functional in terms of different functional variables the TD functional employs density, current, ion-coordinates, etc. while the -derivable theory employs the two-point functions such as the Green functions associated with electrons, ions, etc. The above demonstration shows that different optimization strategies may be employed to explore the stationar-ity of the action functional. 

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