ii. Explain the calculation of true density with the help of a pycnometer iſ the mass of empty pyenometer, mass of pycnometer with the sample, and mass of pycnometer with the fluid and the sample are given .
Answers
Answer:
The pycnometer density of the powder provides the theoretical density of the powder and can also provide an indication of issues with internal voids within a powder. For example, if a drop of pycnometer density is observed either within different particle size cuts or from lot to lot, a likely cause could be internal voids due to the fabrication technique. The pycnometer density also provides a practical test to evaluate the powder for any gross changes from lot to lot. Furthermore, the pycnometer density is used when determining the proper powder/polymer mixture or feedstock. Both the powders and polymers can be evaluated by pycnometer density to obtain the proper solids loading in a mixture for predictable shrinkage. For example, the knowledge of the material density allows the weight of the constituents to be used to prepare a feedstock with accurate volumetric solids loading. Typically, tooling size is determined by accurate solids loading and final sintered density; thus, pycnometer density is an essential first step for accurate feedstock determination and can be utilized to minimize the number of iterations required to obtain accurate shrinkages for tooling.
Explanation:
the calculation of true density with the help of a pycnometer iſ the mass of empty pyenometer, mass of pycnometer with the sample, and mass of pycnometer with the fluid and the sample are given .