A reciprocating compressor is a positive displacement machine that uses a piston driven by a crankshaft to deliver gases at high pressure. Innovations in the field of compressors paved way for the invention of modified types of compressors like screw compressors and scroll compressors. They replaced the conventional reciprocating compressors in many fields like refrigeration due to their compact size and higher efficiencies. However, reciprocating compressors are still being used in some industrial applications due to their peculiar properties suited for these areas. One of the factors that affect the efficiency of compressor is the time taken for a complete cycle of process. If we can reduce the time, we can improve the efficiency. Although it is possible to reduce the time taken for suction stroke as well as compression stroke, it is not possible to reduce the time of compression stroke without increasing the power input. However, we can reduce the time taken for the suction stroke where less power is required as compared to compression stroke. Our fundamental aim is to reduce the overall cycle time of the compressor by incorporating quick return mechanism in it. The quick return mechanism can reduce the time for suction stroke thereby increasing its efficiency.
A detailed study on the structural and dielectric characterization of the Nd doped SrTiO3 ceramics at radio frequencies were conducted in this paper. Sr1-xNdxTiO3 (x from 0 to 0.13) ceramics were synthesized using the conventional solid state ceramic route and the phase purity was confirmed through XRD analysis. XRD patterns of the ceramics showed almost similar peaks with no additional phases. A reduction in the lattice parameter can be observed with increase in the Nd content, which can be attributed to the possible lattice shrinkage due to the substitution by a smaller sized ion. The SEM images also showed a reduction in grain size which can be due the fact that Nd doping induces Sr and Ti vacancies in the system which inhibits the grain growth. The dielectric characterization at 1 MHz was done and optimal values of εr=5496 and tanδ=0.0925 were observed at x=0.1. Thus the synthesized ceramics can be used for energy storage applications.
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