Numerical Simulation and Experimental Verification of Dry Pressed MgTiO 3 Ceramic Body during Pressureless Sintering

2021 ◽  
Author(s):  
Jiang Wang ◽  
Yu Ni ◽  
Kai Liu ◽  
Yanying Du ◽  
Wei Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Verification ◽  
Ceramic Body ◽  
Pressureless Sintering

scholarly journals Numerical Simulation and Experimental Verification of Dry Pressed MgTiO3 Ceramic Body during Pressureless Sintering

2021 ◽  
Author(s):  
Jiang Wang ◽  
Yu Ni ◽  
Kai Liu ◽  
Yanying Du ◽  
Wei Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Grain Size ◽  
Relative Density ◽  
Ceramic Body ◽  
Simulation Method ◽  
Shrinkage Rate ◽  
Pressureless Sintering ◽  
Numerical Simulation Method ◽  
Average Grain Size ◽  
Simulation Results

Abstract To clarify the densification law of dry pressed MgTiO3 ceramic body during pressureless sintering, SOVS model modified with creep characteristics was embedded into finite element software Abaqus. The selected model can effectively express the grain boundary characteristics and densification mechanism. The change law of relative density, shrinkage rate, sintering stress and grain size of MgTiO3 cylindrical specimens were investigated by the above numerical simulation method. It showed that the average relative density of ceramic body rose from 60% to 97% and the shrinkage rate resepectively reached 17.28% and 11.99% in axial and radial direction. The average grain size increased from 1μm to 6 μm. In order to verify the accuracy of the simulation results, corresponding sintering experiments on cylindrical specimens were carried out to obtain actual sintering densities and shrinkage rates. It showed that the errors of relative density and shrinkage is below 5% and 2%. Grain growth trend was also basically consistent with the simulation results. After that, the above numerical simulation method was applied into the prediction of fabricating MgTiO3 filter with complex structure. Therefore, the present work provided a reliable numerical simulation method to predict the densification behavior of MgTiO3 ceramics during the pressureless sintering process, which was helpful to design and fabricate microwave dielectric products.

scholarly journals Numerical simulation and experimental verification of gas streams feeding a gliding discharge plasma reactor

2013 ◽  
Vol 61 (2) ◽  
pp. 24321
Author(s):  
Teresa Opalińska ◽  
Małgorzata Majdak ◽  
Janusz Piechna ◽  
Witold Selerowicz ◽  
Bartłomiej Wnek
Keyword(s):  
Numerical Simulation ◽  
Experimental Verification ◽  
Discharge Plasma ◽  
Plasma Reactor ◽  
Gas Streams ◽  
Gliding Discharge
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