| RESEARCH PAPER |
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| Study on Liquid Phase Migration During Freeze-form Extrusion Fabrication of Ceramic Materials |
| YAN Cunfu1, 2, LI Shujuan1
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1 School of Mechanical and Instrumental Engineering, Xi'an University of Technology, Xi'an 710048;
2 School of Mechanical Engineering, Huanghe S&T College, Zhengzhou 450063; |
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Abstract Influences of extrusion parameters on liquid content of extrudate for freeze-form extrusion fabrication of aqueous ceramic pastes were analyzed by the orthogonal test. In the test, extrusion parameters including the extrusion velocity, the extrusion nozzle length, the extrusion interval time were examined, while the liquid content of extrudate was used as the evaluation index of extrusion process. The analysis of range and variance of test data indicates that liquid phase migration during extrusion process becomes large with the increasing of the extrusion interval time and the extrusion nozzle length, and the decreasing of the extrusion velocity. The significance order of factors are as follows: the extrusion velocity>the extrusion nozzle length>the extrusion interval time. At the same time, the prediction model between the liquid content in extrudate and the parameters was established. By comparing the results of orthogonal experiment and prediction model calculation, it can be inferred that the relative error between the value of the prediction model calculated and the experiment measured is 1.410% under the test condition, the prediction model could be used to predict the liquid migration in extrusion process.
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Published: 25 February 2018
Online: 2018-02-25
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2018, Vol. 32 
