Bending strength test for cylindrical specimen

The three-point bending strength test is generally used to control the quality of a material. This test is not really a test for membrane characterization but only 

The principle consists in setting the sample on two supports and applying a stress until the sample fractures, as is shown in Fig. 5.17. 

The stress and the strain are measured and allow determination of the mechanical resistance of the material as a function of the firing temperatiure. It is easier to prepare cylindrical samples by extrusion. The length-to-diameter ratio is always taken higher than 10. The fracture stress is defined by the equation  

In conclusion, it can be stated that the extrusion technique is the most important method of preparing ceramic supports, because the tubular configuration is the most common configuration. In the literature, there are an increasing 

5 — CERAMIC PROCESSING TECHNIQUES OF SUPPORT SYSTEMS FOR MEMBRANES SYNTHESIS 

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