What is ink bottle effect?
In- trusion into the wide inner body will not occur until sufficient pressure is applied to force the mercury into the narrow open- ings. It will, therefore, appear as if a large volume has intruded into narrow pores. This is called the ink-bottle effect.
Why does hysteresis occur in adsorption?
The hysteresis between the adsorption isotherm and desorption isotherm is thought to be caused by the gradual desorption mechanism (percolation theory) due to the different size pores being combined.
What is hysteresis in adsorption?
In many cases of physical adsorption of vapors, it has been observed that an adsorption isotherm determined for a system does not, in general, coincide with the desorption isotherm determined on the same system at the same temperature. This phenomenon is known as hysteresis in adsorption.
What causes magnetic hysteresis in ferromagnetic materials?
The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains. In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it doesn’t.
What is hysteresis loop in catalytic adsorption?
In materials containing a portion of mesopores, a hysteresis loop is frequently observed , i.e. where the adsorbent loading and regeneration follow different paths in the adsorbed phase concentration versus partial pressure space. An example of such a hysteresis loop is illustrated in Figure 1.
What is hysteresis loss in ferromagnetic material?
Hysteresis loss is associated with the phenomenon of hysteresis and is an expression of the fact when ferromagnetic material is involved. In ferromagnetic materials, not all the energy of the magnetic field is returned to the circuit when the external field is removed.
How can hysteresis loss be reduced?
How do we Reduce Hysteresis Losses? Hysteresis losses can be reduced by using material that has less area of the hysteresis loop. Hence, high grade or silica steel can be used for designing the core within a transformer because it has extremely less area of the hysteresis loop.
What is the ink bottle effect in biology?
The ink bottle effect is probably the most important reason for hysteresis to occur and will be explained with the help of the Young and Laplace equation ( eqn [6] ). Envision a spherically shaped soil pore with two bottlenecks at opposite ends of the pore.
What is the “ink-bottle effect” of water desorption?
In the high and intermediate RH regions, the restricted water desorption has been attributed to the “ink-bottle” effect (a small-sized pore-throat controls large-sized pore body) (Ravikovitch and Neimark, 2002), such that the retained water needs much more energy to escape from the pore space (Morishige and Tateshi, 2003).
Is there homogeneous cavitation in ink bottles?
Homogeneous-like cavitation has thus been reported in materials with interconnected pores presenting cavities separated by constrictions, realizing such an ink-bottle geometry. These materials are either ordered (SBA-16 mesoporous silica [8, 10, 11], zeolites [12]) or disordered (cements [12],Vycor [13,14], controlled porous glasses [15,16]).
Does hysteresis loop shrink with increasing temperature?
The results clearly show that the hysteresis loop shrinks with increasing temperature and eventually disappears at the hysteresis critical temperature (Tch), which depends on the average pore size but lies substantially below the pore critical temperature (Tcp).