What is the metastable region?
The metastable zone in solution crystallization is typically defined as a region of the phase diagram in which no appreciable nucleation occurs. Existing theoretical explanations attribute the appearance of this zone to the low probability of nucleation brought forth by the path-dependency of the nucleation rate.
What is the metastable limit?
The metastable limit is defined as the concentration of a supersaturated solution (or a supercooled vapor) at which nucleation will proceed spontaneously and rapidly.
What is metastable state in crystallization?
A metastable state describes a phase in which an energy barrier must be surmounted before that phase can be transformed to one of lower free energy. While first- and second-order transitions are typically reversible by changing the temperature, transitions from a metastable to a more stable phase are not.
What is metastable crystallization limit?
Develop well-controlled crystallization processes The metastable zone width is defined as the zone between the solubility curve (clear points) and the metastable limit curve (cloud points) and provides essential information for developing well-controlled crystallization processes.
What is metastable solution?
A metastable state is a state in which a solution exists at an energy level above the energy level of a stable state and if the solution gets a small amount of more energy, it can transit from metastable back to stable state.
What is the meaning of metastable state?
metastable state, in physics and chemistry, particular excited state of an atom, nucleus, or other system that has a longer lifetime than the ordinary excited states and that generally has a shorter lifetime than the lowest, often stable, energy state, called the ground state.
What is metastable state in phase rule?
Thus, the state of relatively stable or metastable equilibrium is defined as the state in which a system remains for a long period of time, and any slight disturbance causing the system to deviate from the metastable state does not result in the system passing into another state.
What is metastable state of water?
Metastable States This supercool water can stay liquid, but not for a long time, and it then freezes abruptly. Such states are called metastable. They are not equilibrium states; at negative temperatures the only equilibrium state of water is ice.
What is meant by the term metastable state?
Definition of metastable state : a state of precarious stability specifically : such a state of an atom which though excited cannot emit radiation without a further supply of energy.