what is the range of dielectric constant
Answers
Dielectric Constant
The role of dielectric constant ε of a solvent regarding its capability to dissolve ionized solutes was pointed out in Section 4.1 (the dielectric constant is typically given as the relative dielectric constant to vacuum). A higher dielectric constant of the solvent correlates with a higher ability of the solvent to dissolve salts. This property is important when using buffers as eluant in HPLC. The dielectric constant of the solvent also affects interactions in solution that involve ions and polar molecules, decreasing the intermolecular energy when the dielectric constant increases, as shown by several formulas in Sections 4.1 and 4.2. The values of the dielectric constant for several common solvents at 25 oC are given in Table 7.2.1. The dielectric constant also depends on temperature.
Dielectric constant is the ratio of the capacitance formed by two plates with a material between them to the capacitance of the same plates with air as the dielectric. For low megahertz, frequencies are less than are equal to 1,000 MHz. For high megahertz, frequencies are greater than 1,000 MHz.
Insulating materials are used in two ways: to insulate and support components of an electric system from each other and from the ground, and to function as the dielectric of a capacitor. Low dielectric constant values are preferred for high frequency or power applications to minimize electric power loss. High values of dielectric constant are recommended for capacitance applications of small sizes.