Polar dielectrics: If a material has molecules with permanent electric dipole moments, in the absence of an external electric field, then it is called a polar dielectric e.g. Water and NaCl. Within these materials, the individual molecular dipoles are usually randomly oriented due to thermal agit...
transmission coefficient of a microwave photonic crystal that represents a structure containing alternating layers of ceramic material (Al 2 O 3 ) with a relatively large number of cavities and foam plastic are studied in the presence and absence of distortions of the periodicity of a photonic ...
Piezoelectric and dielectric measurements reveal that Sr-substitution amount within a certain range will lead to the increase of piezoelectric coefficient (d33), electromechanical coupling factor (kp), and relative dielectric constant (33 T/0). At 6 mol% Sr-substitution level, the d33 and kp of...
coefficient close to that of the substrate. The optical reflectance of the metal electrode has a twofold effect. High reflectance, like that of aluminum, ensures high luminance but results in poor contrast requiring the use of contrast enhancers. Low reflectance, like that of molybdenum, means ...
Consequently, the losses in silicon do not lead to a damping of the modes but rather result in a stronger confinement of the mode in the void by virtue of increased Fresnel reflection coefficient at the air-silicon interface (increased refractive index and increased absorption). Consequently, one...
Numerically the specific inductive capacity of a dielectric is equal to the dielectric constant already mentioned. From Project Gutenberg The coefficient K is called the dielectric constant of the medium, and its value is taken as unity for air. From Project Gutenberg Take as example the chapter ...
(1–x)NdAlO3-xCaTiO3.The density of NdAlO3-CaTiO3 ceramics decreases from 4.95 g/cm3 to 4.45 g/cm3 almost linearly with increasing x value,while their particle size increases from 4 μm to 10 μm,relative permittivity εr increases from 38 to 65,temperature coefficient of resonant ...
Physical properties of the layered pnictide oxidesNa2Ti2P2O(P=As,Sb) with anti-K2NiF4 structure were characterized by magnetic susceptibility, magnetoresistance, Hall coefficient (RH), heat capacity, and thermoelectric power (TEP... R.,H.,Liu,... - 《Physical Review B》 被引量: 77发表:...
The main function of a dielectric material is to differentiate between two electric potentials. A good dielectric material can bear thermal stress (having low thermal coefficient of expansion), electrical stress (possessing high breakdown strength), mechanical stress and room temperature (ambient) ...
The temperature coefficient of its dielectric constant is negative. PP capacitors are typically used in AC and pulse applications at high frequencies. They are also used in switch-mode power supplies. The largest concern with PP films is that they have a maximum operating temperature of only 105...