Effect Of H2O On Dielectric-Properties Of Berlinite .1. Dielectric-Constant
Abbreviated Journal Title
J. Phys. D-Appl. Phys.
Quartz; Defects; Water; Alpo4; Mgo; Physics, Applied
The dielectric constants of a series of hydrothermally grown berlinite crystals containing increasing amounts of H2O were determined using a two-terminal method and empirically determined edge corrections with kappa11T ranging from 4.67 to 4.86 and kappa33T from 4.54 to 4.76. The extrapolated values for 'dry' berlinite are kappa11S = kappa33S = 4.55. Infrared studies of these crystals show bands at 4400 and 5200 cm-1 which are attributed respectively to hydroxyl ions and macroscopic and microscopic inclusions of the 6-7 M HCl/H3PO4 growth medium. The hydroxyl ions are believed to result from terminal P-OH groups at the surfaces of inclusions or as (4H)Al or (3H)Al hydroxyl nests. The OH- groups have a negligible influence on the dielectric constant, whereas the inclusions are responsible for the increase in kappa11S and kappa33T to 4.8 over the dry value of 4.55.
Journal of Physics D-Applied Physics
"Effect Of H2O On Dielectric-Properties Of Berlinite .1. Dielectric-Constant" (1993). Faculty Bibliography 1990s. 907.