Title

Effect Of H2O On Dielectric-Properties Of Berlinite .1. Dielectric-Constant

Title - Alternative

J. Phys. D-Appl. Phys.

Keywords

Quartz; Defects; Water; Alpo4; Mgo; Physics, Applied

Abstract

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.

Publication Title

Journal of Physics D-Applied Physics

Volume

26

Issue/Number

1

Publication Date

1-1-1993

Document Type

Article

Language

English

First Page

93

Last Page

100

WOS Identifier

WOS:A1993KH16700015

ISSN

0022-3727

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