Electroacoustic Analysis in Processing of Advanced Ceramics

Published

September 1, 1998

Author(s)

Vincent A. Hackley, U Paik

Abstract

Finely dispersed systems such as emulsions and colloidal suspensions are recognized as playing a critical role in many important industrial processes. Many of these systems are quite concentrated, and significant needs exist to develop measurement techniques for probing the physical and chemical properties of these systems and processes. Meeting such needs has set forth numerous technological challenges. These challenges have been underscored by the increasing demand for nondestructive evaluation and on-line monitoring capabilities in intelligent processing applications. Conventional methods, such as laser diffraction and single particle counting, generally fall short in practical applications because of their limitations to dilute systems.Recent advances in the use of high-frequency electric and acoustic fields have led to the development of commercial instrumentation for characterizing nondilute dispersed systems. However, these emerging techniques are often unfamiliar to researchers and process engineers. Furthermore, there are no comprehensive texts currently available which specifically address the theory and application of these measurements. The objective of this volume is to present a series of reviews and expositions that give a thorough and well-rounded exposure to these techniques and the attendant measurement fundamentals. These contributions have also been selected so as to illustrate the application of these techniques in the characterization of a wide variety of material and process applications.The papers herein were contributed by participants at an International Workshop on Ultrasonic and Dielectric characterization Techniques for Suspended Particulates, held at the National Institute of Standards and Technology in Gaithersburg, Maryland, on August 4-6, 1997. This workshop began with the simple notion of bringing together at one time participants from academia, government, and industry, including instrument manufacturers, theoreticians, applications development specialists, and current and potential users of this technology, to stimulate communication and interaction in this rapidly emerging, but highly fractured, area. This volume is organized by topic with collections of papers emphasizing each of the following areas: fundamental aspects, measurements in concentrated systems, sensor development and process control, inorganic systems applications. Measurement techniques include electrokinetic sonic amplitude, colloid vibration potential, ultrasonic attenuation, ultrasonic velocity, and dielectric spectroscopy.This workshop and these proceedings required the involvement and efforts of a number of individuals and organizations. We would like to express our gratitutde to the National Institute of Standards and Technology, The American Ceramic Society, and the Division of Colloid and Surface Chemistry of the American Chemical Society for co-sponsoring the workshop. We also gratefully acknowledge the donors of the Petroleum Research Fund, Eastman Kodak Company, Dispersion Technology Inc., and Malvern Instruments Inc., for financial support of the workshop. This support made it possible for the participation at the workshop to be truly global. Additional thanks are extended to Kathy Kilmer, Tammie Grice, and the Public and Business Affairs Division at NIST, for their tireless efforts behind the scenes, which allowed this converence to run smoothly. Most importantly, the success of this endeavor rests largely upon the shoulders of the workshop participants, particularly the speakers, who brought with them the ideas, insight, experience, and critical perspective necessary for such an undertaking. We especially thank the authors for the high quality of their contributed manuscripts and for their active participation in the peer review process, which made our job much easier. Finally we express our appreciation to Sarah Godby, Mary Cassells, and other individuals in the publications departm

Citation

American Ceramic Society Bulletin

Pub Type

Journals

Keywords

ceramic powders, electroacoustic, electrophonetic mobility, ESA, zeta potential

Citation

Hackley, V. and Paik, U. (1998), Electroacoustic Analysis in Processing of Advanced Ceramics, American Ceramic Society Bulletin (Accessed October 31, 2024)