Accession Number:

ADP007774

Title:

Effect of Microwave Heating on Solid State Reactions of Ceramics,

Descriptive Note:

Corporate Author:

FLORIDA UNIV GAINESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

• Ahmad, Iftikhar
• Clark, David E.

Report Date:

1992-04-27

Pagination or Media Count:

8.0

Abstract:

Solid state reaction studies were conducted on a zinc oxide-alumina system. Previous studies indicate the reaction kinetics of this system are diffusion controlled. Powder mixtures of similar particle sizes of reactants do not satisfy kinetic models either by conventional or microwave heating. With larger particle sizes of alumina, where reaction is limited by diffusion of zinc oxide through the product layer, microwave heating appears to enhance the reaction rate. An increase in compaction pressure results in an increase in the amount of product formed by conventional heating but shows a decrease in product formation with microwave heating.

Descriptors:

• *MICROWAVES
• *CERAMIC MATERIALS
• *SINTERING
• DIFFUSION
• HEATING
• KINETICS
• LAYERS
• MIXTURES
• MODELS
• OXIDES
• PARTICLES
• POWDERS
• PRESSURE
• REACTION KINETICS
• SOLIDS
• ZINC
• ZINC OXIDES
• ALUMINUM OXIDES
• PROCESSING
• SPINEL
• SYMPOSIA

Subject Categories:

• Ceramics, Refractories and Glass
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE