alumina bubble brick

alumina bubble brick

[ə′lüm·ə·nə ¦bəb·əl ‚brik]
(materials)
A lightweight refractory brick used to line kiln walls; manufactured by passing an air jet over molten alumina to produce small hollow bubbles which are pressed into bricks and other shapes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.