Self sintering ceramic composition, articles and process

摘要

A shaped ceramic article capable of being cut manually into selected sizes and process is based on a mixture of high-temperature resistant ceramic fibers and fibers which soften at temperatures below 2000 DEG F., particles of a ceramic material stable to temperatures exceeding 2000 DEG F., particles of a ceramic material which sinter at temperatures below 2000 DEG F., and a binder which provides green strength to shapes formed by vacuum formation from a slurry. The vacuum formed shape is dried at about 400 DEG F., thereby dried to form a shape which is preferably dipped in colloidal alumina or silica and dried again. The shape is sinterable by contact with flowing molten metal or by being sujected to radiant heat to form a hardened shape-stable ceramic form.