Tape casting of magnesium oxide.

Ayala, Alicia ; Corral, Erica L. ; Loehman, Ronald E. ; Bencoe, Denise Nora ; Reiterer, Markus ; Shah, Raja A.

Sandia National Laboratories

关键词: Magnesium Oxides.;    Casting;    Ceramics-Analysis.;    Binders;    Thickness Ceramics-Analysis.;   

DOI  :  10.2172/946584
RP-ID  :  SAND2008-0528
RP-ID  :  AC04-94AL85000
RP-ID  :  946584

美国|英语

来源: UNT Digital Library

【 摘 要 】

A tape casting procedure for fabricating ceramic magnesium oxide tapes has been developed as a method to produce flat sheets of sintered MgO that are thin and porous. Thickness of single layer tapes is in the range of 200-400 {micro}m with corresponding surface roughness values in the range of 10-20 {micro}m as measured by laser profilometry. Development of the tape casting technique required optimization of pretreatment for the starting magnesium oxide (MgO) powder as well as a detailed study of the casting slurry preparation and subsequent heat treatments for sintering and final tape flattening. Milling time of the ceramic powder, plasticizer, and binder mixture was identified as a primary factor affecting surface morphology of the tapes. In general, longer milling times resulted in green tapes with a noticeably smoother surface. This work demonstrates that meticulous control of the entire tape casting operation is necessary to obtain high-quality MgO tapes.