Tape casting of magnesium oxide.

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

关键词: BINDERS;    CASTING;    CERAMICS;    HEAT TREATMENTS;    LASERS;    MAGNESIUM OXIDES;    MILLING;    MIXTURES;    MORPHOLOGY;    OPTIMIZATION;    ROUGHNESS;    SINTERING;    THICKNESS Ceramics-Analysis.;    Magnesium oxides.;    Casting-Techniques.;   

DOI  :  10.2172/946584
RP-ID  :  SAND2008-0528
PID  :  OSTI ID: 946584
Others  :  TRN: US200903%%971

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 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.