Development of Magnetic Resonance Imaging Technology for Imaging Binder Distribution in Ceramics.

摘要

Nuclear Magnetic Resonance (NMR) Technology is being developed as a method to characterize the distribution of organic binder/plasticizers in injection molded ceramics. Garrett Ceramic Component Divisions GN-10 Si sub 3 N sub 4 in the material being studied. Binder loadings studied varied from 2-20 wt%. NMR spectroscopy data showed that NMR signals correlate to binder content. However, imaging data show that there is a peak value at 15.5 wt%. NMR relaxation phenomenon, e.g., T sub 2 , does not vary with magnetic field strength, but does vary with temperature. For the present text setup, i.e., a 2T system with 3G/cm gradient, there is a limit of about 1-mm in spatial resolution. Higher gradients and changes in data acquisition techniques will significantly improve this limit. 18 refs., 11 figs., 1 tab.