Abstract: An abrasive article (i.e., a coated abrasive article or a three-dimensional, low density abrasive article) having a sufficient amount of vanadium oxide incorporated therein to provide having a reduced tendency to buildup static electricity during the abrading of a workpiece. Preferably, the abrasive article further comprises a compatible binder (preferably, a sulfonated polymer) to aid in securing the vanadium oxide to the abrasive article. In another aspect, a method of making the same is taught.
Type:
Grant
Filed:
June 4, 1992
Date of Patent:
April 20, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Scott J. Buchanan, Eric D. Morrison, David R. Boston, Steven T. Hedrick, William L. Kausch, Wayne K. Larson
Abstract: This invention provides a composite article comprising mullite bubbles dispersed in one of a glass matrix and a glass-ceramic matrix, and a method of making the same. The composite ceramic article of the present invention is useful in applications requiring a material having a low dielectric constant, low dissipation factor, thermal expansion properties compatible with silicon, and good mechanical strength. The composite ceramic article of the present invention is particularly useful as a substrate for thick film circuits, housings for integrated circuit assemblies (i.e., covers), and materials such as gyrotron windows, that require transparency to microwaves or millimeter waves, in addition to acceptable power transmission efficiencies.
Type:
Grant
Filed:
October 18, 1991
Date of Patent:
April 20, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A cylindrical ceramic foam body that can be the sole buoyant member of an oil-containment boom is produced by firing a mixture of fine particles of ceramic precursor, a source of carbon such as silicon carbide, and a metallic oxide. In the boom, a stack of the ceramic foam bodies, each of which is a cylinder, can be held together by wire mesh to provide a buoyant log. A plurality of the buoyant logs can be inserted end-to-end into a 3-layer loop, viz., an inner layer of a ceramic textile fabric, a middle layer of knitted wire mesh, and an outer layer of polymer-coated fabric.
Type:
Grant
Filed:
May 30, 1991
Date of Patent:
March 23, 1993
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Billy L. George, Timothy J. Gennrich, Joseph Graham