Abstract: A manufacturing line includes a tape of green material that is directed through a furnace so that the furnace burns off organic binder material and then partially sinters the tape without the use of a setter board. Sintered articles resulting from the manufacturing line may be thin with relatively large surface areas; and, while substantially unpolished, have few sintering-induced surface defects. Tension may be applied to the partially sintered tape as it passes through a second furnace on the manufacturing line to shape resulting sintered articles.

Abstract: A magnesium aluminate spinel nanopowder including: a particle size of from 200 to 800 nm; a median particle size of from 200 to 400 nm; and a surface area by BET is from 2 to 10 m2/g. Also disclosed is a method of making the nanopowder by co-precipitation and methods of use thereof, as defined herein.

Abstract: A translucent alumina substrates, as defined herein, are disclosed along with methods of making translucent alumina substrates via such methods as tape casting. The translucent alumina substrates have advantages over prior filaments due to their quality, including total transmittance, and surface qualities, along with the simplicity of making these materials via scalable processes, such as tape casting.

Abstract: A transparent, tape casted, spinel article, as defined herein. Also disclosed is a method of method of making the tape casted, transparent spinel, and laminates of the tape casted. transparent spinel, as defined herein.