The Dow Chemical Company

Other

Iwao Kohatsu

Issam A Khoury

Philip E Garrou

Clayton D Wood

Robert H Heistand, Ii

A Dale Harley

Edward F Gleason

Lawrence G Duquette

Kuo Y Chang

Edward F Gleason, Iii

Larwrence G Duquette

Thin, free-standing ceramic precursor tapes are prepared from solutions comprising certain coordination complexes, thus eliminating the use of ceramic powders. The precursor tapes can be calcined to form thin ceramic sheets useful in electronic applications.

Preparation of thin ceramic sheets

A process is described for the preparation of a ceramic green body by hydrolyzing at least one alkoxide selected from each of two specified groups to form a dispersion of their reaction product, concentrating the dispersion to a sediment without drying it, and admixing a binder and a plasticizer with the sediment to make a ceramic slip formulation. A release agent can optionally be admixed. The slip formulation is then cast as a ceramic green body. The proportions of alkoxides can be adjusted, as desired, to produce a ceramic green body which is dielectric and useful for microcapacitors or as a conductor.

Dispersion process for ceramic green body

High molecular weight polyethylene glycol monoethers are cleaved to prepare lower oligomeric reaction products by contacting a mixture of the high molecular weight polyethylene glycol monoether and water with a hydrolytic cleavage catalyst such as alumina at elevated temperatures.

Cleavage of polyethylene glycol ethers by hydrolysis

An improved, flexible, strong, thin precursor green tape for dielectric ceramics is described. The tape is prepared from a cellulosic resin of specific characteristics. The tape is especially useful in the preparation of multilayer capacitors and related electronic devices.

Thin tape for dielectric materials

A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide on a core support, then calcining the support.

Catalysts having alkoxide-modified supports and method of increasing the

Preparation of a ceramic green body by hydrolyzing two groups of alkoxides to form a dispersion of their reaction product, concentrating the dispersion to a sediment without drying it, and admixing a binder solution, plasticizer and release agent with the sediment to make a ceramic slip formulation. The slip formulation is then cast as a ceramic green body. The proportions of alkoxides can be adjusted to produce a ceramic green body which is dielectric and useful for microcapacitors.

An improved, flexible, strong, thin precursor green tape for dielectric ceramics, the tape being prepared from ethylcellulose of specific characteristics. The tape is especially useful in the preparation of multilayer capacitors and related electronic devices.

A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide salt on a core support, then calcining the support.

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Lexington, MA, United States of America

Iwao Kohatsu