Sandvik Ab

Other

St. Jude Medical Ab

Westin, Gunnar

Ekstrand, Asa

Pohl, Annika

Gunnar Westin

Annika Pohl

Mats Nygren

Asa Ekstrand

Kenth A Nilsson

Stefan S Ederyd

Tom Eriksson

Anna-Karin Johansson

Koroush Lashgari

Udo K Fischer

Mats G Waldenstrom

Karin Ljungström

Karin Lungstrom

Enrico Galli

Åsa Ekstrand

ANGsa Ekstrand

A method for producing a biocompatible material of the formula NaKNbO, 0&#x2266;x&#x2266;0.8, 0.2&#x2266;y&#x2266;1, x+y=1 includes the steps of a) providing a Na-precursor and a K-precursor for NaKNbO, b) mixing the precursors in solution wherein said precursors first react to form a sol and thereafter a gel, c) heat treating the gel to obtain an oxide of the material NaKNbO, 0&#x2266;x&#x2266;0.8, 0.2&#x2266;y&#x2266;1, x+y=1. The material can be produced as a film, and the material or film can be provided on the exterior surface of a medical implant that will come into contact with body tissue and/or body fluids upon implantation thereof.

Method for producing a piezoelectric film

Synthesis of sodium potassium niobate by sol-gel

A novel solution route has been developed that after heat-treatment to 500-600&#xb0; C. under inert atmosphere, yields highly porous composites of nano-sized metal (Ni) particle inclusions in ceramics (AlO). Metal loadings could be made from &#x3c;1% to &#x3e;95% Ni. The metal inclusion sizes in the Ni&#x2014;AlOsystem with the 10 atom % Ni sample were 4-7 nm, while for the 75 atom % Ni sample they were 5-8 nm. It was shown that the 10 atom % Ni sample could be used as a catalyst for the conversion of COand CHin the temperature range 550-700&#xb0; C., while higher temperatures led to growth of the Ni particles and carbon poisoning over time. The solution routes could also be deposited as thin dense films containing &#x3c;10 nm Ni particles. Such films with high Ni-particle loadings deposited on aluminium substrates have shown very good solar heat absorber proficiency and provide good substrates for carbon tube growth.

Composite materials and method of its manufacture

Method of coating cutting inserts

A method of making a hard constituent powder coated with at least one iron group metal, Me, by dissolving and complex binding at least one of Me.sub.n (NO.sub.3).sub.m and Me.sub.n (SO.sub.4).sub.m and other similar Me.sub.n --X.sub.m compounds containing X-groups with low or no carbon content, preferably Me-nitrates, solely or together with one or more metal salts of at least one iron group metal containing organic groups in at least one polar solvent with at least one complex former comprising functional groups in the form of OH or NR.sub.3, (R=H or alkyl). Hard constituent powder is added to the solution. The solvent is evaporated and remaining powder is heat treated in an inert and/or reducing atmosphere. As a result, coated hard constituent powder is obtained which after addition of a pressing agent can be compacted and sintered according to standard practice.

Method of making metal composite materials

A method wherein one or more metal salts of at least one iron group metal containing organic groups are dissolved and complex bound in at least one polar solvent with at least one complex former comprising functional groups in the form of OH or NR.sub.3, (RH.dbd.H or alkyl). Hard constituent powder and, optionally, a soluble carbon source are added to the solution. The solvent is evaporated and the remaining powder is heat treated in an inert and/or reducing atmosphere. As a result, coated hard constituent powder is obtained which after addition of a pressing agent can be compacted and sintered according to standard practice to a body containing hard constituents in a binder phase.

Growing community of inventors

Stockholm, Sweden

Gunnar Westin