Process for producing open-celled, inorganic sintered foam products

US5976454A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans-Josef Sterzel · Schifferstadt, DE
• Michael Hesse · Westlake Village, US
• Andreas Kleinke · Kierspe, DE

Key dates

• Filing date: Mar 18, 1997
• Grant date: Nov 2, 1999
• Expiry date: Mar 18, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/0081
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing open-celled, inorganic sintered foam products which comprises: PA1 a. converting slip material comprising sinterable inorganic powder, a fluid, vaporizable material which makes this slip material capable of flow and, if desired, a material forming blowing gas into a foamed product in a foaming step with liberation of the blowing gas, PA1 b. subjecting this foamed product to a treatment which essentially makes the slip material incapable of flow and forms an open-pored intermediate body, with the steps a. and b. being able to proceed essentially simultaneously, PA1 c. removing material remaining from the fluid material and any further material from the intermediate body to form a green foam body, and PA1 d. sintering the green foam body to form the open-celled, inorganic sintered foam product.