Massive crystalline aluminosilicate with expanded structure and process for its manufacture
US4797377A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1988 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Jan 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C11/007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a novel crystalline massive aluminosilicate with an expanded structure and to its process of manufacture. The particular structure is a closed cell structure containing nitrogen. It is obtained by: grinding industrial glass; adding aluminum based nitride in the proportion of 0.1 to 20% by weight with respect to the weight of the ground industrial glass; mixing the ground glass and so-added nitride; oxidizing the nitride within said mixture by heating to a temperature of 800.degree. to 1000.degree. C. for about 1 hour, and cooling and recovering the expanded crystalline aluminosilicate. The material has multiple applications in the building industry and in the construction of furnaces, in the manufacture of fireproof walls and doors, and in naval construction, with various advantages over prior art materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.