Method and means for producing solid evacuated microspheres of hydrogen
US3985841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Nov 6, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S376/916
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is provided for producing solid, evacuated microspheres comprised of hydrogen. The spheres are produced by forming a jet of liquid hydrogen and exciting mechanical waves on the jet of appropriate frequency so that the jet breaks up into drops with a bubble formed in each drop by cavitation. The drops are exposed to a pressure less than the vapor pressure of the liquid hydrogen so that the bubble which is formed within each drop expands. The drops which contain bubbles are exposed to an environment having a pressure just below the triple point of liquid hydrogen and they thereby freeze giving solid, evacuated spheres of hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.