Precursor of amorphous carbon molded article
US5747631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1994 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/524
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A phenolic resin molding material for molding a precursor of an amorphous carbon molded article which comprises a particulate phenolic resin having thermal plasticity coated with a low-surface tension substance containing no metallic substance; a transparent precursor of an amorphous carbon molded article which comprises a homogeneous phenolic resin homogenized by molding under a highly flowing state and has few large voids and a low metal content; a process for molding the precursor which comprises molding the phenolic resin molding material with its water content being controlled by molding, i.e., kneading followed by shaping under a highly flowing state, such as transfer molding, extrusion, injection molding or injection compression molding; and a process for producing an amorphous carbon molded article which comprises carbonizing the precursor by burning. The amorphous carbon molded article produced by the present invention is suitably used as crecibles or Raschig rings in the fields of metallurgical and chemical industries, and as plasma etchers, susceptors or substrates of electronic parts in the electronic industry field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.