YU49386B - Process for the synthesis of silicium carbide ceramic powder - Google Patents
Process for the synthesis of silicium carbide ceramic powderInfo
- Publication number
- YU49386B YU49386B YU14798A YU14798A YU49386B YU 49386 B YU49386 B YU 49386B YU 14798 A YU14798 A YU 14798A YU 14798 A YU14798 A YU 14798A YU 49386 B YU49386 B YU 49386B
- Authority
- YU
- Yugoslavia
- Prior art keywords
- hours
- temperature
- ceramic powder
- gel
- synthesis
- Prior art date
Links
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- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Postupak sinteze keramičkog praha silicijumkarbida, naznačen time, što se u koloidnu disperziju silicijumdioksida čija je pH vrednost 9 do 10 i sadržaj SiO2 od 3 do 30 mas.%, dodaje uz mešanje na sobnoj temperaturi, odnosno od 15 do 30В°C, jedinjenje koje je nosioc ugljenika u količini koja odgovara molskom odnosu C/SiO2 od 2 do 6 i borna kiselina u količini od 0,5 do 12 mas.%, zatim se ishomogenizirana disperzija ostavi da miruje zagrejana na temperaturi od 50 do 90В°C u vremenu od 2 do 10 sati radi stvaranja gela, potom se stvoreni gel suši na temperaturi od 100 do 200В°C u trajanju od 15 do 30 časova, nakon sušenja gel se deaglomerira i žari u inertnoj atmosferi na temperaturi od 900 do 1200В°C u trajanju od 2 do 4 časa radi odstranjivanja vode, zatim se radi kristalizacije žari u internoj atmosferi na temperaturi od 1450 do 1650В°C u trajanju od 1,5 do 4 časa u cilju dobijanja keramičkog praha čistog silicijumkarbida. Prijava sadrži još jedan zavisni patentni zahtev.A process for the synthesis of ceramic powder of silicon carbide, characterized in that a compound which is added to the colloidal dispersion of silicon dioxide having a pH value of 9 to 10 and a SiO2 content of 3 to 30 wt. is a carbon carrier in an amount corresponding to a molar ratio of C / SiO2 of 2 to 6 and boric acid in an amount of 0.5 to 12 wt.%, then the isomogenized dispersion is left to stand warm at a temperature of 50 to 90V ° C for a period of from 2 to 10 hours to create the gel, then the created gel is dried at a temperature of 100 to 200V ° C for 15 to 30 hours, after drying the gel is deagglomerated and annealed in an inert atmosphere at a temperature of 900 to 1200V ° C for a period of 2 to 4 hours to remove the water, it is then annealed to crystallize in an internal atmosphere at a temperature of 1450 to 1650V ° C for 1.5 to 4 hours in order to obtain a pure silicon carbide ceramic powder. The application contains another dependent claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| YU14798A YU49386B (en) | 1998-04-01 | 1998-04-01 | Process for the synthesis of silicium carbide ceramic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| YU14798A YU49386B (en) | 1998-04-01 | 1998-04-01 | Process for the synthesis of silicium carbide ceramic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| YU14798A YU14798A (en) | 1999-11-22 |
| YU49386B true YU49386B (en) | 2005-11-28 |
Family
ID=47605164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| YU14798A YU49386B (en) | 1998-04-01 | 1998-04-01 | Process for the synthesis of silicium carbide ceramic powder |
Country Status (1)
| Country | Link |
|---|---|
| YU (1) | YU49386B (en) |
-
1998
- 1998-04-01 YU YU14798A patent/YU49386B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| YU14798A (en) | 1999-11-22 |
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