Paper Information

Journal:   IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING   MARCH 2014 , Volume 11 , Number 1; Page(s) 53 To 61.
 
Paper: 

THE EFFECT OF PROCESSING PARAMETERS ON SOL GEL SYNTHESIS OF P-SIC NANO POWDER

 
 
Author(s):  NAJAFI A.*, GOLESTANI FARD F., REZAIE H.R.
 
* DEPARTMENT OF MATERIALS SCIENCE AND ENGINEERING, SAVEH BRANCH, ISLAMIC AZAD UNIVERSITY, SAVEH, IRAN
 
Abstract: 

Mono dispersed nano SiC particles with spherical morphology were synthesized in this project by hydrolysis and condensation mechanism during sol gel processing. PH, temperature and precursors ratio considered as the main parameters which could influence particles size. According to DLS test results, the smallest size of particles in the sol (<5nm) was obtained at pH<4. It can be observed from rheology test results optimum temperature for achieving nanometeric gel is about 60oC. The optimum pH values for sol stabilization was (2-5) determined by zeta potentiometery. Si29 NMR analysis was used in order to get more details onfinal structure of gel powders resulted /rom initial sol.X-ray difji-action studies showed sythesized powder consists of b-SiC phase. Scanning electron microscopy indicated agglomerates size in b-SiC synthesis is less than 100 nm. Finally, TEM studies revealed morphology of b­SiC particles treated in 1500oC and after 1hr aging is spherical with (20-30) nm size.

 
Keyword(s): CARBIDES, NANOSTRUCTURES, SOL-GEL CHEMISTRY, NUCLEAR MAGNETIC RESONANCE (NMR), MICROSTRUCTURE
 
References: 
  • ندارد
 
  Yearly Visit 51
 
Latest on Blog
Enter SID Blog