In situ carbothermal reduction/nitridation carbon-nano powder added geopolymer composites

Cengiz Bagci, Greg Kutyla, Waltraud M. Kriven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Geopolymer was prepared by mixing metakaolin (Al2O3.SiO2) with sodium water glass solution and then the activated carbon nano powder was added the geopolymer. To determine the best composition for carbothermal reduction, one series geoploymer was made with and without carbon by hand. The viscous and homogenous slurry was poured into a mold to obtain bar samples at ambient temperature and cured in a humidity-controlled, constant temperature oven at 50 °C for 24 h. The composition of Na2O·Al2O3·4.5SiO2·12H2O+9C was determined to be best for carbothermal reduction. The carbothermal reduction process of the samples were carried out in an atmosphere controlled tube furnace both under argon (denoted as CTR) and nitrogen (denoted as CTRN) flow of 5 cm3.min-1 at temperatures varying between 1450-1550 °C for 2h. XRD and SEM analyses were used to determine in situ transformation and morphology of all the products after CTR and CTRN. The results were briefly discussed with respect to possibility of in situ conversion of geopolymers to its carbide and nitride analogues.

Original languageEnglish (US)
Title of host publicationDevelopments in Strategic Materials and Computational Design V
Subtitle of host publicationCeramic Engineering and Science Proceedings
EditorsCharles Lewinsohn, Yanchun Zhou, Jingyang Wang, Waltraud M. Kriven, Kyoung Il Moon, Taejin Hwang, Dongming Zhu
PublisherAmerican Ceramic Society
Pages15-28
Number of pages14
Edition8
ISBN (Print)9781119040439
StatePublished - 2014
EventDevelopments in Strategic Materials and Computational Design V - 38th International Conference on Advanced Ceramics and Composites, ICACC 2014 - Daytona Beach, United States
Duration: Jan 26 2014Jan 31 2014

Publication series

NameCeramic Engineering and Science Proceedings
Number8
Volume35
ISSN (Print)0196-6219

Other

OtherDevelopments in Strategic Materials and Computational Design V - 38th International Conference on Advanced Ceramics and Composites, ICACC 2014
CountryUnited States
CityDaytona Beach
Period1/26/141/31/14

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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