Cellular ceramic foam derived from potassium-based geopolymer composite: Thermal, mechanical and structural properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F21%3A00559334" target="_blank" >RIV/67985858:_____/21:00559334 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/21:43962277

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0264127520308911?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0264127520308911?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2020.109355" target="_blank" >10.1016/j.matdes.2020.109355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cellular ceramic foam derived from potassium-based geopolymer composite: Thermal, mechanical and structural properties

Popis výsledku v původním jazyce

Porous geopolymers have drawn widespread attention owing to the flexibility of the production processes and the diversity of their structural properties. This paper first investigates and describes the key parameters for the fabrication of ceramic foam based on a geopolymer mixture by impregnation using the replica technique. The influence of geopolymer mixture viscosity on total porosity, pore size and mechanical strength of leucite ceramic foams is evaluated. The accelerated solidification step at 70 °C was investigated using time-dependent viscoelastic parameters such as tan δ, G' and G. For the fabrication of highly porous ceramics based on the geopolymer mixture, the optimum viscosity ranges between 9 and 15 Pa.s at 100 s−1. Differential thermal analysis (DTA) and X-ray diffraction (XRD) indicated the crystallization of the main leucite phase at 1073.5 °C, during the thermal exposure up to 1300 °C. It has been revealed that ceramic foam with an open porosity of 76 to 79 vol% can be fabricated using a replica technique. Scanning electron microscopy (SEM) and X-ray micro-computed tomography (micro-CT) have confirmed interconnected macroporosity with an open pore size up to 2 mm. This study introduces a novel group of materials combining geopolymer chemistry and traditional production of ceramic foams.

Název v anglickém jazyce

Cellular ceramic foam derived from potassium-based geopolymer composite: Thermal, mechanical and structural properties

Popis výsledku anglicky

Porous geopolymers have drawn widespread attention owing to the flexibility of the production processes and the diversity of their structural properties. This paper first investigates and describes the key parameters for the fabrication of ceramic foam based on a geopolymer mixture by impregnation using the replica technique. The influence of geopolymer mixture viscosity on total porosity, pore size and mechanical strength of leucite ceramic foams is evaluated. The accelerated solidification step at 70 °C was investigated using time-dependent viscoelastic parameters such as tan δ, G' and G. For the fabrication of highly porous ceramics based on the geopolymer mixture, the optimum viscosity ranges between 9 and 15 Pa.s at 100 s−1. Differential thermal analysis (DTA) and X-ray diffraction (XRD) indicated the crystallization of the main leucite phase at 1073.5 °C, during the thermal exposure up to 1300 °C. It has been revealed that ceramic foam with an open porosity of 76 to 79 vol% can be fabricated using a replica technique. Scanning electron microscopy (SEM) and X-ray micro-computed tomography (micro-CT) have confirmed interconnected macroporosity with an open pore size up to 2 mm. This study introduces a novel group of materials combining geopolymer chemistry and traditional production of ceramic foams.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials and Design

ISSN

0264-1275

e-ISSN

1873-4197

Svazek periodika

198

Číslo periodika v rámci svazku

JAN 15

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

109355

Kód UT WoS článku

000606821000001

EID výsledku v databázi Scopus

2-s2.0-85096826821