- Tytuł:
- Thermal characterization of halloysite materials for porous ceramic preforms
- Autorzy:
-
Kujawa, M.
Suwak, R.
Dobrzański, L.A.
Gerle, A.
Tomiczek, B. - Powiązania:
- https://bibliotekanauki.pl/articles/2175810.pdf
- Data publikacji:
- 2021
- Wydawca:
- Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
- Tematy:
-
halloysite
DTA/TG
XRD
high-temperature microscope
linear changes
haloizyt
mikroskop wysokotemperaturowy
zmiany liniowe - Opis:
- Purpose: The aim of the study was to investigate the possibility of sintering raw (natural) halloysite and pure halloysite to produce porous ceramic preforms, and determination of sintering temperature based on the results of investigations into thermal effects, linear changes and phase transitions. Design/methodology/approach: Due to mullitisation ability of halloysite at high temperature, alternative applications based on the sintering technology (including the production of reinforcement of metal matrix composites) are being searched for. Pure halloysite and Dunino halloysite were selected for the study. Findings: Pure halloysite, characterized by low impurities, dimensional stability during sintering, softening temperature above 1500ºC and ability to transform into mullite at temperatures above 950ºC could be used as a base for the production of sintered, porous mullite preforms. Research limitations/implications: Presence of impurities in Dunino halloysite, contribute to the shift of the sintering temperature towards lower temperatures and caused a rapid and uncontrolled shrinkage of the sample and the appearance of the softening temperature at 1300ºC. Practical implications: Based on the research of thermal (DTA/TG, linear changes in high-temperature microscopy) and XRD studies it is possible to determine the sintering temperature of pure halloysite to manufacture the porous mullite preforms with open porosity. Originality/value: The received results show the possibility of obtaining the new mullite preforms based on pure halloysite.
- Źródło:
-
Archives of Materials Science and Engineering; 2021, 107, 1; 5--15
1897-2764 - Pojawia się w:
- Archives of Materials Science and Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł