In:
Journal of the American Ceramic Society, Wiley, Vol. 105, No. 10 ( 2022-10), p. 6013-6022
Abstract:
Ceramic foams constructed by aqueous‐based foam templating have demonstrated great potential in industrial and research applications. However, a multiple‐phased suspension with inherently improved complexity inevitably leads to a severe deterioration of foam stability. Herein, we proposed a colloidal co‐assembly strategy that introduces Al–Al 2 O 3 dual‐phased particles for constructing ultralight yet mechanically robust cellular ceramics. Owing to the Al 2 O 3 oxidation layer on Al particles, both of Al and Al 2 O 3 suspensions demonstrated similar zeta potential and rheological properties, enabling a stable foam structure after colloidal co‐assembly. High‐temperature oxidation of Al particles contributed to the reinforcement of cell wall and formation of Al 2 O 3 whiskers. The calcined products demonstrated a lightweight structure (0.31 g cm −3 ), a robust compressive strength (3.64 MPa) at a porosity level of 88.5%, and a relatively high specific surface area (14.7 m 2 g −1 ). The current strategy paves the way for the construction of high‐performance ceramic foams for a broad range of applications.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.v105.10
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
Permalink