Work

Lightweight porous Al 2 O 3 ‐based ceramics with highly controllable performance via binder jetting

Year: 2024

Type: article

Abstract: This study introduces a feasible approach for preparing Al 2 O 3 ‐based ceramics with highly controllable performance via binder jetting. The Al 2 O 3 ‐based ceramics were prepared using Al 2 O 3 and H 3 BO 3 as raw materials. The results showed that the samples prepared with 0.24 mol H 3 BO 3 exhibited high apparent porosity (64%–66.67%), well‐bending strength (3.46–8.53 MPa), and low thermal conductivity (0.113–0.329 W·m −1 ·k −1 at 200–800°C). It was observed by an electron microscope that the increase of boric acid content led to the in‐situ formation of more aluminum borate grains in the sample. Meanwhile, the remaining Al 2 O 3 reacts with silicon oxide in the impregnation solution to form mullite whiskers. The whiskers ensured that the sample had superior mechanical properties and lower thermal conductivities. Based on the above properties, the possibility of Al 2 O 3 ‐based ceramics application in the aerospace field can be speculated.

Source: International Journal of Applied Ceramic Technology

DOI: 10.1111/ijac.14951

Authors: Jingfei Liu, Li Yang, Zhiyuan Yang, Wenming Jiang, Yuanbing Li, Zitian Fan

Institutions: State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan University of Science and Technology, State Key Laboratory of Refractories and Metallurgy

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Defense Basic Scientific Research Program of China

Awards: G1822780164, G5505937899, G5731899271