Modification of liquid phase and microstructure of sintered mullite by different additives
Source abstract
Abstract
Abstract In the field of ceramics, mullite has drawn plenty of attention due to its low thermal expansion and thermal conductivity as well as its high chemical stability and creep resistance. This work reported the mineral phase, liquid phase, and microstructure evolution of the sintered mullite, using coal‐series kaolin as the raw material and potash feldspar as well as phosphorus pentoxide as additives. The effects of K 2 O and P 2 O 5 on the content and viscosity of the liquid phase in mullite were calculated using FactSage 8.1. The results showed that the introduction of K 2 O could inhibit the formation of cristobalite effectively. Adding K 2 O and P 2 O 5 improved the content of the liquid phase formed during the calcination process. After introducing K 2 O and P 2 O 5 , mullite developed acicular and columnar structures, with average lengths of 9.76 and 7.97 µm, respectively. Furthermore, introducing K 2 O and P 2 O 5 improved the physical properties of mullite significantly.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials Science and Engineering Xi'an University of Architecture and Technology Xi'an China
Funding
National Natural Science Foundation of China · China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities
References (43)
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