1. Green gelcasting of CaCu3Ti4O12 ceramics
- Author
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Junrong Luo, Tao Meizhen, Wen-Xiang Yuan, Wenhua Tang, Hailin Cao, Tai Qiu, and Wei Wan
- Subjects
010302 applied physics ,Materials science ,Green body ,Dielectric ,Pressureless sintering ,Condensed Matter Physics ,Rice flour ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,visual_art ,0103 physical sciences ,visual_art.visual_art_medium ,Dry pressing ,Ceramic ,Electrical and Electronic Engineering ,Composite material - Abstract
CaCu3Ti4O12 (CCTO) ceramics with desirable dielectric properties were prepared by a green gelcasting forming method combined with pressureless sintering. A non-toxic natural macromolecule, glutinous rice flour (GRF) was used as the gelling agent for the gelcasting process. The significant parameter, namely, the dosage of gelling agent was carefully studied so as to optimize the gelcasting process. The results showed that the dosage of GRF had evident effect on both gelcasting process and the final dielectric properties of CCTO ceramics. CCTO ceramics from the green body solidified with 3.5 wt% GRF showed relatively optimal dielectric properties, namely a dielectric constant up to 1.60 × 104 and a loss of only 0.063 (at 1 kHz test frequency). CCTO ceramics fabricated by this green gelcasting method have superior dielectric properties compared with that of the ceramics obtained by the dry pressing method.
- Published
- 2020