Fabrication of barium titanate ceramics via digital light processing 3D printing by using high refractive index monomer |
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Authors: | Kai Liu Chenyang Zhou Jiaming Hu Song Zhang Qingqing Zhang Ce Sun Yusheng Shi Huajun Sun Changxia Yin Yuzhen Zhang Yu Fu |
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Affiliation: | 1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, Hubei, China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, Hubei, China;3. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China;4. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, Hubei, China;5. Advanced Ceramics Institute of Zibo New & High-Tech Industrial Development Zone, Zibo, 255000, China |
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Abstract: | A digital light processing (DLP) technology has been developed for 3D printing lead-free barium titanate (BTO) piezoelectric ceramics. By comparing the curing and rheological properties of slurries with different photosensitive monomer, a high refractive index monomer acryloyl morpholine (ACMO) was chosen, and a design and preparation method of BTO slurry with high solid content, low viscosity and high curing ability was proposed. By further selecting the printing parameters, the single-layer exposure time was reduced and the forming efficiency has been greatly improved. Sintered specimens were obtained after a nitrogen-air double-step debinding and furnace sintering process, and the BTO ceramics fabricated with 80 wt% slurry shows the highest relative density (95.32 %) and piezoelectric constant (168.1 pC/N). Furthermore, complex-structured BTO ceramics were prepared, impregnated by epoxy resin and finally assembly made into hydrophones, which has significance for the future design and manufacture of piezoelectric ceramic-based composites that used in functional devices. |
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Keywords: | 3D printing Digital light processing Piezoelectric ceramics Barium titanate Curing properties |
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