Synthesis of aluminum borate powder, fabrication and characterization of aluminum borate-based ceramics
Ceramics International, cilt.50, sa.9, ss.14987-14995, 2024 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 50 Sayı: 9
- Basım Tarihi: 2024
- Doi Numarası: 10.1016/j.ceramint.2024.01.413
- Dergi Adı: Ceramics International
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
- Sayfa Sayıları: ss.14987-14995
- Anahtar Kelimeler: Al borate powder synthesis, Densification, Dielectric properties, Mechanical properties, Thermal properties
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Al2O3/B2O3 powder mixtures prepared at various ratios from 10.7 to 54.1 wt% B2O3 were used to synthesize Al18B4O33 powders by solid state calcination at 1300 °C for 1 h. Al18B4O33 formation was completed at 44 wt% B2O3 instead of stoichiometric ratio of 13.17 wt% B2O3. In other words, B2O3-rich liquid phase accelerated Al18B4O33 crystallization. Al18B4O33 particles were not acicular in shape when first formed, but they were fully acicular for the 44 wt% and the 54.1 wt% B2O3 mixtures. Anorthite-based glass and CaO were selected to induce liquid phase sintering. CaO considerably improved densification to 95.4 % relative density at 1350 °C. Both glass and mullite also enhanced densification to 94.8 %. Epitaxial nucleation of mullite on Al18B4O33 particles resulted in a solid solution as well. Dielectric, mechanical and thermal properties of the samples were investigated and evaluated for possible applications.