Abstract
Aluminum borates are synthesized via a precipitation process. Aluminum nitrate and calcium hexaboride (CaB6) as a source of B2O3 were used. Various proportions of aluminum nitrate were mixed with CaB6 powder and to a solution of ammonium hydroxide. The resulting mixtures were evaporated and calcined up to 650°C. A porous ceramic with a framework structure of aluminum borate whiskers was synthesized in situ by firing the green compact bodies up to 1400°C under argon gas avoiding the oxidation of the CaB6. The structure and morphology were investigated by XRD and SEM. The results indicate that whiskers exhibit a well-crystallized structure with an average diameter distribution of about 500 nm and lengths ranging from 5 to 8 μm. Porous aluminum borate ceramic consisted of whiskers with a porosity of 9–21% for samples sintered up to 1400°C. Increasing the sintering temperature to 1500°C and CaB6 addition (15 wt%) deteriorated both the flexural strength and modulus of elasticity of the ceramic bodies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Applied Ceramic Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
