Sintering behavior of nanostructured β-CPP powder obtained from avian eggshell waste

Authors

• Bruno Silvano Silva
• Tarcília Henrique Amaral Correa
• Rômulo Leite Loiola
• José Nilson França Holanda

Publication Date

2022

Abstract

In this work the sintering behavior of a nanostructured b-calcium pyrophosphate (b-CPP) powder derived of avian eggshell waste was investigated. The b-CPP pellets were prepared by uniaxial pressing and sintered in air for 2h at temperatures ranging from 600℃ to 1200℃. The sintering behavior was evaluated in terms of linear shrinkage, water absorption, apparent porosity, apparent density, tensile strength, FTIR (Fourier-transform infrared) analysis, and microstructural analysis via SEM (scanning electron microscopy). The results showed that the nanostructured b-CPP powder presented different behaviors with increasing sintering temperature. It was found that sintering at higher temperatures led to greater densification of the b-CPP pellets (92.56% of theoretical density when sintered at 1000℃). However, SEM micrographs of the fractured surfaces of the sintered β-CCP pellets showed the presence of micro-cracks that negatively impact the mechanical strength. Hence, it was concluded that the sintering temperature of 900℃ was found to be the most suitable in terms of densification, mechanical strength, and sintered microstructure for the production of b-CPP bioceramic pellets derived of avian eggshell waste for potential medical application.

DOI

10.55713/jmmm.v32i1.1171

First Page

86

Last Page

92

Recommended Citation

Silvano Silva, Bruno; Amaral Correa, Tarcília Henrique; Leite Loiola, Rômulo; and França Holanda, José Nilson (2022) "Sintering behavior of nanostructured β-CPP powder obtained from avian eggshell waste," Journal of Metals, Materials and Minerals: Vol. 32: No. 1, Article 10.
DOI: 10.55713/jmmm.v32i1.1171
Available at: https://digital.car.chula.ac.th/jmmm/vol32/iss1/10