Título

Refractory Ceramics Synthesis by Solid-State Reaction Between CaCO3 (Mollusk Shell) And Al2O3 Powders

Autor

JOSE GUADALUPE MIRANDA HERNANDEZ

MAYAHUEL ORTEGA AVILES

Héctor Herrera Hernández

CARLOS OMAR GONZALEZ MORAN

GEORGINA GARCIA PACHECO

ENRIQUE ROCHA RANGEL

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

Refractories - ([0862-5468]) Calcite - ([0862-5468]) Alumina - ([0862-5468]) Snail shells (mollusk shells) - ([0862-5468]) Refractory calcium aluminate ceramics - ([0862-5468]) Sintering process - ([0862-5468]) Mechanical properties - ([0862-5468]) Thermal shock resistance - ([0862-5468]) BIOLOGÍA Y QUÍMICA - (CTI)

Resumen o descripción

Calcium aluminate-based refractory ceramic was developed as an innovative refractory material, using garden snail (Helix aspersa) shells as a natural source of CaCO3. A 1:1 molar ratio mixture of CaC O3 from snail shells and commercial Al2O3 powder was prepared by means of high-energy mechanical milling. The mixed powder was compacted in cylindrical samples (disks) and consolidated by sintering at 1450°C and 1500°C for 1h. The density and porosity were evaluated using the Archimedes principle, while the mechanical properties (hardness, fracture toughness, and shear modulus) were determined by indentation and ultrasonic methods, respectively. The thermal shock resistance was tested by heating samples to temperatures between 900 and 1400°C and subsequent quenching in water at room temperature. X-ray diffraction patterns of sintered samples indicate the formation of different calcium aluminate phases, such as CaAl12O (krotite/monoclinic),CaAl4O7 (grossite/monoclinic) and CaAl2O (hibonite-5H/hexagonal). The fracture toughness and shear modulus values of materials sintered at 1450°C were higher (0.48 MPa•m1/2)) and 59 GPa, respectively than those of materials sintered at 1500°C (0.43 MPa•m1/ 2 and 55 GPa, respectively). Also changes in the bulk density, hardness and thermal shock resistance values were observed in materials sintered at 1450°C and 1500°C.

Editor

Ceramics-Silikáty

Fecha de publicación

11 de septiembre de 2018

Tipo de publicación

Artículo

Recurso de información

http://hdl.handle.net/20.500.11799/99397

Fuente

0862-5468

Idioma

Inglés

Relación

Vol. 62;4

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

310