Microstructure and mechanical performance of porous mullite ceramics added with TiO2

Phase formation, microstructure development, and mechanical properties of kaolin‐based mullite ceramics added with Fe2O3

“…The presence of Fe 2 O 3 promoted the formation of mullite. The bulk density could reach 2.84 g/ cm 3 , together with a high flexural strength of 112 MPa and fracture toughness of 3.09 MPa•m 1/2 , as the sample with 6 wt% Fe 2 O 3 was sintered at 1550°C for 3 h.…”

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Mullite is an excellent ceramic material due to the unique properties, such as low coefficient of thermal expansion, high corrosion resistance to acid and alkali, high-temperature creep resistance, strong thermal shock resistance, high chemical and thermal stability, high permeability, and excellent mechanical properties. [1][2][3] Mullite ceramics have been widely utilized as metallurgical, glass, ceramic, and other industrial refractory materials. [4][5][6] They are also widely used as heatresistant materials, such as crucibles, protective tubes, and thermocouple tubes for electronic packaging.

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“…31,34 The presence of WO 3 accelerated the phase formation of mullite due to the generation of the liquid phase at high temperatures. 3,35,36 Svetlana et al 37 found that, with increasing temperature, solid solubility of Fe 2 O 3 in mullite was gradually increased, and solubility of up to 7.6 wt% at 1300°C. It is also reported that Fe 3+ ions could enter the crystal lattice of mullite, forming stable solid-solutions at high temperatures.…”

“…At a given sintering temperature, the bulk density exhibited a maximum with the content of Fe 2 O 3 . Specifically, the sample with 6 wt% Fe 2 O 3 sintered at 1550°C for 3 h had a bulk density of 2.84 g/cm3 , whereas the apparent porosity was minimized to 0.96%. In theAl 2 O 3 -SiO 2 -…”

Conversion of spent coffee grounds to biochar as promising TiO2 support for effective degradation of diclofenac in water

“…[ 8,12 ] In order to circumvent this inconvenience, recent studies are using supports for TiO 2 , such as glass, [ 13–16 ] polymers, [ 12,17,18 ] paper, [ 19–21 ] and ceramic and clay. [ 22–24 ]…”