Sol‐Gel Processing of Alumina‐Zirconia Fibers

Chandradass, J.; Balasubramanian, M.

doi:10.1002/9781118408353.ch1

Cited by 5 publications

(6 citation statements)

References 28 publications

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“…As shown in Fig. 3(a), the band observed at 1420 cm −1 corresponds to Al-OH bonding mode [8]. The stretching modes of Al-O-Al linkages are observed at 620 and 816 cm −1 [9].…”

Section: Resultsmentioning

confidence: 83%

Synthesis and Characterization of Rich Silica Mullite Fibers by Sol–Gel Method Using Aluminum Lactate and Silica Sol

Tan¹,

Ding²,

Yang³

2011

Advanced Composite Materials

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Rich silica mullite fibers were prepared from an aqueous solution of aluminum lactate and silica sol by the sol-gel method, in which the Al/Si molar ratio of fibers was 0.64. The aluminum lactate was prepared by mixing aluminum nitrate and lactic acid in the molar ratio of 1:3. The fibers sintered at 1200 • C presented as an amorphous phase, with a rough surface and uniform diameter. Mullite and silica phases were obtained after the fibers were sintered at 1400 • C for 1 h, and the mullite whiskers were observed at the fibers surface, with a high aspect ratio of >10 (about 0.06 µm in diameter). The diameter of the whiskers reached about 0.5 µm at fibers surface when the fibers were sintered at 1600 • C for 1 h.

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“…As shown in Fig. 3(a), the band observed at 1420 cm −1 corresponds to Al-OH bonding mode [8]. The stretching modes of Al-O-Al linkages are observed at 620 and 816 cm −1 [9].…”

Section: Resultsmentioning

confidence: 83%

Synthesis and Characterization of Rich Silica Mullite Fibers by Sol–Gel Method Using Aluminum Lactate and Silica Sol

Tan¹,

Ding²,

Yang³

2011

Advanced Composite Materials

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“…3a, the band observed at 1400 cm 21 corresponds to the Al-OH bonding mode. 10 The stretching modes of Al-O-Al linkages are observed at 620 and 820 cm 21 . 11 When the alumina solution was condensed, condensation polycondensation could occur.…”

Section: Resultsmentioning

confidence: 97%

Mullite fibres prepared by sol–gel method using malic acid

Tan

2011

Advances in Applied Ceramics

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Long fibres of mullite were prepared by sol-gel method using aluminium nitrate, malic acid and tetraethylorthosilicate (TEOS). Thermogravimetry/differential scanning calorimetry (TG/DSC), Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses were used to characterise the properties of the gel and ceramic fibres. The gel fibres completely transformed to mullite fibres at 1200uC, with a uniform diameter and dense microstructure.

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“…The cellulosic materials were impregnated with aluminum chloride and sintered at 600–700 °C to produce alumina particles having micrometer size. In another study, alumina fibres were prepared by sol-gel process using aluminum-tri-isopropoxide as a precursor and hydroxyethyl cellulose as a template [16]. The gel containing HEC was spun by a syringe in ammonia solution to form fibers which were sintered at 1600 °C to obtain α-alumina fibers with diameter in the micrometer range.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization high purity alumina nanorods by a novel and simple method using nanocellulose aerogel template

Kenawy

Hassan

2019

Heliyon

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Highly porous nanofibrillated cellulose aerogel fibers (NFCA) prepared from bagasse pulp was used as a template for in situ preparation of alumina nanorods. NFCA was soaked in aluminum nitrate aqueous solution followed by soaking in ammonium hydroxide solution to generate aluminum hydroxide within the porous structure and at surface of NFCA. Sintering of NFCA/Al (OH) 3 was carried out at 1100 °C to produce nano-sized alumina with rod-like structure. The synthesized Al 2 O 3 nanorods were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and high resolution transmitted electron microscope (HR-TEM). The Al 2 O 3 rods had width from 123 to 86 nm while their length was in the micrometer range, as shown from SEM and HR-TEM images. The selected area X-ray diffraction (SEAD) showed rhombohedral crystal structure. XRD pattern confirmed formation of α-alumina. Energy dispersive X-ray spectroscopy (EDX) showed purity of the prepared Al 2 O 3 .

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Sol‐Gel Processing of Alumina‐Zirconia Fibers

Cited by 5 publications

References 28 publications

Synthesis and Characterization of Rich Silica Mullite Fibers by Sol–Gel Method Using Aluminum Lactate and Silica Sol

Synthesis and Characterization of Rich Silica Mullite Fibers by Sol–Gel Method Using Aluminum Lactate and Silica Sol

Mullite fibres prepared by sol–gel method using malic acid

Synthesis and characterization high purity alumina nanorods by a novel and simple method using nanocellulose aerogel template

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