Synthesis of ι‐Al₂O₃ from a Mixture of Aluminum Nitrate and Carboxymethyl Cellulose

Abstract

A simple preparation method for the synthesis of ι‐Al2O3 with a mixture of aluminum nitrate and carboxymethyl cellulose is proposed. Structural characterization of the microwave‐heated samples was performed by X‐ray diffraction and the results showed the development of ι‐Al2O3 phase at a temperature of 498°C. No α‐Al2O3 peaks were observed until the highest temperature reached 1189°C; at this temperature ι‐Al2O3 peaks were still strong. In order to elucidate the morphology of the powders, scanning electron microscopy was used and showed the elongated plate‐like morphology of synthesized ι‐Al2O3.

Effect of mechanical activation and microwave heating on synthesis and sintering of nano-structured mullite

“…In another work [18], the stoichiometric mullite was prepared using attrition milling by the decomposition of kyanite (Al 2 SiO 5 ) and its reaction with ␣-alumina. The complete mullite formation occurred Microwave energy has been extensively used for synthesis and sintering of ceramic materials [19][20][21]. The most important reasons of using microwave energy over conventional processing are fast and volumetric heating, high heating rates, limited grain growth and forming more uniform grain sizes throughout the ceramic body.…”

Preparation and characterization of bioceramic nanocomposites based on hydroxyapatite (HA) and carboxymethyl cellulose (CMC)

“…19,20 Recently, it has been used for mineralizing important inorganic particle; alumina. 21 Owing to its biodegradability, biocompatibility, nontoxicity, muco-adhesive nature, very recently, the development of biocomposite materials has been explored by mineralizing HA in presence of CMC 22 and by incorporating HA nanoparticles into CMC/chitosan system. 23,24 In similar direction, considering the above-mentioned aspects, we expect that CMC can interact with precursors and direct the nucleation and growth of hydroxyapatite to produce bioactive ceramics.…”

Interface behavior of Al2O3/Ti joints produced by liquid state bonding

“…Alumina (Al 2 O 3 ) is an important material used in a wide range of applications, including refractories, structural materials, electronic packaging, catalysts, and sensors. Alumina precursors, depending on the starting materials, processing route, presence of impurities, and heating conditions, undergo a variety of transitions until the most stable structure (α-Al 2 O 3 ) is formed at high temperature (Bahlawane and Watanabe, 2000;Ebadzadehw and Sharifi, 2008). Alumina has many useful properties such as high electrical resistivity, high temperature strength and chemical inertness.…”