A modified milling system, using a bimodal distribution of highly resistant ceramics. Part 1. A natural hydroxyapatite study

Harabi, Abdelhamid; Harabi, Esma

doi:10.1016/j.msec.2015.03.003

Cited by 21 publications

(11 citation statements)

References 57 publications

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“…In this work, the long-term goal is the development of a low cost anorthite from inexpensive raw materials, such as kaolin and calcite (CaCO 3 ) using a modified milling system. Many works have already been published for appreciating these native raw materials including bioceramics [9][10][11][12][13][14][15][16][17], advanced ceramics [18][19][20][21][22][23][24][25][26][27] and ceramic membranes [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Most of these publications are closely related to this work and clearly highlight their possible applications.…”

Section: Cerâmicas De Boa Qualidade Têm Alto Custo O Que Limita O Sementioning

confidence: 99%

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

et al. 2017

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Anorthite is widely spread in nature and belongs to the plagioclase group of rock forming minerals. Plagioclases represent a continuous series of solid solutions between anorthite (CaO.Al 2 O 3 .2SiO 2 ) and albite (Na 2 O.Al 2 O 3 .6SiO 2 ) and form an enormous group of triclinic minerals. harabi52@gmail.com, Zaiou_21@yahoo.fr, guechia@yahoo.fr, semouni84@gmail.com, kanour17@yahoo.fr, foughali_lazhar@yahoo.fr, zouaisouheila@yahoo.fr, mezahif@yahoo.fr, guerfatiha@gmail.com Mineralogically, anorthite is reported as a chemically weak mineral, resulting in a basic reaction when dissolved into boiling water, while strong acidic and basic solutions dissolve it. Glass-ceramics and ceramics with crystalline anorthite are mainly used in electrical, thermo-mechanical and water resistance applications [1][2][3][4]. Anorthite is an important technical ceramic material that has good physical properties, such as very low thermal expansion coefficient, low dielectric constant and loss, good thermal shock resistance, and high creep resistance at high AbstractGood quality ceramics costs a lot that has limited their use in developing countries. This work was devoted to prepare low-cost and good quality anorthite based ceramics. The proposed composition was 80 wt% kaolin (DD2 type) and 20 wt% calcium oxide (CaO). The choice of these raw materials was dictated by their natural abundance coupled with a modified milling system, as another interesting advantage. Previous studies have shown that a simple vibratory multidirectional milling system using bimodal distribution of highly resistant ceramic milling elements has been successfully applied for obtaining fine powders. The influence of the relatively lower sintering temperature, ranging from 800 to 1100 °C, on the porosity and the average pore size (APS) have been investigated. The APS and the porosity values of samples sintered at 950 °C were about 1 μm and 4%, respectively. The best Vickers microhardness and 3-point bending strength values for these sintered samples, using this proposed milling system, were 7.1 GPa and 203 MPa, respectively. Finally, the crystalline phase evolution during heat treatment was investigated by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy techniques.

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Section: Cerâmicas De Boa Qualidade Têm Alto Custo O Que Limita O Sementioning

confidence: 99%

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

et al. 2017

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“…Algeria is one of the countries in the world that have abundantly available raw materials, such as calcium carbonates (CaCO 3 )(CC), dolomite (CaCO 3 ·MgCO 3 ), bones (natural derived hydroxyapatite (HA): Ca 10 (PO 4 ) 6 (OH) 2 ), kaolin, feldspar and quartz. Many works have already been published for valorizing these native raw materials, for the production of advanced ceramics [1][2][3][4][5][6][7], ceramic membranes [8][9][10][11][12][13][14][15][16][17][18][19] and bioceramics [20][21][22][23][24][25][26][27]. In particular, in the membrane field the possibility of replacing the more expensive starting materials by cheaper raw materials to be used as a support (which constitutes about 99% of the filter mass) is significantly important from economic and energetic points of view.…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

Ghouil

Harabi

Bouzerara

et al. 2015

Materials Characterization

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The preparation and characterization of porous tubular ceramic composite microfiltration membranes, using kaolins and calcium carbonates, were reported. The porous gehlenite (2CaO·Al 2 O 3 ·SiO 2 ) and anorthite (CaO·Al 2 O 3 ·2SiO 2 ) based ceramics were obtained by a solid state reaction. A ceramic support, sintered at 1250°C, within an average pore size of about 8 μm, a porosity of about 47% and a compression strength around 40 MPa, was prepared. The microfiltration active top layer was added on the support by a slip casting from clay powder suspensions. The novel microfiltration membrane layer has a thickness of 40 μm and an APS value of about 0.2 μm. This average pore size value was improved and considerably lower than those reported in the literature (0.5 μm). The performance of the novel microfiltration ceramic membrane was determined for evaluating both the water permeability and rejection. This proved the potentiality of the membrane produced in the microfiltration field. Moreover, the good adhesion, between the support and the active microfiltration layer membranes, was also proved. A correlation between microstructures of used powders and physicochemical properties was discussed. Finally, the origin of the unique two powder order membrane depositions was also proposed.

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“…Spectra did not include any peaks that were assignable to agarose [20,21], which indicated that agarose did not penetrate through to the reaction layer. In addition, carbonate bands at 1482, 1457, and 874 cm −1 were also detected, suggesting the HA crystallites that precipitated in the organic matrix were comparable in composition to minerals found in natural bone [22,23]. EDS results (Fig.…”

Section: Compositional Analysismentioning

confidence: 66%

Biomineralization-inspired synthesis of chitosan/hydroxyapatite biocomposites based on a novel bilayer rate-controlling model

Ran

Chen

et al. 2015

Colloids and Surfaces B: Biointerfaces

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A modified milling system, using a bimodal distribution of highly resistant ceramics. Part 1. A natural hydroxyapatite study

Cited by 21 publications

References 57 publications

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

Biomineralization-inspired synthesis of chitosan/hydroxyapatite biocomposites based on a novel bilayer rate-controlling model

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