fabrication of microporous corundum spinel refractorycastable

AlPO4-Modified Silicate Glasses as a Fertile Source for

Berlinite corundum spinel indialite and cordierite among others were the crystallizing phases when different glasses were heated for various times. Microporous materials made of some of these technically favorable minerals and characterized by an interesting morphologies were obtained through acid leaching of some of the glass-ceramics

Journal of Materials Engineering and Performance Volume

 · Fabrication of Microporous Corundum-Spinel Refractory Castables by Foam-Gelcasting Methods Authors (first second and last of 7) Huan Chen Feng Liang Lei Zhao Content type ReviewPaper Published 12 June 2015 Pages

A comparative study on the microstructures and mechanical

Abstract A new lightweight magnesia refractory for working linings of high-temperature furnaces was prepared by using microporous magnesia aggregates instead of conventional dense magnesia aggregates. The median pore size of the microporous magnesia aggregates was 2.97 μm while the apparent porosities of the microporous and dense aggregates were 33.3 and 5.5 respectively.

Optimization of Properties for Alumina-Spinel Refractory

 · Aiming at optimizing properties of alumina-spinel refractory castables coarse corundum particles were replaced partially with the particles of a novel porous multi-component CMA (CaO-MgO-Al 2 O 3) aggregate in the same size.Properties including the bulk density apparent porosity strength slag corrosion resistance thermal shock resistance and thermal fatigue resistance of alumina-spinel

Effect of microporous magnesia aggregates on

 · Furthermore Fu et al. fabricated alumina-magnesia castables with tabular corundum aggregates and microporous corundum aggregates demonstrating that lightweight alumina-magnesia castables exhibited an improved volume stability strength heat insulation and thermal shock resistance compared to common alumina–magnesia castables . Consequently the existing research strongly

High Purity Corundum Refractory Bricks real-time quotes

The upper hearth tuyere zone near the temperature at 1700 2000 Deg. C the use of sillimanite brick corundum and silicon carbide refractory filler Shi Mozhi. Bottom temperature at 1450 1500 Deg. C the use of graphite bricks and microporous carbon brick now also used corundum brick Gang Yumo brick and synthetic mullite brick.

Electroactive Nanoporous Metal Oxides and Chalcogenides

 · The archetypal silica- and aluminosilicate-based zeolite-type materials are renowned for wide-ranging applications in heterogeneous catalysis gas-separation and ion-exchange. Their compositional space can be expanded to include nanoporous metal chalcogenides exemplified by germanium and tin sulfides and selenides. By comparison with the properties of bulk metal

Mechanochemical Synthesis of Catalytic MaterialsAmrute

 · 1 Introduction. Catalytic processes are of key importance for the industrial manufacturing of valuable products from inexpensive raw materials (e.g. transportation fuels bulk and fine chemicals pharmaceuticals) and catalysts are the workhorses of these processes. 1 It is estimated that with a total sales price of catalytic materials of around 20 billion euro per year the catalysis-based

Review of RF patents for refractory inventions SpringerLink

 · A charge for the fabrication of refractory articles that includes mullite-containing material in the form of a mixture of smelted mullite and crushed mullite-corundum articles as well as alumina and in addition wastes from a molding compound of mullite-corundum composition with the following ratio between the components wt. smelted mullite in a fraction finer than 0.2 mm 2030

Template Synthesis and Photocatalytic Properties of Porous

 · Porous polymeric beads have been used as templates for the fabrication of porous metal oxide spheres. The beads were soaked in sols of titanium dioxide zirconium dioxide iron oxide aluminum oxide indium oxide tin oxide and cerium oxide. Successful infiltration and templating was obtained for titania zirconia tin oxide and ceria giving monodisperse nonaggregated spheres with a

AlPO4-Modified Silicate Glasses as a Fertile Source for

Berlinite corundum spinel indialite and cordierite among others were the crystallizing phases when different glasses were heated for various times. Microporous materials made of some of these technically favorable minerals and characterized by an interesting morphologies were obtained through acid leaching of some of the glass-ceramics

Fabrication of Microporous Corundum-Spinel Refractory

 · Microporous corundum-spinel castables with high strength and low thermal conductivity have been fabricated by foam-gelcasting methods.

AlPO4-Modified Silicate Glasses as a Fertile Source for

Berlinite corundum spinel indialite and cordierite among others were the crystallizing phases when different glasses were heated for various times. Microporous materials made of some of these technically favorable minerals and characterized by an interesting morphologies were obtained through acid leaching of some of the glass-ceramics

A comparative study on the microstructures and mechanical

Abstract A new lightweight magnesia refractory for working linings of high-temperature furnaces was prepared by using microporous magnesia aggregates instead of conventional dense magnesia aggregates. The median pore size of the microporous magnesia aggregates was 2.97 μm while the apparent porosities of the microporous and dense aggregates were 33.3 and 5.5 respectively.

Fabrication and characterization of lightweight

 · With the introduction of MgO micropowder which reacts with Al 2 O 3 to form a spinel both the corundum and spinel phases were observed in the microporous alumina. However despite the formation of a small amount of the spinel the main phase was corundum.

Template Synthesis and Photocatalytic Properties of Porous

 · Porous polymeric beads have been used as templates for the fabrication of porous metal oxide spheres. The beads were soaked in sols of titanium dioxide zirconium dioxide iron oxide aluminum oxide indium oxide tin oxide and cerium oxide. Successful infiltration and templating was obtained for titania zirconia tin oxide and ceria giving monodisperse nonaggregated spheres with a

Review of RF patents for refractory inventions SpringerLink

 · A charge for the fabrication of refractory articles that includes mullite-containing material in the form of a mixture of smelted mullite and crushed mullite-corundum articles as well as alumina and in addition wastes from a molding compound of mullite-corundum composition with the following ratio between the components wt. smelted mullite in a fraction finer than 0.2 mm 2030

High Purity Corundum Refractory Bricks real-time quotes

The upper hearth tuyere zone near the temperature at 1700 2000 Deg. C the use of sillimanite brick corundum and silicon carbide refractory filler Shi Mozhi. Bottom temperature at 1450 1500 Deg. C the use of graphite bricks and microporous carbon brick now also used corundum brick Gang Yumo brick and synthetic mullite brick.

Correlations among processing parameters and porosity of a

Abstract In this study lightweight alumina was fabricated using α-Al2O3 micropowder as the raw material and corn starch as a pore-forming agent. Orthogonal experiments were designed to investigate the effect of particle size pore-forming agent addition and sintering temperature on the density and porosity of the lightweight alumina. The experimental results were analysed using a one-way

Materials Free Full-Text Towards Macroporous α-Al2O3

This article combines a systematic literature review on the fabrication of macroporous α-Al2O3 with increased specific surface area with recent results from our group. Publications claiming the fabrication of α-Al2O3 with high specific surface areas (HSSA) are comprehensively assessed and critically reviewed. An account of all major routes towards HSSA alpha-Al2O3 is given including

Ceramics Refractories/Insulation Micro-Porous Castable

 · Spinel FormationA spinel mineral phase can be formed by the reaction of aluminum and magnesium in the presence of oxygen (O2) or of alumina (Al2O3) with periclase (MgO). It occurs naturally as MgAl2O4 (MgO-Al2O3). Certain alloys of aluminum such as 7075 contain magnesium. When these are exposed to free oxygen spinel can form.

Mechanochemical Synthesis of Catalytic MaterialsAmrute

 · 1 Introduction. Catalytic processes are of key importance for the industrial manufacturing of valuable products from inexpensive raw materials (e.g. transportation fuels bulk and fine chemicals pharmaceuticals) and catalysts are the workhorses of these processes. 1 It is estimated that with a total sales price of catalytic materials of around 20 billion euro per year the catalysis-based

Materials Free Full-Text Towards Macroporous α-Al2O3

This article combines a systematic literature review on the fabrication of macroporous α-Al2O3 with increased specific surface area with recent results from our group. Publications claiming the fabrication of α-Al2O3 with high specific surface areas (HSSA) are comprehensively assessed and critically reviewed. An account of all major routes towards HSSA alpha-Al2O3 is given including

 · Effect of microporous corundum aggregates on microstructure and mechanical properties of lightweight corundum refractories. Ceramics International 2019 45(7 part A) .(SCI ) 5 Wenying Zhou Wen Yan Nan Li Yuanbing Li Stefan

USAMethods for fabricating shapes by use of

This invention relates to the discovery of organometallic ceramic precursor binders used to fabricate shaped bodies by different techniques. Exemplary shape making techniques which utilize hardenable liquid organometallic ceramic precursor binders include the fabrication of negatives of parts to be made (e.g. sand molds and sand cores for metalcasting etc.) as well as utilizing ceramic

Journal of Materials Engineering and Performance Volume

 · Fabrication of Microporous Corundum-Spinel Refractory Castables by Foam-Gelcasting Methods Authors (first second and last of 7) Huan Chen Feng Liang Lei Zhao Content type ReviewPaper Published 12 June 2015 Pages

Optimization of Properties for Alumina-Spinel Refractory

 · Aiming at optimizing properties of alumina-spinel refractory castables coarse corundum particles were replaced partially with the particles of a novel porous multi-component CMA (CaO-MgO-Al 2 O 3) aggregate in the same size.Properties including the bulk density apparent porosity strength slag corrosion resistance thermal shock resistance and thermal fatigue resistance of alumina-spinel

Influence of Magnesium-Aluminum Spinel on the Directed

Influence of Magnesium-Aluminum Spinel on the Directed Oxidation of Molten Aluminum Alloys. Authors. Manfred Sindel Advanced Ceramics Group Technische Universität Hamburg-Harburg 2100 Hamburg 90 Federal Republic of Germany Search for more papers by this author

USAMethods for fabricating shapes by use of

This invention relates to the discovery of organometallic ceramic precursor binders used to fabricate shaped bodies by different techniques. Exemplary shape making techniques which utilize hardenable liquid organometallic ceramic precursor binders include the fabrication of negatives of parts to be made (e.g. sand molds and sand cores for metalcasting etc.) as well as utilizing ceramic

Fine-Scale Nanostructure in γ-Al2O3 Chemistry of Materials

 · We have applied a local structural technique atomic pair distribution function (PDF) analysis of powder diffraction data to γ-Al2O3 to obtain a quantitative structure. Refinements of the PDF support previous findings that nonspinel model representations are more suitable to describe the average structure of γ-Al2O3 as opposed to the spinel model. Surprisingly also we find a previously