A novel and green preparation of porous forsterite ceramics with excellent thermal isolation properties

Fang, Zhao; Zhang, Lixin; Ren, Zhen; Jin, Gao; Chen, Xiaoyu; Liu, Xinhong; Tao, Ge

doi:10.1016/j.ceramint.2018.09.296

Cited by 30 publications

(13 citation statements)

References 32 publications

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“…The mixtures were then mixed with water to gain the optimal viscosity of plastic paste for the plastic moulding of the test samples. Approximate dimensions of the test samples were (20 × 25 × 100) mm 3 . Pyrometric cones for the refractoriness test were also prepared from the same plastic paste according to the official standard EN 993-13:1995.…”

Section: Experimental Partmentioning

confidence: 99%

“…1 Forsterite is used in the industry as the lining of the sintering zone of rotary kilns and metallurgical furnaces. [2][3] Another significant attribute of forsterite ceramics is a high coefficient of linear thermal expan-sion, which is similar to the coefficients of metals. For this reason, forsterite is used in electrical engineering for joining ceramics with metals.…”

Section: Introductionmentioning

confidence: 99%

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Formation and influence of magnesium-alumina spinel on the properties of refractory forsterite-spinel ceramics

Nguyen¹,

Sokolar²

2020

Mater. Tehnol.

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Forsterite refractory ceramic is mostly used in the cement industry as the lining of a rotary kiln and as the lining of metallurgical furnaces due to its high refractoriness of up to 1850°C. Another significant property of forsterite is its coefficient of linear thermal expansion used in the electrotechnical industry for ceramic-metal joints. An addition of aluminium oxide to a raw-material mixture results in the creation of a magnesium-alumina spinel (MgO•Al2O3), which improves the sintering and mechanical properties of forsterite ceramics. An inexpensive source of aluminium oxide is fly ash. The utilization of fly ash, a secondary energy product of coal-burning power plants, is important for the environment and sustainable development. This paper evaluates the transformation of mullite (3Al2O3•2SiO2) from fly ash into a magnesium-alumina spinel, its influence during the synthesis and the resulting properties of a fired forsterite refractory ceramic body. Forsterite-spinel ceramics were synthesized from olivine, calcined magnesite and 0-20 % of fly-ash powders. XRD analyses were used to determine the mineralogical composition, thermal analyses were used to determine the formation of spinel and its behaviour during the firing, and scanning electron microscopy (SEM) was used to determine the morphology of crystal phases. The refractoriness of pyrometric cones, refractoriness under load, thermal-shock resistance, water absorption, porosity and mechanical properties of the fired test samples were also determined. The transformation of mullite resulted in small amounts of magnesium-alumina spinel in the forsterite ceramics. Test results showed that the presence of magnesium-alumina spinel improved the sintering, microstructure, thermal-shock resistance and mechanical properties in comparison with pure-forsterite refractory ceramics.

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Section: Experimental Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formation and influence of magnesium-alumina spinel on the properties of refractory forsterite-spinel ceramics

Nguyen¹,

Sokolar²

2020

Mater. Tehnol.

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“…Linear thermal expansion (αL in °C -1 ) was determined by the following relationship: A thermal expansion by volume (αV) can be deduced for an isotropic material from the following relationship [30]:…”

Section: Technological Testsmentioning

confidence: 99%

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

Manni

Harrati

Haddar

et al. 2020

Preprint

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Lizardite rich peridotite has never been used to prepare ceramic specimens, especially in Morocco. For this raison, potential use of naturally abundant lazirditic material from the Rif domain (NW morocco), as a supply for ceramic industry, has been evaluated. The effects of lizardite addition to magnesite and dolomite mixtures on the thermomechanical properties of the calcined ceramics were also detailed. To achieve this target, natural lizardite, magnesite and dolomite samples were collected in ultrabasic Beni Bousra massif. Those raw samples were used for the synthesis of a forsterite-monticellite rich ceramics. Both raw and sintered samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and fourier transform infrared (FTIR). Main physical and mechanical properties were assessed and correlated to their respective microstructural changes. The obtained results showed that both magnesite and dolomite were mainly composed of MgCO3 and CaCO3. In contrast, lizardite sample showed high amounts of silica, magnesia and iron oxide. Technological tests indicated that the prepared mixtures had increased flexural strengths. An increased amount of lizardite in the initial mixtures enhanced mechanical properties of the prepared ceramic specimens. The same data showed that lizardite has led to a decrease in linear shrinkage during calcination and subsequently, the production of ceramics with the required technological properties. Thus, the preparation of lizardite-based ceramics from the raw material deposits of the Rif area, Morocco, is technically feasible, economically justifiable and socially desirable due to the contribution to the economic growth of the raw materials sector, especially ceramic industry.

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“…Žárovzdorná forsteritová keramika je důležitým typem materiálu, chemický vzorec forsteritu je 2MgO•SiO2 a forsterit se využívá především v metalurgickém a cementářském průmyslu jako vyzdívka metalurgických a rotačních pecí díky vysoké teplotě tání forsteritu až 1890 °C [1,2,3]. Forsterit je také využíván v elektrotechnickém průmyslu pro spojení keramiky s kovem, a to díky poměrně vysokému koeficientu délkové teplotní roztažnosti, který je podobný koeficientu kovů [4,5].…”

Section: úVodunclassified

Žárovzdorné Vlastnosti a Korozní Odolnost Forsterit-Spinelové Keramiky S Využitím Vysokoteplotního Popílku

Nguyen

Sokolar

2021

CzeJCivEng

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Tento článek se zabývá procesem syntézy žárovzdorné forsterit-spinelové keramiky za použití vysokoteplotního popílku a reaktivního oxidu hlinitého jako zdroje oxidu hlinitého. Vstupní suroviny byly rozemlety, smíchány v různém poměru a vypáleny při 1500 °C po dobu 2 h. Vypálené zkušební vzorky byly charakterizovány pomocí RTG difrakční analýzy a rastrovacího elektronového mikroskopu. Rovněž byla zkoumána pórovitost, nasákavost, objemová hmotnost, žárovzdornost, únosnost v žáru, odolnost proti změnám teplot a korozní odolnost vůči účinkům taveniny železa. Výsledné vlastnosti byly poté porovnány v závislosti na zdroji oxidu hlinitého. Přítomnost spinelu ve vzorcích vedla ke zlepšení mikrostruktury, mechanických vlastností, odolnosti proti změnám teplot a také korozní odolnosti. Zejména směsi s 10–20 % spinelu měly nejslibnější výsledky.

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A novel and green preparation of porous forsterite ceramics with excellent thermal isolation properties

Cited by 30 publications

References 32 publications

Formation and influence of magnesium-alumina spinel on the properties of refractory forsterite-spinel ceramics

Formation and influence of magnesium-alumina spinel on the properties of refractory forsterite-spinel ceramics

WITHDRAWN: Effects of Lizardite Addition on Technological Properties of Forsterite-Monticellite Rich White Ceramics Prepared From Natural Magnesite and Dolomite

Žárovzdorné Vlastnosti a Korozní Odolnost Forsterit-Spinelové Keramiky S Využitím Vysokoteplotního Popílku

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