Advanced Refractory Products and Materials Developed at the A. S. Berezhnoi Ukrainian Research Institute for Refractories Joint-Stock Co.

Primachenko, V. V.; Martynenko, V. V.

doi:10.1023/b:refr.0000029610.45549.d4

Cited by 2 publications

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“…It could be seen from Figure that the compressive strength at room temperature changed linearly with the increased of bulk density. The specific strength at room temperature in this study was much higher than those from reference . Meanwhile, the specific strength of F16S35 at 800°C and 1000°C was greater than the value at room temperature.…”

Section: Resultscontrasting

confidence: 70%

“…The room‐temperature thermal conductivity (Figure ) was 0.085 W·(m·K) −1 much lower compared with those in other researches . This might be explained by the thermal conduction mechanism in porous ceramics.…”

Section: Resultsmentioning

confidence: 60%

“…But the specific strength of samples we prepared was much higher, which was shown in Figure . Compared with the materials (0.20 W·(m·K) −1 at 650°C, 3.5 MPa compressive strength and 0.8 g/cm 3 density) reported in reference, sample F16S35 showed a similar thermal conductivity and higher specific strength (density 0.32 g/cm 3 and compressive strength 1.38 MPa). It could be seen from Figure that the compressive strength at room temperature changed linearly with the increased of bulk density.…”

Section: Resultsmentioning

confidence: 67%

“…It has demonstrated that porous ceramics are very promising materials for this usage due to their low density, low thermal conductivity, and high specific strength . Especially, anorthite has attracted much attentions for using as thermal insulators because of its' low theoretical density (about 2.76 g/cm 3 ), low thermal conductivity (about 3.67 W·(m·K) −1 ), low thermal expansion coefficient (4.8 × 10 −6 /K), and high melting point (1553°C) . In past years, many researches focused on the preparation and strengthening of porous anorthite ceramics .…”

Section: Introductionmentioning

confidence: 99%

“…Priogov et al reported an anorthite insulating refractory with the thermal conductivity at 400°C of 0.13‐0.15 W·(m·K) −1 , density of 0.3‐0.45 g/cm 3 , and compressive strength of 1.0‐1.8 MPa fabricated by direct foaming process. Primachenko et al prepared a microporous anorthite‐based lightweight refractory with a density of 0.7‐1.0 g/cm 3 , and reported the thermal conductivity was between 0.19 and 0.25 W·(m·K) −1 at 650°C. Ni et al fabricated an anorthite refractory brick with thermal conductivity at 800°C of 0.17 W·(m·K) −1 , density of 0.47 g/cm 3 , and compressive strength of 1.15 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characteristics of porous anorthite ceramics with high porosity and high‐temperature strength

et al. 2019

Int J Applied Ceramic Tech

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High-temperature properties including compressive strength, thermal shock behavior, and thermal conductivity of porous anorthite ceramics with high specific strength were tested and analyzed. The results showed that the prepared materials merit hightemperature compressive strength, thermal stability, and conductivity. With the appropriate fabrication parameters, even though containing 0.33 g/cm 3 bulk density and 88.2% porosity, its compressive strength could reach 2.03 MPa at 1000°C, 147% of that at room temperature; the residual strength ratio kept as 114.7% after a thermal shock at 1200°C. The X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) showed that anorthite grains refinement and intergranular voids filling by liquid phase were main factors for the high strength. From room temperature to 1200°C, its thermal conductivity only varied from 0.085 to 0.258 W·(m·K) −1 . High porosity, a large number of nanoregions in anorthite grains and amorphous phase in grain boundary were main reasons for low thermal conductivity. K E Y W O R D S anorthite, porous materials, strength, thermal conductivity How to cite this article: Wu L, Li C, Li H, et al. Preparation and characteristics of porous anorthite ceramics with high porosity and high-temperature strength. Int J Appl Ceram Technol. 2020;17:963-973.

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Section: Resultscontrasting

confidence: 70%

Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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