High Temperature Ceramic Materials

Zhang, Shaowei

doi:10.3390/ma14082031

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…The above result of erosion resistance was better than that in the literature. According to the following equation, 30,31 the erosion depth of copper slag in refractory is directly related to the viscosity, wettability, surface tension of slag, and pore size of refractory:

\begin{equation}L={{\left( {r\cos \theta }/{2}\; \right)}^{{1}/{2}\;}}{{\left( {t\gamma }/{\eta }\; \right)}^{{1}/{2}\;}}\end{equation}

where L is the penetration depth, γ is the surface tension of copper slag, η is the viscosity of copper slag, θ is the wetting angle, r is the pore radius, and t is the contact time.…”

Section: Resultsmentioning

confidence: 99%

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Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Jin,

Ding,

Zhang

et al. 2024

J Am Ceram Soc.

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The penetration of copper‐smelting slag into refractories is a major challenge to the research of chromium‐free refractories for copper‐smelting furnace. In this paper, Y2O3 was added to regulate the pore structure of periclase refractories, which enhanced their various properties, especially corrosion resistance to copper converter slag. The results showed that the periclase refractories doped with 1.0 wt.% Y2O3 (1Y sample) possessed the optimum properties. Compared to the sample without Y2O3, the apparent porosity of 1Y sample was decreased by 7.3%, and its average pore diameter was only 3.7 μm. The addition of Y2O3 filled the pores among MgO grains and promoted the expansion of high melting point silicates, thereby reducing the pore size and causing more complex pore structures. This was beneficial to improving the corrosion resistance of periclase to copper slag, especially to prevent the penetration of Cux+ and Na+. After static slag corrosion, the permeability index was significantly decreased by 41% compared to periclase refractories without Y2O3. Moreover, compared to industrial MgO–Cr2O3 refractories, the 1Y sample possessed better resistance to copper slag erosion based on rotating finger tests, and its permeability index and penetration depth decreased by almost 50%.

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\begin{equation}L={{\left( {r\cos \theta }/{2}\; \right)}^{{1}/{2}\;}}{{\left( {t\gamma }/{\eta }\; \right)}^{{1}/{2}\;}}\end{equation}

where L is the penetration depth, γ is the surface tension of copper slag, η is the viscosity of copper slag, θ is the wetting angle, r is the pore radius, and t is the contact time.…”

Section: Resultsmentioning

confidence: 99%

Section: Resistance To Copper Slag Corrosionmentioning

confidence: 99%

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Jin,

Ding,

Zhang

et al. 2024

J Am Ceram Soc.

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“…In [7][8][9], it is noted that ceramics based on Al 2 O 3 , which do not contain modifying additives (modifiers), are characterized by a low level of physical and technical properties, difficult to control structure, low density and high sintering temperature. The main task of using such ceramics is to reduce its sintering temperature to the level of 1250-1300 °C.…”

Section: у д о с к о н а л е н н я в л а с т и в о с т е й т о в а р і вmentioning

confidence: 99%

“…Summarizing the work on sintering ceramics based on pure oxide and oxygen-free compounds with additives, all modifiers by the nature of their interaction with Al 2 O 3 are divided into 4 groups [8]:…”

Section: у д о с к о н а л е н н я в л а с т и в о с т е й т о в а р і вmentioning

confidence: 99%

Compositeceramics for Special Purpose

Olena¹

2021

COMMODITIES AND MARKETS

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As a result of the research carried out, the search for the optimal compositions of composite ceramics was carried out by the method of planning the experiment using the FFD25-1 as an experiment plan. The influence of modified additives of eutectic compositions on the physical and technical properties of composite ceramics for special purposes, with a low sintering temperature, used for the manufacture of grinding bodies, has been determined.

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“…Considering this, "self-toughening" was regarded as the only feasible way to enhance the fracture toughness of TaB 2 -based materials [8]. Thus, their powder counterparts, consisting of highly crystalline anisotropy-shaped TaB 2 particles, were perceived to be desirable for preparation of high-performance TaB 2 -based materials [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature, Efficient Synthesis of Highly Crystalline Urchin-like Tantalum Diboride Nanoflowers

Liu

et al. 2022

Materials

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Urchin-like tantalum diboride (TaB2) nanoflowers were successfully synthesized via a high-efficiency and energy-saving methodology named molten-salt and microwave comodified boro/carbothermal reduction, using low-cost B4C as a reducing agent. By taking advantage of the synergistic effects of the molten-salt medium and microwave heating conditions, the onset formation temperature of TaB2 was drastically reduced to below 1000 °C, and phase-pure powders of TaB2 nanoflowers were obtained at temperatures as low as 1200 °C within only 20 min. Notably, the present temperature conditions were remarkably milder than those (>1500 °C for several hours) required by conventional reduction methods, which use the strong, but expensive, reducing agent, elemental boron. The resulting urchin-like TaB2 nanoflowers were verified to consist of numerous nanowires with a single-crystalline nature, uniform rod-like morphology, long lengths of up to 4.16 μm, and high aspect ratios of >10. This result indicated that the as-synthesized urchin-like TaB2 nanoflowers possessed high specific surface area and anisotropic morphology, which were favorable not only for sintering, but also for toughening their bulk counterparts.

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High Temperature Ceramic Materials

Cited by 5 publications

References 15 publications

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Compositeceramics for Special Purpose

Low-Temperature, Efficient Synthesis of Highly Crystalline Urchin-like Tantalum Diboride Nanoflowers

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High Temperature Ceramic Materials

Cited by 5 publications

References 15 publications

Regulating the pore structure of periclase refractories by adding Y2O3 to enhance corrosion resistance for copper slag

Regulating the pore structure of periclase refractories by adding Y2O3 to enhance corrosion resistance for copper slag

Compositeceramics for Special Purpose

Low-Temperature, Efficient Synthesis of Highly Crystalline Urchin-like Tantalum Diboride Nanoflowers

Contact Info

Product

Resources

About

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag