Preparation of lightweight corundum-mullite thermal insulation materials by microwave sintering

Si, Yaochen; Fan, Shuheng; Wang, Hailong; Xia, Miao; Li, Lingfeng; Liu, Guoqi; Li, Hongxia; Zhang, Rui; Fan, Bingbing; Chen, Yongqiang

doi:10.2298/pac2102170s

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…Overall, spray coating using an airbrush gun is a versatile and efficient method for applying coatings, offering control, precision, and versatility in a wide range of applications. https://doi.org/10.56294/sctconf2024838 5 Majeed EA, et al…”

Section: Spray Coating (Airbrush Gun)mentioning

confidence: 99%

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Enhance the properties of the stainless steel Solar basin by using new ceramic coatings

Majeed,

Rashid,

Abdul Had

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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Solar energy is increasingly being used as a renewable energy source in water analysis, energy devices, treatment systems, data logging, and analytical instruments, providing sustainable and cost-effective solutions. A 316 stainless steel sink was utilized with the aim of enhancing its thermal insulation properties. Ceramic materials such as mullite(3Al2o3.2sio2), titanium dioxide(Tio2) , and magnesium oxide(mgo ) are identified as effective insulating agents for improving the insulation processes of a stainless steel 316 basin.Mullite powder is added in weight ratios of 0.7%, 2.21%, 3.79%, and 3.78%. Titanium dioxide is also added in weight ratios of 0.3%, 0.79%, 1.39%, and 0.7%. To enhance the insulation ratio, add 0.6% magnesium oxide to S5. .The coating process involves air-brush painting on the stainless steel sheet to ensure a uniform and durable application. Various tests, including X-ray diffraction(XRD), scanning electron microscopy(SEM),Atomic force microscope (AFM), thermal conductivity measurement, adhesion strength testing, density measurement, coating thickness analysis, evaluation of UV radiation resistance, and porosity determination, are conducted to evaluate the performance and characteristics of the coatings. Thermal insulation was achieved for sample S4, resulting in a thermal conductivity value of 0.231411 W/m•°C, along with an associated increase in pore percentage of 0.88%. Additionally, sample S4 exhibited a lower density value of 1.22 kg/m³, attributed to the incorporation of oxide. In comparison, sample S5, composed of magnesium, exhibited the highest thickness among the remaining samples, measuring (540μm). The project's objective is to create a sustainable and enhanced method for water desalination by leveraging renewable energy sources and advanced insulation techniques incorporating ceramic coatings. This innovative approach aims to decrease energy consumption and minimize environmental repercussions, thereby facilitating the provision of safe drinking water, particularly in regions grappling with water scarcity. Additionally, the project seeks to enhance the properties of a stainless steel 316 basin by reducing thermal conductivity, ultimately increasing the insulation percentage. This endeavor involves harnessing solar energy as a means of achieving these goals.

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Section: Spray Coating (Airbrush Gun)mentioning

confidence: 99%

“…(4) Solar power and wind power are currently the primary renewable energy sources being considered. (5) Mullite has a thermal conductivity of 3,3 W/m•K and a coefficient of thermal expansion of 5,3x10⁻⁶ K⁻¹. (6,7) Titanium oxide (TiO2) has a thermal conductivity of 3,3 W/m•K and a thermal expansion value of 9,4x10⁻⁶ K⁻¹.…”

Section: Introductionmentioning

confidence: 99%

Enhance the properties of the stainless steel Solar basin by using new ceramic coatings

Majeed,

Rashid,

Abdul Had

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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Microwave‐sintered mullite structural ceramics based on low‐grade bauxite applied for fracturing proppants

Li,

Xiong,

Yang

et al. 2024

Energy Science & Engineering

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This study aimed to assess the feasibility of manufacturing fracturing proppants by microwave sintering and using low‐grade bauxite as raw material. The effects of microwave hotspot SiC and sintering additive MnO2 content on the performance of the mullite‐based structural materials were studied, respectively. The optimum sintering condition was determined by single‐factor experiments. The sintering process and mechanism were explored based on the analysis of physicochemical properties, phase transitions, and microstructure. The results showed that (1) mullite ceramic composites could be successfully prepared only with SiC added and with poor interparticle bonding microstructure. (2) With the addition of MnO2 and CaO, the granular‐shaped mullite crystals transformed into rod‐like mullite crystals, forming a net structure. (3) As the input power increased, the overfast sintering rate would reduce proppants' mechanical properties, and it was also necessary to select a reasonable sintering time to avoid overburning. (4) When the mass ratio of MnO2:CaO:SiC:bauxite was 2:1.5:12:84.5 and under the sintering condition of 1000 W, 2 h, the performance (breakage ratio of 8.5% under 28 MPa closed pressure, apparent density of 2.58 g/cm3, turbidity of 52 FTU, and acid solubility of 6.77%) could meet the requirements of the Chinese Petroleum and Gas Industry Standard (SY/T 5108–2014). This study provides a powerful way for reducing the fracturing cost, which not only improves the low‐grade bauxite utilization scale within the ceramic industry, but also expands the application of microwave sintering technology in mullite structural materials for the petroleum and gas industry.

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High-strength microporous corundum-mullite refractory aggregates with sub-micron pores using vacuum impregnation treatment

Chen

Yan

Schafföner

et al. 2022

Journal of Materials Research and Technology

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Preparation of lightweight corundum-mullite thermal insulation materials by microwave sintering

Cited by 6 publications

References 35 publications

Enhance the properties of the stainless steel Solar basin by using new ceramic coatings

Enhance the properties of the stainless steel Solar basin by using new ceramic coatings

Microwave‐sintered mullite structural ceramics based on low‐grade bauxite applied for fracturing proppants

High-strength microporous corundum-mullite refractory aggregates with sub-micron pores using vacuum impregnation treatment

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