Sintering and crystallization of plates prepared from coarse glass ceramic frits

Piva, Jorge Henrique; Wanderlind, Augusto; Just, Jeanini; Montedo, Oscar Rubem Klegues; Noni, Agenor De

doi:10.1016/j.ceramint.2013.05.011

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…In the specimens 15 and 29 belonging to alumina matt region, it could be seen that Anorthite crystalline phase was grown to form a rough surface state composed of many pores and a structure of 3D form. [5][6] Hardness of the glaze as a function of glaze composition was analyzed and summarized in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Glaze Development with Application of Unity Molecular Formula

No¹,

Kim²,

Kim³

et al. 2016

J. Korean Ceram. Soc

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Effects of compositions and sintering conditions on glaze properties are shown in the diagram constructed by using the unity molecular formula (UMF) method in this study. Glossy characteristics of glaze were clearly differentiated by compositional area in the diagram and sintering process. As alumina and silica contents were increased, texture of the glaze became rough and opaque, akin to having been devitrified or underfired. The correlation between glossiness and surface roughness was found to be non-linear and inversely proportionate. Crystalline phases formed in the glaze were also influenced by the compositional area. Due to the high concentration of CaO, anorthite and wollastonite were formed depending on the compositions. Hardness was increased with an increase of alumina and silica concentrations in the glaze.

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Section: Resultsmentioning

confidence: 99%

Glaze Development with Application of Unity Molecular Formula

No¹,

Kim²,

Kim³

et al. 2016

J. Korean Ceram. Soc

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show abstract

“…9,10 Indeed, concerning their chemical and structural features, the glass-based materials can include into their structure a wide range of nutrients, such as silicon (Si), phosphorus (P), magnesium (Mg), calcium (Ca), potassium (K), iron (Fe) and other metals, which coexist together in an oxide glass structure. [11][12][13] It is known that the glass solubility in water is low but it can be enhanced by changing both the chemical composition and the granularity of the final product, to such an extent that the glassy network could act as a carrier of nutrient elements over time in relation to the conditions of the soils (pH, humidity, temperature) in which the glass is dispersed.…”

Section: Introductionmentioning

confidence: 99%

“…Among the SRFs, 8 several glass‐based materials have been successfully investigated as environmentally‐friendly fertilizers 9,10 . Indeed, concerning their chemical and structural features, the glass‐based materials can include into their structure a wide range of nutrients, such as silicon (Si), phosphorus (P), magnesium (Mg), calcium (Ca), potassium (K), iron (Fe) and other metals, which coexist together in an oxide glass structure 11‐13 …”

Section: Introductionmentioning

confidence: 99%

Agronomic potential of two different glass‐based materials as novel inorganic slow‐release iron fertilizers

et al. 2021

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BACKGROUND: Large amounts of chemical fertilizers are still currently used to compensate the soil nutrients scarcity in order to increase and sustain crop yield with consequent rising of environmental pollution and health problems. To mitigate these environmental risks, fertilizers with slow-release behaviours have been developed. The aim of this study was to assess the agronomic potential of two different glass-based materials (by-products from the ceramic sector) as inorganic slow-release iron (Fe) fertilizers.RESULTS: The X-ray powder diffraction confirmed the presence of amorphous structure and the richness in Fe of the investigated materials. The solubility analysis highlighted the slow Fe release from the glassy network and that the maximum of the Fe release was at alkaline pH suggesting their potential use as slow-release Fe fertilizers, especially in calcareous soils. The pot and leaching experiments demonstrated that although the glass-based materials increased the amount of soil available Fe, we did not observe Fe leaching and plant toxicity. This fact would suggest their reliability to increase soil fertility without negative effects on the environment. CONCLUSION: The use of glass-based materials, specifically by-products from the ceramic sectors, as inorganic slow-release Fe fertilizers can be sustained. The tests performed at three different pH conditions testified the slow-release behaviour of the tested materials and underlined that the Fe release increases at alkaline environment. Therefore, the present study pointed out the glass-based materials by products from the ceramic sector as novel slow-release and environmental-friendly fertilizers in agriculture.

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“…6,17 The concurrence of crystallization and sintering has been studied for various glass systems, and the influence of surface or volume crystallization on the densification of glass powder have been studied. 24,24,25 However, the proposed models require several glass properties as input information. Thus, the models' accuracy and validity range are always debatable and the sintering models must be continuously improved.…”

Section: Introductionmentioning

confidence: 99%

“…Figure1shows the shrinkage of pellets produced from SLS (15 Na 2 O-10 CaO-75 SiO 2 ) and NC 2 S 3(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33) CaO-50 SiO 2 ) glass powder as a function of temperature between 200°C and 650°C upon heating at a rate of 10°C.min −1 . The samples exhibit an initial shrinkage, ca.…”

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confidence: 99%