Glass-forming compositions and physicochemical properties of degradable phosphate and silver-doped phosphate glasses in the P2O5–CaO–Na2O–Ag2O system

Ahmed, Ahmed A.; Ali, Aidy; El‐Fiqi, Ahmed

doi:10.1016/j.jmrt.2018.07.012

Cited by 24 publications

(16 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This replacement induces not only a decrease of crosslinking between phosphate chains, but also the creation of more non-bridging oxygen than bridging oxygen in the glass network. This behaviour is due to the divalent cations Mg 2+ and Ca 2+ , which can crosslink two different chains in the vitreous network more than the monovalent cation K + , which principally depolamyrized the phosphate chains by forming new non-bridging oxygens [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Innovative Formulations of Phosphate Glasses as Controlled-Release Fertilizers to Improve Tomato Crop Growth, Yield and Fruit Quality

et al. 2021

View full text Add to dashboard Cite

Three phosphate glass compositions, VF1, VF2, and VF3, containing macro and micronutrients with different [K2O/(CaO+MgO)] ratio, were formulated to be used as controlled release fertilizers for tomato crop, depending on their chemical durability in water and their propriety with respect to the standards of controlled-release fertilizers. This study investigated the influence of [K2O/(CaO+MgO)] ratio variation on glass properties. For this, the elaborated glasses have undergone a chemical characterization using inductively coupled plasma atomic emission spectroscopy, a thermal characterization using differential thermal analysis, a physicochemical characterization based on density and molar volume measurements, and a structural characterization using Raman spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. In addition, the chemical durability was determined by measuring the percentage of weight loss and the pH. Results revealed that the glass structure and composition have the mean role in controlling the release of nutrients in water. By increasing [K2O/(CaO+MgO)] ratio, the dissolution rates of the glasses increased due to the shrinking in the rate of crosslinking between phosphate chains, accompanied with a diminution in transition and crystallization temperatures, and an increase in the molar volume. An agronomic valorization of VF1 and VF2 glass fertilizers, which showed dissolution profiles adequate to the criteria of controlled-release fertilizers, was carried out to evaluate their efficiency on tomato crops. These glass fertilizers improved soil mineral content and tomato performances in comparison to the control and NPK treatments with the distinction of VF2. The results highlight the effectiveness of these smart fertilizers toward their potential large-scale application to improve crop production and quality for high nutritional value foods.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The density (ρ) and the molar weight (M) were used to calculate the molar volume (V M ) using the following equation [ 34 ]: V M = M/ρ.…”

Section: Methodsmentioning

confidence: 99%

Innovative Formulations of Phosphate Glasses as Controlled-Release Fertilizers to Improve Tomato Crop Growth, Yield and Fruit Quality

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The calculated molar volumes are shown in Figure 4 . Molar volume, which compares volumes occupied by one mole of glass, is more sensitive to glass structure changes than density as it normalizes for atomic masses of glass components [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…The molar volume (V M ) was determined from the density value and molecular glass weight of the batch composition using the equation: V M = ρ glass /M glass with M glass as the glass’s molar mass [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Elaboration and Characterization of Vitreous Fertilizers and Study of Their Impact on the Growth, Photosynthesis, and Yield of Wheat (Triticum durum L.)

et al. 2021

View full text Add to dashboard Cite

Four different phosphate glass formulations (F0, F1, F2, and F3) were developed according o wheat nutrient requirements to be used as controlled-release fertilizers. These glasses contain macro-elements (P2O5-K2O-CaO-MgO), with the addition of microelements (Fe-Mn-Zn-B-Cu-Mo) in each formulation. The effects of these elements’ addition on thermal properties, glass structure, and dissolution behaviors were investigated. Results showed that these glasses are composed essentially of metaphosphate chains and that the addition of micronutrients could change the chemical durability of phosphate glasses. A greenhouse experiment was performed using wheat (Triticum durum L.) to evaluate the efficiency of the four glasses, with or without application of chemical nitrogen (N) (N + VF and VF, respectively). The different formulas were tested using two rates of 0.3 and 1 g per plant. In addition to the vitreous fertilizer formulations, two other treatments were applied: control treatment with no amendment and Nitrogen-Phosphorus-Potassium treatment with the application of the conventional fertilizers on the base of optimal rates. After four months of cultivation, vitreous fertilizers application significantly improved growth (7% to 88%), photosynthetic (8% to 49%) parameters, and yield (29% to 33%) compared to NPK treatment and to the control. It has been found that formulas F1, F2, and F3 may constitute a potential alternative to conventional fertilization due to their positive impact on wheat production and can be used in practice as an environmentally controlled-release fertilizer.

show abstract

“…The obtained density and total atomic mass (M) of the glasses were applied to calculate the molar volume (V a ) of the glass samples with Eq. (2) [25,26].…”

Section: Density and Molar Volume Studiesmentioning

confidence: 99%

Study of bagasse and cassava rhizome effects on the physical, mechanical and structural properties of soda-lime borate glasses

Sopapan

Laopaiboon

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

The glass prepared from sustainable raw materials yields interesting properties, besides the low cost and environmentally friendly. Two series of glass compositions based on B 2 O 3-P 2 O 5-Na 2 O-CaO added with bagasse (BG) and cassava rhizome (CR) were fabricated by melt-quenching technique, and their physical, mechanical and structural properties were studied. The physical properties such as density and molar volume were calculated and discussed. The elastic moduli, Poisson's ratio, Debye temperature, acoustical impedance and microhardness have been estimated based on pressure-controlled ultrasonic technique at 4 MHz frequency with normal and angle probes. It was found that the addition of bagasse and cassava rhizome leads to an increase of elastic constants, Debye temperature and microhardness of the prepared glass. Vickers hardness tester was also applied to determine microhardness of the glass using an applied load of 0.98 N. The values of microhardness obtained from both techniques were compared and a good correlation was observed. Moreover, the internal structural units of the glass samples have been estimated by FTIR. XRD spectroscopy was applied to confirm the amorphous nature in the glasses.

show abstract

Glass-forming compositions and physicochemical properties of degradable phosphate and silver-doped phosphate glasses in the P2O5–CaO–Na2O–Ag2O system

Cited by 24 publications

References 55 publications

Innovative Formulations of Phosphate Glasses as Controlled-Release Fertilizers to Improve Tomato Crop Growth, Yield and Fruit Quality

Innovative Formulations of Phosphate Glasses as Controlled-Release Fertilizers to Improve Tomato Crop Growth, Yield and Fruit Quality

Elaboration and Characterization of Vitreous Fertilizers and Study of Their Impact on the Growth, Photosynthesis, and Yield of Wheat (Triticum durum L.)

Study of bagasse and cassava rhizome effects on the physical, mechanical and structural properties of soda-lime borate glasses

Contact Info

Product

Resources

About