Synthesis, characterization and standard molar enthalpies of formation of two zinc borates: 2ZnO·2B2O3·3H2O and ZnB4O7

Liang, Pan; Li, Sa-Ying

doi:10.1016/j.jct.2019.07.010

Cited by 10 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the DTA/TG curves of sample 4 (Figure 7) in the range of 25-215 • C, there are low-temperature endothermic effects at 121 • C, 142 • C, and 163 • C with a total weight loss of 18.2 wt%, which correspond to the decomposition of B(OH) 3 residues in sample 4. The endothermic effect in the range of 890-984 • C with a maximum at 960 • C corresponds to the melting point of zinc borate [12]. Thus, the obtained IR spectroscopy data confirms that sample 3 contains bands characteristic of both boric acid and zinc borate.…”

Section: Synthesis Of Finely Dispersed Zinc Borate Nanopowder (Stage 2)supporting

confidence: 68%

“…) and anhydrous (ZnO•B 2 O 3 , 4ZnO•3B 2 O 3 , etc.) zinc borates are known [12], and are of technological interest as additives to polymer compositions due to their ability to slow down and suppress the processes of smoke formation [14][15][16][17]. In the production of paints with high anti-corrosion performance, a joint additive of zinc borate and phosphate bases is used [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…At present, an increase in interest in the development of methods for the preparation of borate powders with particles of a given size is noted [11,12,15,27]. Thus, during the hydrothermal treatment of nanosized powder CaO and aqueous H 3 BO 3 at 180 • C for 12 h, submicron priceite (Ca 2 (B 5 O 7 )(OH) 5 •H 2 O) was synthesized, which has an average particle size of 0.25 µm [27].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

et al. 2022

View full text Add to dashboard Cite

Zinc borates are widely used in industry due to their thermal stability as a flame retardant in the production of plastics, rubber, and other polymer compositions. We have developed a simple and effective approach for the synthesis of zinc borate powders with desired properties, including desired particle size, low bulk density, high reactivity, etc. Zinc borates were prepared by the thermal treatment of a concentrated water–carbohydrate solution of a zinc salt until finely dispersed ZnO was formed, followed by its hydrothermal treatment at 90–300 °C as part of a suspension based on a hot aqueous solution of H3BO3. According to X-ray powder diffraction, IR spectroscopy, and TG–DSC data, depending on the temperature of hydrothermal treatment, a decrease in the water content in the structure of synthesized zinc borate particles is observed. TEM and SEM data indicate the formation of isometrically shaped zinc borate particles in the nanometer range during hydrothermal treatment above 250 °C. Varying the temperature of the hydrothermal treatment affects the average size and fineness of the structure of the zinc borate particles.

show abstract

Section: Synthesis Of Finely Dispersed Zinc Borate Nanopowder (Stage 2)supporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Zinc borates are also commonly used as host lattices for photo-and thermoluminescent material phosphors as a result of their high thermal and chemical stability, convenient synthesis, and low cost. Furthermore, zinc borates can have applications in tribology and medicine [5]. Due to their use in different industries, a plethora of studies have been performed, showing that zinc borate crystallization affected by various physicochemical parameters [6][7][8] such as pH, temperature, supersaturation, operating conditions, and the presence of surface-modifying reagents [9][10][11][12].…”

Section: Zinc Can Form Several Hydrated Borates Includingmentioning

confidence: 99%

Box–Behnken Experimental Design for Zinc Borate Zn2B6O11•7H2O

Polat¹,

Sayan²

2020

Journal of Boron

View full text Add to dashboard Cite

The present study investigated the effect of the operating conditions on the crystallization of zinc borate. For zinc borate crystallization, sodium tetraborate decahydrate and zinc sulfate heptahydrate were used as reactants. In the first part of the study, the crystals were characterized by X-ray diffraction spectroscopy (XRD), Fourier-transform infrared spectroscopy (FTIR), light microscopy, and particle size and thermogravimetric analysis. The results show that the obtained crystals were in the form of Zn 2 B 6 O 11 •7H 2 O, and the operating conditions had a significant effect on the size, morphology, and filtration characteristics of the zinc borate crystals. In the second part of the study, Box-Behnken design (BBD) with response surface methodology (RSM) was employed to determine the optimal operating conditions for zinc borate crystallization. The effects of stirring rate, temperature, and reactant feed rate on the average particle size were investigated. The results show that the data sufficiently fit the second-order polynomial model. The crystallization conditions, including stirring rate, temperature, and reactant feed rate, were studied at 400-500 rpm, 45-85 ºC, and 300-900 mL/h, respectively. The minimum particle size (3.3 µm) was obtained at a stirring rate of 450 rpm, a temperature of 85 ºC, and a reactant feed rate of 300 mL/h.

show abstract

“…Hydrothermal synthesis can be defined as a chemical process that takes place when a series of reagents are mixed, suspended or dissolved, preferably in water, and heated by means of high-pressure autoclaves. Currently, hydrothermal methods are widely used for the synthesis of simple oxides and compound oxides, hybridization of organic and inorganic particles, silicates, phosphates, borates, and carbonates, among other types of particles. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Fast Heating and Cooling in the Hydrothermal Synthesis on LiFePO₄ Microparticles

Ruiz-Jorge

Benítez

Fernández-García

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Hydrothermal synthesis is a chemical process that has gained much interest in recent years, especially for the synthesis of LiFePO4 since it is a method that requires a relatively low temperature, short reaction time, and it is reproducible. In this work, LiFePO4 microparticles have been synthesized by means of a fast heating system (sand bath) under hydrothermal conditions. The experiments have been carried out under two different heating rates (86 °C/min and 5.26 °C/min), two different residence times (5 and 30 min), and two different cooling rates (−455 °C/min and −8 °C/min). The effects that these three parameters had on the synthesized particles were verified using several techniques such as X-ray diffraction and scanning electron microscopy. It was observed that the heating rate had a great influence on the purity, crystallization, and morphology of the synthesized LiFePO4 particles. In addition, the high influence of cooling rate on the crystallization and morphology of the particles was also analyzed.

show abstract

Synthesis, characterization and standard molar enthalpies of formation of two zinc borates: 2ZnO·2B2O3·3H2O and ZnB4O7

Cited by 10 publications

References 38 publications

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

Box–Behnken Experimental Design for Zinc Borate Zn2B6O11•7H2O

Effect of Fast Heating and Cooling in the Hydrothermal Synthesis on LiFePO₄ Microparticles

Contact Info

Product

Resources

About

Synthesis, characterization and standard molar enthalpies of formation of two zinc borates: 2ZnO·2B2O3·3H2O and ZnB4O7

Cited by 10 publications

References 38 publications

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

A New Approach for the Synthesis of Powder Zinc Oxide and Zinc Borates with Desired Properties

Box–Behnken Experimental Design for Zinc Borate Zn2B6O11•7H2O

Effect of Fast Heating and Cooling in the Hydrothermal Synthesis on LiFePO4 Microparticles

Contact Info

Product

Resources

About

Effect of Fast Heating and Cooling in the Hydrothermal Synthesis on LiFePO₄ Microparticles