On the dual role of ZnO in zinc-borate glasses

Colak, S. Cetinkaya; Akyüz, I.; Atay, Ferhunde

doi:10.1016/j.jnoncrysol.2015.10.040

Cited by 121 publications

(15 citation statements)

References 35 publications

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“…Centikaya Colak et al (2016) have investigated Zinc-borate glasses and reported that ZnO plays a dual role as a modifier and a network former. If ZnO behaves as a modifier, the number of NBOs will increase, and this will cause the expansion of the glass network (7) .…”

Section: Introductionmentioning

confidence: 99%

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Husenkhan¹,

Sankarappa²,

Malge³

2021

IJST

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Objectives: Investigation of electrical transport properties of glass system in the composition (P 2 O 5 ) 0.65−x (B 2 O 3 ) 0.1 (ZnO) 0.25 (Li 2 O) x where x=0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40 and establish the conduction mechanisms. Methods: Glasses were synthesized using the standard melt quenching technique at 1473K. The samples were confirmed to be amorphous through XRD studies. An independent measurement of dc conductivity was carried out for temperature range 300-620K, by following two probe method. Findings: Conductivity of the present glasses is found to be of the order of 10 -3 (Ω m) -1 which is higher than the reported values for lithium-ion solid-state electrolytes. Conductivity variation with temperature obeyed Mott's Small Polaron Hopping at high temperatures and Variable Range Hopping at low temperatures. SPH model fits to the conductivity gave activation energies in the range 58-409 meV. VRH model fits gave density of states at Fermi level of the order of 10 23 eV -1 m -3 . The nano-crystallite phases identified and determined size found to be in the range 5-37 nm and considered to be a glass-nanocomposites. Novelty/Applications: For the first time, zinc-lithium-borophosphate glasses are investigated for conduction mechanisms. Activation energy and density of states at the Fermi level are determined. At high temperature Mott's SPH model and at low temperature Mott's VRH model are found to be suitable to explain conductivity of these glasses.

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Section: Introductionmentioning

confidence: 99%

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Husenkhan¹,

Sankarappa²,

Malge³

2021

IJST

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“…Table 2 shows the absorption transmission bands of the vibration attributed to the structural groups. FT‐IR bands located at approximately 547, 1216, and 1376 cm −1 were caused by the Zn–O stretching vibrations in [ZnO 4 ], 23 B–O stretching vibrations of (BO 3 ) 3− units, and B–O stretching vibrations of trigonal [BO 3 ], 23,24 respectively. Bands at 684–694 cm −1 were attributed to B–O–B bending vibrations of trigonal [BO 3 ] 22,25 .…”

Section: Resultsmentioning

confidence: 99%

Effect of properties and crystallization behavior of BaO–ZnO–B₂O₃–SiO₂ glass on the electrical conductivity of Cu paste

Chen

Jiang

et al. 2022

J Am Ceram Soc.

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The extensive application of multilayer ceramic capacitors provides an attractive development for terminal electrode pastes. However, the growing requirement for advanced glass materials used in terminal electrode pastes is substantiated. Therefore, to advance the development of electrode pastes, better development and deeper exploration of glass powder are required. Here, a series of BaO-ZnO-B 2 O 3 -SiO 2 (BZBS) glasses were prepared by melt-quenching technique, which are used to investigate the effect of the introduction of BaO on structure and properties of the ZnO-B 2 O 3 -SiO 2 (ZBS) glass. With the introduction of BaO, the relative amount of [BO 4 ] was much less, which made the glass network structure loosen, decreased the glass transition temperature (T g ) and increased the coefficient of thermal expansion of the glass. The decreasing contact angle was observed on the surface of a barium titanate (BaTiO 3 ) substrate. When the BaO content was around 3-7 mol%, the stability of ZBS glass frit could be strengthened by inhibiting the precipitation of Zn 2 SiO 4 crystal. In addition, to further characterize the effect of glass on terminal electrode paste, BZBS glass powder was adopted to prepare copper electrode paste, which was printed on the BaTiO 3 substrate and subsequently fired at 800 • C for 10 min. With the related copper paste containing ZBS glass doped with 7 mol% BaO, the optimum value of acid resistance and sheet resistance (1.99 mΩ) were exhibited, at which the coated copper paste formed a dense conducting layer.

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“…This increment indeed leads to the enhancement of the radiation shielding performance. Upon the mass attenuation coefficient, Half-Value-Layer (HVL) and Mean-Free-Path (MFP) values of the synthesized samples can be calculated according to the following equations [30]…”

Section: Fig 5 Mass Attenuation Coefficients For All Glassesmentioning

confidence: 99%

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

Abbas

Baki

Leng

et al. 2021

ARFMTS

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In this study, borosilicate host (H) and seven (S1-S7) samples are prepared by traditional melt-quenching technique. The samples are singly (S1, S2) and doubly (S3-S7) doped with deferent contents of Tb3+ and Dy3+ ions. All samples are analyzed and characterized by XRD (x-ray diffraction), ATR-FTIR (Attenuated total Reflectance-Fourier transform infrared) spectroscopy, TGA/DSC (Thermogravimetric analysis/Differential scanning calorimetry), and Raman spectroscopy. Moreover, the radiation shielding parameters of mentioned glasses such as mass attenuation (?/?), mean free path (MFP), and half-value layer (HVL) are evaluated within the energy of 0.015MeV-15MeV. These parameters are theoretically investigated and evaluated by using XCOM, WINXCOM, and Phy-X programs in addition to the other relevant equations. The ATR-FTIR measurement and Raman spectroscopy results confirmed the unit structure of BO3 and BO4 groups as the main compound as well as the Aluminum-oxide (Al-O-Al) and zinc-oxide (ZnO4) bonds. The transition (Tg), onset crystallization (Tx), crystallization (Tc) temperatures, and weight loss were identified from DSC and TGA findings, respectively. Also, the prepared glass shows good stability against crystallization, as reflected by (?T) variation. Furthermore, the radiation shielding parameter findings show good enhancement of the performance of the samples. However, upon these findings, one can say that these glasses could be used and utilized for radiation shielding purposes.

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On the dual role of ZnO in zinc-borate glasses

Cited by 121 publications

References 35 publications

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Effect of properties and crystallization behavior of BaO–ZnO–B₂O₃–SiO₂ glass on the electrical conductivity of Cu paste

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

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On the dual role of ZnO in zinc-borate glasses

Cited by 121 publications

References 35 publications

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Effect of properties and crystallization behavior of BaO–ZnO–B2O3–SiO2 glass on the electrical conductivity of Cu paste

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

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Effect of properties and crystallization behavior of BaO–ZnO–B₂O₃–SiO₂ glass on the electrical conductivity of Cu paste