Effect of copper addition on glass transition of silicate–phosphate glasses

Sułowska, Justyna; Wacławska, I.; Szumera, Magdalena

doi:10.1007/s10973-012-2328-0

Cited by 34 publications

(24 citation statements)

References 14 publications

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“…The introduction of alkaline elements forms discontinuities in the vitreous network and decreases the viscosity of a glass [81]. Moreover, alkaline oxides (e.g., Na 2 O) sharply reduce the glass transition temperature of a glass [82], whereas alkaline-earth oxides (e.g., CaO) have a lower impact on the glass transition temperature [83]. The principal intermediate elements in glass oxides are Al, Fe, Ti, Ni, and Zn [84,85].…”

Section: Chemical Compositionmentioning

confidence: 99%

Physical and biological characteristics of nanohydroxyapatite and bioactive glasses used for bone tissue engineering

Yousefi

Oudadesse

Akbarzadeh

et al. 2014

Nanotechnology Reviews

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Critical-sized bone defects have, in many cases, posed challenges to the current gold standard treatments. Bioactive glasses are reported to be able to stimulate more bone regeneration than other bioactive ceramics; however, the difficulty in producing porous scaffolds made of bioactive glasses has limited their extensive use in bone regeneration. On the other hand, calcium phosphate ceramics such as synthetic hydroxyapatite and tricalcium phosphate are widely used in the clinic, but they stimulate less bone regeneration. This paper gives an overview of the recent developments in the field of bioactive nanoparticles, with a focus on nanohydroxyapatite and bioactive glasses for bone repair and regeneration. First, a brief overview of the chemical structure and common methods used to produce synthetic nanohydroxyapatite and bioactive glasses has been presented. The main body of the paper covers the physical and biological properties of these biomaterials, as well as their composites with biodegradable polymers used in bone regeneration. A summary of existing challenges and some recommendations for future directions have been brought in the concluding section of this paper.

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Section: Chemical Compositionmentioning

confidence: 99%

Physical and biological characteristics of nanohydroxyapatite and bioactive glasses used for bone tissue engineering

Yousefi

Oudadesse

Akbarzadeh

et al. 2014

Nanotechnology Reviews

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“…It indicated that the introduction of CuO was assumed to convert the bridging oxygen bonds into nonbridging oxygen bonds in the lithium silicate glass network. Justyna Sułowska et al [20] reported the similar behavior in SiO 2 -P 2 O 5 -K 2 O-MgO-CaO-CuO glasses. Takebe et al [21] reported that the T g , CTE, and molar volume decreased with increasing CuO dopant concentration.…”

Section: Introductionmentioning

confidence: 73%

“…Justyna Sułowska et al presented that the T g decreased as the CuO concentration increased in SiO 2 -P 2 O 5 -K 2 O-MgO-CaO-CuO glasses. Because the more covalent character of Cu 2+ -O bonds replaced the more ionic bonds, such as Ca-O bonds and Mg-O bonds, this caused the glass structure to be more rigid, which resulted in the increasing amount of stress in the glass and thus, the T g decreased [20]. H. Takebe et al reported that the T g , CTE, and molar volume decreased with increasing CuO concentration in the CuO-BaO-B 2 O 3 -P 2 O 5 glass system [21].…”

Section: Introductionmentioning

confidence: 99%

The Tuning Capability of CuO and Na2CO3 Dopant on Physical Properties for Laser Sealing Using Fiber Types of Sealant

et al. 2020

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PbO-SiO2-Al2O3-B2O3 (PSAB)-based glasses were prepared in order to determine the feasibility for laser sealing in the form of fiber. To reach a high quality of laser sealing, the tuning capability of CuO and Na2CO3 dopant concentration was examined on thermal, thermo-mechanical, and optical properties of glasses. The difference of thermal expansion coefficient was reduced with codoping of 1 wt% CuO-2 wt% Na2CO3 into the PSAB glass system, and it amounted to 0.34 × 10−6/K. The codoped PSAB glass system reached 100% absorption at 810 nm, which corresponds to the wavelength of laser. The glass fiber with a diameter of 180 μm was successfully pulled from the codoped PSAB glass system. The fluorine-doped tin oxide (FTO) glass substrate using the glass fiber was successfully sealed. It presented a crack-free sealed surface with a sealing strength of about 41 MPa. These results indicate that the PSAB-based glass system in the form of fiber is proved as a laser sealing material in packaging systems.

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“…The ability to take the amorphous form also depends on the kind of introduced modifiers [16,17]. The works [18][19][20] show that it is possible to add up to 80 mol% of ZnO into the structure of the glasses from the system P 2 O 5 -ZnO.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of zinc addition effect on thermal properties of silicate and phosphate glasses

Sułowska

Wacławska

Szumera

2015

J Therm Anal Calorim

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The aim of the study was an analysis of two groups of glasses from the SiO 2 -P 2 O 5 -K 2 O-CaO-MgO system with various content of network formers in the form of P 2 O 5 and SiO 2 , modified by the addition of ZnO. Their effect on glass-forming ability, glass transition effect, crystallization process and the kind of crystallizing phases was examined using DSC and XRD methods. It was observed that in both matrixes, the addition of ZnO decreases the glass transition temperature (T g ). The lower T g values observed in the phosphate matrix glasses and the accompanying higher values of the changes in molar heat capacity (Dc p ) in contrast to the silicate matrix glasses may be considered an indicator of the degree of the reconstruction of their amorphous structure, which facilitates the process of their crystallization. It was found that the crystallizing products of the silicate matrix glasses were silicates and phosphates whose structure contained zinc. In the phosphate matrix glasses, it was observed that zinc inhibited the crystallization of silicate phases.

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Effect of copper addition on glass transition of silicate–phosphate glasses

Cited by 34 publications

References 14 publications

Physical and biological characteristics of nanohydroxyapatite and bioactive glasses used for bone tissue engineering

Physical and biological characteristics of nanohydroxyapatite and bioactive glasses used for bone tissue engineering

The Tuning Capability of CuO and Na2CO3 Dopant on Physical Properties for Laser Sealing Using Fiber Types of Sealant

Comparative study of zinc addition effect on thermal properties of silicate and phosphate glasses

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