<i>Glass Science</i>

Doremus, Robert H.; Sigel, George H.

doi:10.1063/1.2808752

Cited by 69 publications

(74 citation statements)

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“…The nucleation temperature at 740°C and crystallization temperature at 910°C for the parent glass (BZnO) was reduced to 654°C and 746°C, respectively, after 15.53 mol % substitution of ZnO into the system. This result can be attributed to the decrease in viscosity of the system with the increase of ZnO as reported by Doremus [14] and Alizadeh et al [15], Kamitakahara et al [11], Mirhadi et al [16] and Srivastar and Pyare [7].…”

Section: In Vitro Bioactivity Analysissupporting

confidence: 51%

In vitro evaluation of bioactivity of SiO2-CaO-P2O5-Na2O-CaF2-ZnO glass-ceramics

Riaz

Zia

Saleemi

et al. 2014

Materials Science-Poland

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Zinc is an essential trace element that stimulates bone formation but it is also known as an inhibitor of apatite crystal growth. In this work addition of ZnO to SiO 2 -CaO-P 2 O 5 -Na 2 O-CaF 2 glass-ceramic system was made by conventional meltquenching technique. DSC curves showed that the addition of ZnO moved the endothermic and exothermic peaks to lower temperatures. X-ray diffraction analysis did not reveal any additional phase caused by ZnO addition and showed the presence of wollastonite and hydroxyapatite crystalline phases only in all the glass-ceramic samples. As bio-implant apatite forming ability is an essential condition, the surface reactivity of the prepared glass-ceramic specimens was studied in vitro in Kokubo's simulated body fluid (SBF) [1] with ion concentration nearly equal to human blood plasma for 30 days at 37°C under static condition. Atomic absorption spectroscopy (AAS) was used to study the changes in element concentrations in soaking solutions and XRD, FT-IR and SEM were used to elucidate surface properties of prepared glass-ceramics, which confirmed the formation of HCAp on the surface of all glass-ceramics. It was found that the addition of ZnO had a positive effect on bioactivity of glassceramics and made it a potential candidate for restoration of damaged bones.

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Section: In Vitro Bioactivity Analysissupporting

confidence: 51%

In vitro evaluation of bioactivity of SiO2-CaO-P2O5-Na2O-CaF2-ZnO glass-ceramics

Riaz

Zia

Saleemi

et al. 2014

Materials Science-Poland

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“…If the electric field pulls the sodium ions toward the tin oxide, then sodium can accumulate near the interface between the tin oxide and the glass. If moisture ingression occurs, then the water may attack the sodium-rich glass near the interface and weaken the interfacial bonding (as sodium-rich glasses are soluble in water 6 ). Sodium will react with water to form sodium hydroxide and hydrogen, and highly alkaline solutions (pH > 9) such as sodium hydroxide will dissolve silicate glasses rapidly at elevated temperatures (5100 C).…”

Section: Discussionmentioning

confidence: 99%

“…Sodium will react with water to form sodium hydroxide and hydrogen, and highly alkaline solutions (pH > 9) such as sodium hydroxide will dissolve silicate glasses rapidly at elevated temperatures (5100 C). 6 In addition, the generation of hydrogen near the interface may lead to a weakening of inter facial bonds due to the reduction of the tin oxide. 7 The relative durability of the zinc oxide films may be partially due to the fact that atomic hydrogen will not reduce zinc oxide.…”

Section: Discussionmentioning

confidence: 99%

Corrosion effects in thin‐film photovoltaic modules

Carlson¹,

Romero²,

Willing³

et al. 2003

Progress in Photovoltaics

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Electrochemical corrosion effects can occur in thin-film photovoltaic (PV) modules that are fabricated on tin-oxide-coated glass when operating at high voltages and at elevated temperatures in a humid climate. The current study shows that this corrosion is associated with a delamination of the tin oxide layer from the glass, which is caused by sodium accumulation near the interface between the tin oxide and the glass and by the ingression of moisture into the PV module from the edges. This corrosion in thin-film PV modules can be significantly reduced by altering the growth conditions of the tin oxide or by using zinc oxide as a transparent conductive oxide electrode.

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“…[11][12][13][14][15] These processes can occur simultaneously, although, depending on environmental conditions (such as pH and temperature) as well as chemical durability of glass, one or other of the processes can be predominant. 8,[14][15][16][17] On the other hand it has been suggested that depending on durability of glasses, different types of hydrated surface layers can be formed 18 and that the structure of hydrated layer will be different for durable and non-durable glass. 2,15 The effect of hydration on the surfaces of silicate glasses has been traditionally assessed by measuring alkali/hydrogen concentration profiles in the glass surface.…”

Section: Introductionmentioning

confidence: 99%

Surface hydration and nanoindentation of silicate glasses

Tadjiev

Hand

2010

Journal of Non-Crystalline Solids

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The near-surface mechanical properties of glasses and differences in mechanical behaviour between high and low durability silicate glasses are investigated. Nanoindentation is used to examine the effect of hydration on the nearsurface mechanical properties of silicate glasses with varying degrees of chemical durability. It is shown that hydration has little if any effect on high durability glasses even at long immersion times, whereas in low durable glasses hydration reduces the near-surface mechanical properties significantly and the thickness of hydrated layer may exceed the indentation depth. In addition an attempt is made to measure the thickness and mechanical properties of hydrated layer in low durability glasses where influence of the substrate is negligible. : 61.43.Fs; 81.05.Kf PACSs

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Glass Science

Cited by 69 publications

References 0 publications

In vitro evaluation of bioactivity of SiO2-CaO-P2O5-Na2O-CaF2-ZnO glass-ceramics

In vitro evaluation of bioactivity of SiO2-CaO-P2O5-Na2O-CaF2-ZnO glass-ceramics

Corrosion effects in thin‐film photovoltaic modules

Surface hydration and nanoindentation of silicate glasses

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