silicate glass
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2022 ◽  
Vol 124 ◽  
pp. 111981
Author(s):  
Fangzheng Qi ◽  
Xia Shao ◽  
Yu Ma ◽  
Yuanyuan Sun ◽  
Jiawu Zhu ◽  
...  

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 577
Author(s):  
Stefan Karlsson

TiO2 is an important oxide for property modifications in the conventional soda lime silicate glass family. It offers interesting optical and mechanical properties, for instance, by substituting heavy metals such as lead in consumer glasses. The compositional effects on the hardness, reduced elastic modulus and crack resistance as determined by indentation of chemically strengthened (CS) TiO2-doped soda lime silicate glass was studied in the current paper. The CS, which was performed by a K+ for Na+ ion exchange in a molten KNO3 salt bath at 450 °C for 15 h, yielded significant changes in the indentation mechanical properties. The hardness of the glass samples increased, and this was notably dependent on the SiO2, CaO and TiO2 content. The reduced elastic modulus was less affected by the CS but showed decrease for most samples. The crack resistance, an important property in many applications where glasses are subjected to contact damage, showed very different behaviors among the series. Only one of the series did significantly improve the crack resistance where low CaO content, high TiO2 content, high molar volume and increased elastic deformation favored an increased crack resistance.


Silicon ◽  
2022 ◽  
Author(s):  
E. A. Abdel Wahab ◽  
Ateyyah M. Al-Baradi ◽  
M. A. Sayed ◽  
Atif Mossad Ali ◽  
Sayed A. Makhlouf ◽  
...  

Author(s):  
Linfeng Ding ◽  
Yanan Xu ◽  
Rui Yang ◽  
Yongjian Yang ◽  
Ranran Lu ◽  
...  
Keyword(s):  

Author(s):  
Julia Lubauer ◽  
Renan Belli ◽  
Herwig Peterlik ◽  
Katrin Hurle ◽  
Ulrich Lohbauer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Omar Benzine ◽  
Zhiwen Pan ◽  
Courtney Calahoo ◽  
Michal Bockowski ◽  
Morten M. Smedskjaer ◽  
...  

AbstractWe report the effect of structural compaction on the statistics of elastic disorder in a silicate glass, using heterogeneous elasticity theory with the coherent potential approximation (HET-CPA) and a log-normal distribution of the spatial fluctuations of the shear modulus. The object of our study, a soda lime magnesia silicate glass, is compacted by hot-compression up to 2 GPa (corresponding to a permanent densification of ~ 5%). Using THz vibrational spectroscopic data and bulk mechanical properties as inputs, HET-CPA evaluates the degree of disorder in terms of the length-scale of elastic fluctuations and the non-affine part of the shear modulus. Permanent densification decreases the extent of non-affine elasticity, resulting in a more homogeneous distribution of strain energy, while also decreasing the correlation length of elastic heterogeneity. Complementary 29Si magic angle spinning NMR spectroscopic data provide a short-range rationale for the effect of compression on glass structure in terms of a narrowing of the Si–O–Si bond-angle and the Si–Si distance.


2021 ◽  
pp. 117478
Author(s):  
Kamalesh Damodaran ◽  
Jean-Marc Delaye ◽  
Andrey G. Kalinichev ◽  
Stephane Gin

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1481
Author(s):  
Wenbo Li ◽  
Chenghao Xu ◽  
Ameng Xie ◽  
Ken Chen ◽  
Yingfei Yang ◽  
...  

Interfacial reaction between quartz and potassium silicate glass was studied at both 900 °C and 1000 °C. The results showed that no phase transformation was observed for the pure quartz at 900 °C or 1000 °C. Instead, for quartz particles in K2O-SiO2 glass, the transformation from quartz to cristobalite occurred at the quartz/glass interface at first, and then the cristobalite crystals transformed into tridymite. The tridymite formed at the interface between particles and glass became the site of heterogeneous nucleation, which induces plenty of tridymite precipitation in potassium silicate glass. The influential mechanism of firing temperature and size of quartz particles on transformation rate was discussed.


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