Surface roughness and morphology evolution of optical glass with micro-cracks during chemical etching

Xiao, Huifang; Wang, Hairong; Fu, Gang; Chen, Zhi

doi:10.1364/ao.56.000702

Cited by 16 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, regarding the IrO 2 /Ti-30 electrode (Figures 3C,D), the coated IrO 2 layer was flat and had minute visible cracks. This observation demonstrates the effect of chemical etching, and also indicates that an increase in etching time results in the removal of surface micro-cracks (Xiao et al, 2017). When the etching time was ≥40 min, the formation of IrO 2 agglomerates around the surface roughness as a result of over-etching was observed (Figures 3E,F).…”

Section: Resultsmentioning

confidence: 56%

Electrodeposition of High-Surface-Area IrO2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction

et al. 2020

View full text Add to dashboard Cite

Under acidic conditions, IrO 2 exhibits high catalytic activity with respect to the oxygen evolution reaction (OER). However, the practical application of Ir-based catalysts is significantly limited owing to their high cost in addition to the scarcity of the metal. Therefore, it is necessary to improve the efficiency of the utilization of such catalysts. In this study, IrO 2-coated Ti felt (IrO 2 /Ti) electrodes were prepared as high-efficiency catalysts for the OER under acidic conditions. By controlling the surface roughness of the Ti substrate via wet etching, the optimum Ti substrate surface area for application in the IrO 2 /Ti electrode was determined. Additionally, the IrO 2 film that was electrodeposited on the 30 min etched Ti felt had a large surface area and a uniform morphology. Furthermore, there were no micro-cracks and the electrode obtained (IrO 2 /Ti-30) exhibited superior catalytic performance with respect to the OER, with a mass activity of 362.3 A g −1 Ir at a potential of 2.0 V (vs. RHE) despite the low Ir loading (0.2 mg cm −2). Therefore, this proposed strategy for the development of IrO 2 /Ti electrodes with substrate surface control via wet etching has potential for application in the improvement of the efficiency of catalyst utilization with respect to the OER.

show abstract

Section: Resultsmentioning

confidence: 56%

Electrodeposition of High-Surface-Area IrO2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Figure 5(d) shows that the LIEFs for one rear-surface crack are sorted from big to small: g = 2:3, g = 2:2, g = 2:4, g = 2:1, g = 2:5, g = 2:6. Our previous study has shown that with the increase of etching time, the crack width increases while the crack depth remains unchanged, which would lead to a decrease of aspect ratio 16 . Therefore, for one crack with a large aspect ratio, which usually occurs in the actual crack, the LIEF would increase at first and then decrease as chemical etching progresses.…”

Section: Effect Mechanism Of Crack and Rpmentioning

confidence: 97%

Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching

Xiao

Chen

Wang

et al. 2018

Pacific-Rim Laser Damage 2018: Optical Materials for High-Power Lasers

Self Cite

View full text Add to dashboard Cite

Chemical etching is usually utilized to improve the laser damage performance of optical glass by mitigating microcracks, while it inevitably produces some reaction products (RPs). In this paper, two K9 glasses with good quality and two K9 glasses with micro-cracks are etched, statically or dynamically (high-frequency ultrasonic agitation). The morphologies of cracks and RPs are characterized, and the laser-induced damage thresholds (LIDTs) are measured. The results show that with the increase of etching time, the LIDT increases slightly at first and then decreases gradually for the glass with RPs, and the LIDT increases at first and then stabilizes for the glass without RPs. Using finite-difference time-domain method, the light intensities around crack, RP and their combination are simulated, respectively. The results indicate that the light intensity enhancement factor (LIEF) increases at first and then decreases with the decrease of crack aspect ratio, and the LIEF increases with RP radius. The LIEF for the combination is generally larger than that for one crack or one RP, which greatly depends on the relative distance between the crack and the RP. Experimental and simulated results complement each other, revealing the influence mechanism of crack and RP on the LIDT. This work would contribute to improving the LIDT of optical glass by chemical etching.

show abstract

“…There are various defects on the glass surface and inside of the bulk glass when glass is formed, and the fine polishing process could cause micro-cracks and other defects on the glass surface also [43][44][45]. Therefore, the actual strength of the glass is several orders of magnitude lower than the theoretical strength, and the strength of the glass after grinding and polishing will be reduced to some extent [46][47][48].…”

Section: Mechanical Properties Of Glassmentioning

confidence: 99%

Impact of Chemical Corrosion on Mechanical Properties of Boroaluminosilicate Pharmaceutical Glasses

Ma,

Liu,

Zhang

et al. 2024

Materials

View full text Add to dashboard Cite

Boroaluminosilicate (BAS) glasses have excellent chemical durability and mechanical properties and are widely used in the pharmaceutical packaging industry. The corrosion behavior of boroaluminosilicate (BAS) glasses have been investigated for many years; however, the impact of chemical corrosion on mechanical properties of boroaluminosilicate glasses has not been well understood. In this work, the BAS glass samples were corroded in a 20 mM Glycine–NaOH buffer solution (pH = 10) at 80 °C for various durations. Within the corrosion durations, the corrosion of the glass is dominated by congruent dissolution. The results show that the elemental composition and structure of the glass surface are not altered significantly during the congruent dissolution, and the corrosion rate is mainly affected by the Si concentration in the solution. The structural change in the process of micro-crack decay is the main factor affecting the mechanical properties of the glass surface. Corrosion leads to the growth of micro-cracks and tip passivation, which causes the hardness and elastic modulus of the glass to first decrease and then increase. As corrosion proceeds, the microcracks are completely destroyed to form micropores, and the pore size and number increase with the corrosion process, resulting in the decrease in surface mechanical properties again. This work reveals the main influencing factors of congruent dissolution on mechanical properties and provides an important reference for the improvement of pharmaceutical glass strength.

show abstract

Surface roughness and morphology evolution of optical glass with micro-cracks during chemical etching

Cited by 16 publications

References 20 publications

Electrodeposition of High-Surface-Area IrO2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction

Electrodeposition of High-Surface-Area IrO2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction

Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching

Impact of Chemical Corrosion on Mechanical Properties of Boroaluminosilicate Pharmaceutical Glasses

Contact Info

Product

Resources

About