Article
Geochemistry & Geophysics
D. J. Cherniak, Y. Liang
Summary: This study characterizes the chemical diffusion of Ca in natural enstatite and explores its sensitivity to crystallographic orientation, oxygen fugacity, silica activity, and Ca concentration. The results show that Ca diffusion in enstatite is relatively insensitive to these factors, and the diffusion is slower than that of some other cations but faster than others. The obtained diffusion parameters are used to develop a model for the Ca-inopx thermometer and estimate the cooling rates of peridotites and pyroxenites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Busuyi O. Adebayo, Han Yu, Ali A. Rownaghi, Xinhua Liang, Fateme Rezaei
Summary: In this study, Pt nanoparticles were loaded on SiO2, TiO2-SiO2, or ZrO2-SiO2 particles to investigate their performance in sequential adsorption and desorption/catalytic oxidation of benzene. The results showed that Pt nanoparticles and ZrO2 exhibited synergistic effects in catalytic oxidation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Jinfeng Li, Jianguo Huang, Hao Feng, Xiaoyang Wang, Xiangchun Yin, Yuantao Zhang
Summary: The study characterized the structural changes of SiO2-TiO2-ZrO2-RO-Al2O3 (R=Ca, Sr, Ba) multicomponent glass using various techniques, finding that the substitution of TiO2 increases the density and dielectric constant of the glass, but slightly decreases thermal stability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Andrew P. Lange, Koroush Sasan, Leonardus Bimo Bayu Aji, Timothy Y. Yee, Jungmin Ha, F. J. Ryerson, Gabriela Remulla, Rebecca Dylla-Spears
Summary: The mass transport mechanisms of Ti and Ge in TiO2:SiO2 and GeO2:SiO2 direct ink write, additively manufactured glasses were studied. Ti was found to transport through solid state interdiffusion between SiO2 and TiO2 precursor particles, while Ge was more mobile. These results are important for the design of index modifying inks in the direct ink write process.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Dohee Lee, Andrey S. Sokolov, Boncheol Ku, Yu-Rim Jeon, Du Ho Kim, Hyeon Tae Kim, Gun Hwan Kim, Changhwan Choi
Summary: The study investigates the role of inserting a diffusion limiting layer in a synapse device operated by the migration of metal cations to improve linear conductance change characteristics. By inserting a thin SiO2 layer at the Cu/ZrO2 interface, the random diffusion of Cu ions is effectively mitigated, leading to improved multi-level RESET switching characteristics and enhanced linearity of conductance with the number of pulses. Various synaptic characteristics such as potentiation, depression, short-term to long-term memory transition, pulse-paired facilitation, post-tetanic potentiation, and spike timing dependent plasticity were successfully emulated.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Dario F. Zambrano-Mera, Rodrigo Espinoza-Gonzalez, Andreas Rosenkranz, Terry J. Harvey, Tomas Polcar, Paulina Valenzuela, William Gacitua
Summary: The study explores the possibility of enhancing erosion resistance in antireflective coatings through Zr-oxide doping and thermal annealing, and demonstrates that this method can improve the longevity and efficiency of solar panels.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Multidisciplinary
Nuray Yerli Soylu, Anil Soylu, Dilara Nur Dikmetas, Funda Karbancioglu-Guler, Sadriye Kucukbayrak, Melek Erol Taygun
Summary: TiO2-based ceramic nanofiber membranes were synthesized by combining sol-gel and electrospinning processes. The thermal treatment at different temperatures had a significant effect on the properties of the membranes. The nanofiber membranes calcined at 650 and 750 degrees C showed high photocatalytic and antibacterial activities, making them a promising candidate for wastewater treatment.
Article
Engineering, Chemical
Sofiatun Anisah, Masakoto Kanezashi, Hiroki Nagasawa, Toshinori Tsuru
Summary: The TiO2-ZrO2 nanofiltration membranes with Ti/Zr molar ratios of 5/5, 3/7, 1/9, and 0/10 showed sufficient stability in both strong acid and strong alkaline solutions, while membranes with higher titanium content exhibited poorer stability under corrosive conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Leibo Deng, Zhe Fu, Zhang Mingxing, Hao Li, Bin Yao, Jianli He, Hua Chen, Yonghong Ma
Summary: The addition of ZrO2 increased glass stability and decreased crystallization ability; at higher temperatures, mullite and quartz phases first precipitated in the glass matrix, then converted into cordierite.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Ganesh Babu Thiyagarajan, Ekaterina Koroleva, Alexey Filimonov, Sergey Vakhrushev, Ravi Kumar
Summary: This study demonstrates the in-situ nanocrystallization of Pb-stabilized t-ZrO2 in amorphous Si(Pb,Zr)OC matrix, showing high dielectric permittivity and low loss. The comprehensive investigation into the dielectric behavior as a function of temperature and frequency paves the way for the synthesis of PZSiOC ceramic nanocomposites with colossal permittivity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Christian Thieme, Marc Dittmer, Thomas Hoeche, Markus Rampf, Christian Ruessel
Summary: Phase formation in glasses from the Na2O-Y2O3-SiO2-ZrO2 system was studied and the effects of thermal history were investigated. During slow cooling, a precipitate of apatite structure phase (NaY9Si6O26) was observed, whereas the remaining glassy phase was enriched in ZrO2. It was also found that fast cooling resulted in glass formation without instant crystallization. Subsequent heating led to the formation of an unknown phase at lower temperatures and NaYSi2O6 crystals at higher temperatures. Nucleation and crystal growth experiments showed the homogeneous formation of small ZrO2 particles within the samples.
Article
Dentistry, Oral Surgery & Medicine
Saadet Saglam Atsu, Muhammed Emin Aksan, Ali Can Bulut, Faleh Tamimi
Summary: This study found that nanocoating titanium surfaces with SiO2 and TiO2 using ALD technique significantly improved titanium-porcelain bonding strength. Different oxide coatings increased surface roughness, with TiO2 and ZrO2 coatings showing significantly higher surface roughness.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Chemistry, Physical
Ryun Na Kim, Do Hyung Han, Hye Won Yun, Jinho Lee, Sang Ouk Ryu, Woo-Byoung Kim
Summary: By utilizing nitric acid oxidation of Si to form a high-density SiO2 layer, the lattice mismatch at the TiO2/Si interface is reduced, resulting in an improved photocurrent density.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Wentao Cao, Aili Wang, Hengbo Yin
Summary: In this study, TiO2@ZrO2@SiO2@MAA nanocomposites were prepared using the wet chemical deposition method, with different morphologies of coating layers achieved by adjusting pH values. The resulting nanocomposites exhibited improved whiteness, brightness, reduced photocatalytic activity, and good dispersion stability in water.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Guoqin Cao, Chaoyang Chen, Hongjie Xu, Jinjin Ban, Fanfan Liu, Gaihuan Yuan, Honghong Lei, Yujie Su, Junhua Hu
Summary: A mechanism based on oxidation induced bonding reconstruction (OBR) was proposed to optimize phase selection during oxidation of amorphous ZrxSi1-x (0.55 < x < 0.75). The formation of an amorphous bilayer structure and a Si-rich Zr-Si layer synergistically impeded oxygen permeation, leading to enhanced hydro chemical stability.
MATERIALS & DESIGN
(2023)