Study of the Structures and Physical Properties of Calcium Borophosphate Glass Containing Transition Metal Oxides

2016 ◽  
Vol 675-676 ◽  
pp. 397-400
Author(s):  
Worapong Thiemsorn ◽  
Tida Tungyai ◽  
Heiko Hessenkemper
Keyword(s):  
Refractive Index ◽  
Ternary System ◽  
Physical Properties ◽  
Transition Metal Oxides ◽  
Glass Network ◽  
Cross Linking ◽  
Phosphate Chain ◽  
Borophosphate Glass ◽  
Structures And Properties ◽  
Xrd Patterns

This research objected to study the effects of CeO2, Sb2O3 and CoO on the structures and properties of calcium borophosphate glass (CBF) in ternary system 0.42CaO-0.06B2O3-0.52P2O5. The batches were melted at 1200 °C with 5 °C /min for 1 h in an electric furnace. The melts were regular bulk formed by pouring into a stainless mold and were immediately transferred to an annealing lehr at 550 °C for 2 h for testing the properties. The structures and physical properties were investigated. The results showed that all doped CBF glass were completely melted representing only one broad peak in XRD patterns. The structural observations revealed the major units are cross-linking B-O-P and B-O-B triangle and B-O-B tetrahedral units. The dense packing of structural or the shorter phosphate chain length and whether the branching group were achieved as the series CeO2>Sb2O3>CoO. The density, refractive index, glossy, Abbe number increased slightly with increasing of transition oxide concentrations as the series CeO2>Sb2O3>CoO. The microhardness also increased with increasing the concentration of transition oxides as the series CeO2<Sb2O3<CoO due to CoO act as glass-network formers stronger than Sb2O3 and CeO2

Effect of Plasticizer and Cross-Linking Agent on the Physical Properties of Protein Films

2005 ◽  
Vol 10 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Myoung-Suk Lee ◽  
Se-Hee Lee ◽  
Yu-Hyun Ma ◽  
Sang-Kyu Park ◽  
Dong-Ho Bae ◽  
...  
Keyword(s):  
Physical Properties ◽  
Cross Linking ◽  
Protein Films

SnSe, the rising star thermoelectric material: a new paradigm in atomic blocks, building intriguing physical properties

2021 ◽  
Author(s):  
Lin Xie ◽  
Dongsheng He ◽  
Jiaqing He
Keyword(s):  
Physical Properties ◽  
Energy Conversion ◽  
Thermoelectric Material ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
New Paradigm ◽  
Direct Energy Conversion ◽  
Structures And Properties ◽  
Direct Energy

Thermoelectric materials, which enable direct energy conversion between waste heat and electricity, are witnessing exciting developments due to innovative breakthroughs both in materials and the synergistic optimization of structures and properties.

Structures and properties of hemiquinone-substituted oxoporphyrinogens

2009 ◽  
Vol 13 (01) ◽  
pp. 60-69 ◽  
Author(s):  
Jonathan P. Hill ◽  
Katsuhiko Ariga ◽  
Francis D'Souza
Keyword(s):  
Physical Properties ◽  
Redox Reactions ◽  
Photophysical Properties ◽  
Electron Acceptors ◽  
Substitution Pattern ◽  
X Ray ◽  
X Ray Crystallography ◽  
Guest Binding ◽  
Structures And Properties

The structure and physical properties of a series of N-substituted, hemiquinone-substituted oxoporphyrinogens is presented and discussed. Structures of the compounds are dictated by the nature of the substituent, with the substitution pattern being in turn dictated by regioselectivity of N-alkylation. X-ray crystallography and other aggregation properties of the compounds are discussed. Redox reactions are also strongly influenced by N-substitution and substituent identity. Also presented are properties related to guest binding and photophysical properties of oligochromophoric host-guest complexes, involving oxoporphyrinogen, N-substituted with porphyrins and appropriately substituted fullerene guest electron acceptors.

scholarly journals Effect of Cross-Linking Density on the Structures and Properties of Carbodiimide-Treated Gelatin Matrices as Limbal Stem Cell Niches

2018 ◽  
Vol 19 (11) ◽  
pp. 3294 ◽  
Author(s):  
Jui-Yang Lai ◽  
Li-Jyuan Luo ◽  
David Ma
Keyword(s):  
Surface Roughness ◽  
Stem Cell ◽  
Cross Linking ◽  
Epithelial Tissue ◽  
Human Amniotic Membrane ◽  
Limbal Stem Cells ◽  
Structures And Properties ◽  
Cross Linker ◽  
Limbal Stem Cell ◽  
Stem Cell Niches

Given that human amniotic membrane is a valuable biological material not readily available for corneal epithelial tissue engineering, gelatin is considered as a potential alternative to construct a cellular microenvironment. This study investigates, for the first time, the influence of cross-linking density of carbodiimide-treated gelatin matrices on the structures and properties of artificial limbal stem cell niches. Our results showed that an increase in the carbodiimide concentration from 1.5 to 15 mM leads to an upward trend in the structural and suture strength of biopolymers. Furthermore, increasing number of cross-linking bridges capable of linking protein molecules together may reduce their crystallinity. For the samples treated with 50 mM of cross-linker (i.e., the presence of excess N-substituted carbodiimide), abundant N-acylurea was detected, which was detrimental to the in vitro and in vivo ocular biocompatibility of gelatin matrices. Surface roughness and stiffness of biopolymer substrates were found to be positively correlated with carbodiimide-induced cross-link formation. Significant increases of integrin β1 expression, metabolic activity, and ABCG2 expression were noted as the cross-linker concentration increased, suggesting that the bulk crystalline structure and surface roughness/stiffness of niche attributed to the number of cross-linking bridges may have profound effects on a variety of limbal epithelial cell behaviors, including adhesion, proliferation, and stemness maintenance. In summary, taking the advantages of carbodiimide cross-linking-mediated development of gelatin matrices, new niches with tunable cross-linking densities can provide a significant boost to maintain the limbal stem cells during ex vivo expansion.

Glasses in the NaPO3-WO3-NaF ternary system: preparation, physical properties and structural studies

2019 ◽  
Vol 505 ◽  
pp. 379-389 ◽  
Author(s):  
Joao F.V.L. Munhoz ◽  
Silvia Helena Santagneli ◽  
Marcos de Oliveira ◽  
Ana Candida Martins Rodrigues ◽  
Hellmut Eckert ◽  
...  
Keyword(s):  
Ternary System ◽  
Physical Properties ◽  
Structural Studies

Synthesis and Dielectric Properties of [(K0.5Na0.5)0.935Li0.065]NbO3 Added with Mn for Piezoelectric Ceramic

2016 ◽  
Vol 675-676 ◽  
pp. 635-638
Author(s):  
Jukkrit Kongphimai ◽  
Hassakorn Wattanasarn ◽  
Tosawat Seetawan
Keyword(s):  
Crystal Structure ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Physical Properties ◽  
Crystallite Size ◽  
Piezoelectric Ceramic ◽  
Theoretical Density ◽  
Milling Method ◽  
Xrd Patterns

[(K0.5Na0.5 )0.935Li0.065]NbO3–Mn ceramics (Mn = 0, 1.50 and 3 mol %) (KNNL–Mn) were synthesized and measured dielectric properties. Which the K2CO3, Na2CO3, Li2CO3, Nb2O5 and MnO2 (0, 1.5, 3 mol%) were mixed by ball milling method and calcined powders at 1,073 K for 4 h and the sintered at 1,343 K for 2 h in air. The crystal structure was analyzed by XRD technique, the crystallite size was identified by Scherrer’s equation and calculated the theoretical density. It was found that, the XRD patterns of the KNNL–Mn ceramics added with Mn contents was indicated the tetragonal structure and. the crystallite size of Mn = 0, 1.50 and 3 mol% about 32 nm, 34 nm and 57 nm, respectively. The physical properties of the KNNL–Mn ceramics was found that the maximum theoretical density of 90.79 % for Mn = 1.50 mol%. The dielectric constant was found to be maximum of 909.77 and dielectric loss of 0.48 for Mn = 3 mol%.

scholarly journals Reserch on cross-linking densities and fundamental physical properties of rubber.

1993 ◽  
Vol 66 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Hideo NAKAUCHI ◽  
Sakae INOUE ◽  
Kazuo NAITO
Keyword(s):  
Physical Properties ◽  
Cross Linking ◽  
Fundamental Physical

Current Control of Structural and Physical Properties in Spin-Orbit- Coupled Mott Insulators

2021 ◽  
pp. 135-158
Author(s):  
Gang Cao ◽  
Lance E. DeLong
Keyword(s):  
Physical Properties ◽  
Transition Metal Oxides ◽  
Information Technologies ◽  
Degrees Of Freedom ◽  
Electrical Current ◽  
Current Control ◽  
Mott Insulators ◽  
Spin Orbit ◽  
Electrical Currents ◽  
Spin Orbit Interactions

Electrical current as a means to control structural and related physical properties has been recognized only recently. The application of small electrical currents in sensitive detector and control applications, and in information technologies, is often preferable to other external stimuli. However, until recently it has not been widely accepted that electrical current can readily couple to the lattice, orbital, and spin degrees of freedom. Mounting experimental evidence has indicated that a combination of strong spin-orbit interactions and a distorted crystal structure in magnetic Mott insulators may be sufficient for electrical current to control structural and related properties. Current control of quantum states in 4d- and 5d-transition metal oxides has therefore rapidly expanded as a key research topic. This chapter presents two model systems, Ca2RuO4 and Sr2IrO4, in which applied current effectively controls the lattice, and thus the physical properties.

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