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How the Anatase-to-Rutile Ratio Influences theDielectric properties? 

Phase (matter)
Dielectric loss
Crystallite
Anatase
Titanium dioxide
Best insight from top research papers

The Anatase-to-Rutile ratio significantly impacts the dielectric properties of TiO2 materials. Research shows that TiO2 thin films exhibit varying dielectric constants based on the proportion of anatase and rutile phases . Specifically, an increase in the rutile phase content leads to higher dielectric constants but lower dielectric losses . Moreover, the presence of rutile at the bottom of TiO2 nanotubes limits photo-generated electron transfer, affecting the overall charge transport properties. Additionally, the dielectric constant of TiO2 thin films is influenced by the microstructure, with the anatase phase having a lower dielectric constant compared to the rutile phase. Therefore, controlling the Anatase-to-Rutile ratio in TiO2 materials is crucial for tailoring their dielectric properties.

Answers from top 5 papers

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Papers (5)Insight
Journal Article•DOI
Dielectric relaxation and conduction mechanisms in sprayed TiO2 thin films as a function of the annealing temperature
Albert Juma, Albert Juma, Ilona Oja Acik, Arvo Mere, Malle Krunks 
14 Mar 2016-Applied Physics A
4 Citations
The dielectric constant decreases from 45-50 (anatase) to 123 (rutile) as the anatase-to-rutile transformation occurs, impacting the dielectric properties of TiO2 thin films significantly.
Journal Article•DOI
Influence of Anatase-Rutile Phase Transformation on Dielectric Properties of Sol-Gel Derived TiO2 Thin Films
Jin Young Kim, Dong Wan Kim, Hyun Suk Jung, Kug Sun Hong 
05 Aug 2005-Japanese Journal of Applied Physics
44 Citations
The anatase-to-rutile ratio influences dielectric properties of TiO2 thin films; increasing rutile phase raises dielectric constant while lowering dielectric losses due to phase transformation.
Journal Article•DOI
Influence of anatase-rutile phase transformation on dielectric properties of sol-gel derived TiO2 thin films
Jin Young Kim, Hyun Suk Jung, Jung Hong No, Jeong Ryeol Kim, Kug Sun Hong 
01 Jul 2006-Journal of Electroceramics
87 Citations
The dielectric properties of TiO2 thin films are directly influenced by the Anatase-to-Rutile ratio, with dielectric constants increasing with more Rutile phase and vice versa.
Open access•Journal Article•DOI
Influence of the anatase/rutile ratio on the charge transport properties of TiO2-NTs arrays studied by dual wavelength opto-electrochemical impedance spectroscopy.
T. Cottineau, Hubert Cachet, Valérie Keller, Eliane Sutter 
29 Nov 2017-Physical Chemistry Chemical Physics
14 Citations
The anatase-to-rutile ratio in TiO2-NTs affects charge transport properties, with rutile at the nanotubes' bottom limiting photo-generated electron transfer, impacting dielectric properties.
Journal Article•DOI
Hydrogenation Influences on the Structural, Optical, and Insulating Properties of (Bi+Cr) Codoped Anatase TiO2 Nanoparticles
A.A. Dakhel
09 Apr 2023-Crystal Research and Technology
Not addressed in the paper.

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Why xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 have good electricl properties?5 answersThe xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 ceramics exhibit good electrical properties due to various factors. These materials show high piezoelectric coefficients, making them essential for functional industrial applications. Additionally, the solid-state reaction synthesis method results in single-phase compounds with favorable crystal structures, contributing to their excellent electrical characteristics. The compositions also display enhanced energy storage efficiency and recoverable energy density, making them promising for high energy density capacitor applications. Furthermore, the dielectric, ferroelectric, and impedance properties of these ceramics are influenced by grain size variations and the presence of a solid solution in the grain boundary, impacting their electrical performance positively.
What is the role of anatase in enhancing Li ion conductivity?5 answersAnatase TiO2 plays a crucial role in enhancing Li ion conductivity due to its unique properties. Anatase TiO2 structures, such as one-dimensional nanotube bundles, dual-phase nanosheets with TiO2(B), and anatase/rutile TiO2 anchored carbon nanotube composites, provide efficient electrode/electrolyte contact areas, fast ion/electron diffusion pathways, and improved Li+ diffusion distances. These structures exhibit high specific capacities, excellent rate capabilities, and superior cycling stability in lithium ion batteries. Additionally, anatase TiO2 materials show enhanced electronic conductivity, charge transfer, and Li-ion diffusion, leading to improved electrochemical performance. The anatase phase's crystal structure and morphology contribute significantly to the overall conductivity enhancement in Li ion batteries.
What is the Poisson's ratio of Rutile TiO2?5 answersThe Poisson's ratio of Rutile TiO2 is not mentioned in the abstracts provided.
What are the different roles of oxygen vacancies in anatase and rutile?4 answersOxygen vacancies in anatase and rutile have different roles. In anatase, oxygen vacancies can promote the phase transformation of anatase and reduce the phase-change energy, leading to the rearrangement of the structure. The vacancies can also migrate from the bulk to the subsurface and from the subsurface to the bulk, resulting in a high concentration of vacancies at the subsurface sites. On the other hand, in rutile, oxygen vacancies introduce defect states in the band gap, which exhibit strong electron-phonon coupling and enhance electron-hole recombination. This accelerates the recombination of photoexcited carriers and reduces the carrier lifetime.
Which one better for catalysis application? TiO2 anatase or rulite?3 answersTiO2 anatase and rutile have different properties for catalysis applications. In terms of photocatalysis, TiO2 coatings with mixed anatase-rutile polymorphs showed enhanced photocatalytic activity compared to pure anatase coatings. However, TiO2 nanotubes with anatase or anatase/rutile mixed-phase exhibited different charge transport behaviors, with the mixed-phase nanotubes showing higher activation energy and trap density. Additionally, the anatase/bronze TiO2 heterojunction has been proven to be a promising candidate for enhanced photocatalysis and photothermal catalysis. On the other hand, for selective hydrogenation reactions, supported Ir/TiO2 catalysts with anatase nanocrystals exposing {1 0 1} planes showed higher reaction rates compared to those with {0 0 1} planes. Overall, the choice between TiO2 anatase and rutile for catalysis applications depends on the specific reaction and desired properties.

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