Effect of different acid corrosion reagents on de-cobalt effect and performance of PDC at room temperature

ABSTRACTThe formation and stability of radiation-induced defects in structural materials in reactor environments significantly effects their integrity and performance. Hydrogen, which may be present in significant quantities in future reactors, may play an important role in defect evolution. To characterize the effect of hydrogen on cascade damage evolution, in-situ TEM self-ion irradiation and deuterium implantation was performed, both sequentially and concurrently, on nickel. This paper presents preliminary results characterizing dislocation loop formation and evolution during room temperature deuterium implantation and self-ion irradiation and the consequence of the sequence of irradiation. Hydrogen isotope implantation at room temperature appears to have little or no effect on the final dislocation loop structures that result from self-ion irradiation, regardless of the sequence of irradiation. Tilting experiments emphasize the importance of precise two-beam conditions for characterizing defect size and structure.

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DISCUSSION OF RELATIONSHIP BETWEEN INDOOR ENVIRONMENTAL COMFORT AND PERFORMANCE IN SIMPLE TASK : The influence of arousal caused by room temperature and scent on the performance

Journal of Environmental Engineering (Transactions of AIJ) ◽

10.3130/aije.68.75_3 ◽

2003 ◽

Vol 68 (572) ◽

pp. 75-80 ◽

Cited By ~ 7

Author(s):

Taemi GOHARA ◽

Go IWASHITA

Keyword(s):

Room Temperature ◽

Simple Task ◽

And Performance

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Room temperature production of graphene oxide with thermally labile oxygen functional groups for improved lithium ion battery fabrication and performance

Journal of Materials Chemistry A ◽

10.1039/c9ta02244a ◽

2019 ◽

Vol 7 (16) ◽

pp. 9646-9655 ◽

Cited By ~ 7

Author(s):

Jiadong Qin ◽

Yubai Zhang ◽

Sean E. Lowe ◽

Lixue Jiang ◽

Han Yeu Ling ◽

...

Keyword(s):

Graphene Oxide ◽

Lithium Ion Battery ◽

Functional Groups ◽

Room Temperature ◽

Synthesis Method ◽

Lithium Ion ◽

Temperature Synthesis ◽

Room Temperature Synthesis ◽

Oxygen Functional Groups ◽

And Performance

We report a room-temperature synthesis method to produce graphene oxide with thermally-labile oxygen functional groups.

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Magnetic Properties of Some Hydrated Transition Metal Oxide and Hydroxide Nanoparticles Synthesized in Different Media

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.727 ◽

2010 ◽

Vol 123-125 ◽

pp. 727-730 ◽

Cited By ~ 1

Author(s):

Abdulaziz A. Bagabas ◽

Khalil A. Ziq ◽

Ahmad F. Salem ◽

Emad S. Addurihem

Keyword(s):

Particle Size ◽

Transition Metal ◽

Room Temperature ◽

Permanent Magnets ◽

Cost Effective ◽

Precipitation Method ◽

Energy Product ◽

Wide Range ◽

Precipitation Medium ◽

And Performance

Nanoscale particle size of metal oxides and hydroxides showed enhanced various physical properties and performance. We established a simple, cost-effective, room-temperature (RT) precipitation method for the preparation of the magnetic, first-raw transition metal (TM) hydrated oxide and hydroxide nanoparticles. This method is based on the use of the TM nitrate, as the metal source, and cyclohexylamine (CHA), as a precipitating agent, either in the water (H2O) or ethanol (EtOH) medium. We found that the precipitation medium and the identity of precipitated TM strongly affect the morphology, particle size, and magnetism of the product. The morphology varies from spherical, to rectangular, to rod shape; while the size varies in the range of 5-30 nm. All samples showed paramagnetic behavior with Curie temperatures span over a wide range (20-150K). Huge hysteresis looses has been observed for manganese (Mn) sample, prepared in H2O. The coercively (Hc) at 4.2K for this sample is about 1.5T, which is comparable to the strongest permanent magnets (Nd-based magnets) available at room temperature. The energy product (Hc*MR) is about 4.5*105 (emu/g)Oe.

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Synthesis, characterization and performance of zinc ferrite nanorods for room temperature sensing applications

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2014.08.190 ◽

2015 ◽

Vol 618 ◽

pp. 475-483 ◽

Cited By ~ 55

Author(s):

Archana Singh ◽

Ajendra Singh ◽

Satyendra Singh ◽

Poonam Tandon ◽

B.C. Yadav ◽

...

Keyword(s):

Zinc Ferrite ◽

Room Temperature ◽

Temperature Sensing ◽

Sensing Applications ◽

And Performance

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Research on Preparation and Performance of Vandium Tailings-based Geopolymer

MRS Proceedings ◽

10.1557/opl.2012.412 ◽

2012 ◽

Vol 1380 ◽

Cited By ~ 1

Author(s):

Tie-jun Chen ◽

Yi-min Zhang ◽

Xiang-ke Jiao ◽

Jie Zhao

Keyword(s):

Room Temperature ◽

Value Added ◽

Xrd Analysis ◽

Sodium Aluminate ◽

Molding Process ◽

Stone Coal ◽

Alkali Fusion ◽

Maximum Compressive Strength ◽

And Performance ◽

Sem Analyses

ABSTRACTVanadium-beard bone coal is one of important vanadium resources in China. to extract vanadium tailings from Stone coal is prduced after extracted vanadium from stone coal through the roasting, leaching and other processes. About 120-150 tons of tailings will be produced in extracting 1 ton of vanadium pentoxide. A lot of tailings that are willfully piled up have caused serious environmental pollution and wasting of resources; it is therefore necessary to realize its resource utilization. This study increases the activity of vanadium tailings by means of alkali fusion, and then uses different alkali activators to react with vanadium tailings so that geopolymer with high value added is produced. Sample of geopolymer is acquired from mixture containing vanadium tailings, alkali activators, water and a little sodium aluminate through compression-molding process under 20MPa pressure. After cured in room temperature for three days, the maximum compressive strength of the sample can reach 36.2MPa. XRD analysis indicates: quartz, the major crystal phase in vanadium tailings is decomposed and the activity of vanadium tailings is heightened. FTIR and SEM analyses show: structural change having important impact on the mechanical strength of geopolymer occurred during the process of vanadium tailings generating geopolymer.

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Preparation and performance of CuFe2O4 and ZnFe2O4 magnetic nanocrystals

Materials Research Express ◽

10.1088/2053-1591/ac40b6 ◽

2021 ◽

Author(s):

Q.G Jia ◽

S.H. Liang ◽

Q.X Wang

Keyword(s):

Saturation Magnetization ◽

Crystal Structures ◽

Room Temperature ◽

Magnetic Nanocrystals ◽

And Performance ◽

Spinel Structures ◽

20 Nm

Abstract Based on the coprecipitation of FeSO4(NH4)2SO4 with CuCl2 and ZnSO4, CuFe2O4 and ZnFe2O4 nanocrystals were successfully synthesized. The morphology and the crystal structures of the nanoparticles were studied via SEM, TEM and XRD, which showed that MFe2O4 samples were formed aggregated nanoparticles with crystal sizes of 16~20 nm with a narrow dispersion in size. The samples had the typical spinel structures. Magnetic analyses demonstrated that the CuFe2O4 sample had the saturation magnetization (Ms) of 10.10 emu/g with the coercivity of 3459.39 Oe, while the ZnFe2O4 sample had the Ms of 8.27 emu/g with the coercivity of 25.42 Oe at room temperature, respectively.

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Effects of Room Temperature Stretching and Annealing on the Crystallization Behavior and Performance of Polyvinylidene Fluoride Hollow Fiber Membranes

Membranes ◽

10.3390/membranes10030038 ◽

2020 ◽

Vol 10 (3) ◽

pp. 38 ◽

Cited By ~ 1

Author(s):

Yuanhui Tang ◽

Yakai Lin ◽

Hanhan Lin ◽

Chunyu Li ◽

Bo Zhou ◽

...

Keyword(s):

Tensile Strength ◽

Pore Size ◽

Hollow Fiber ◽

Polyvinylidene Fluoride ◽

Room Temperature ◽

Crystallization Behavior ◽

Hollow Fiber Membranes ◽

The Mean ◽

And Performance ◽

Stretching Ratio

A treatment consisting of room temperature stretching and subsequent annealing was utilized to regulate the morphology and performance of polyvinylidene fluoride (PVDF) hollow fiber membranes. The effects of stretching ratios and stretching rates on the crystallization behavior, morphology, and performance of the PVDF membranes were investigated. The results showed that the treatment resulted in generation of the β crystalline phase PVDF and increased the crystallinity of the membrane materials. The treatment also brought about the orientation of the membrane pores along the stretching direction and led to an increase in the mean pore size of the membranes. In addition, as the stretching ratio increased, the tensile strength and permeation flux were improved while the elongation at break was depressed. However, compared to the stretching ratio, the stretching rate had less influence on the membrane structure and performance. In general, as the stretching ratio was 50% and the stretching rate was 20 mm/min, the tensile strength was increased by 36% to 7.47 MPa, and the pure water flux was as high as 776.28 L/(m2·h·0.1bar), while the mean pore size was not changed significantly. This research proved that the room temperature stretching and subsequent annealing was a simple but effective method for regulating the structure and the performance of the PVDF porous membranes.

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