Preparation of High-Purity T12CanBa2Cun+1O6+2n (n=1,2) Powders from Stoichiometric Reactant Mixtures

1989 ◽  
Vol 169 ◽  
Author(s):  
Nae-Lih Wu ◽  
Yeong Der Yao
Keyword(s):  
High Purity ◽  
Single Phase ◽  
Synthesis Methods ◽  
Powder Synthesis ◽  
One Step

AbstractNew powder synthesis Methods have been developed for preparing the single-phase T12CaBa2Cu2O8 (the 2122 coapound) and T12CaBa2Cu3O10 (the 2223 coapound) powders froa stoichioaetric reactant mixtures. The 2122 coapound was prepared froa a stoichioaetric Mixture of T12O3, CuO, and CaBa2CuO4, while the 2223 coapound was prepared froa the same aixture but with additional CaO and CuO to Batch the correct (T1:Ca:Ba:Cu=2:2:2:3) stoichioaetry. The single-phase 2122 saaples with Tc above 110 K were obtained by using one-step calcination at 830°C, while the 2223 saaples with Tc ranging between 115 and 120 K were obtained by employing a first calcination at 830°C for 5 hrs and a second calcination at 870°C. Powder aelting, which is strongly associated with the conventional aethods, was significantly suppressed in the new aethods.

Instant 99mTc Compounds

1971 ◽  
Vol 10 (03) ◽  
pp. 245-251 ◽  
Author(s):  
P. Richards ◽  
W. C. Eckelman
Keyword(s):  
Physical Properties ◽  
High Purity ◽  
Analytical Techniques ◽  
Full Potential ◽  
Labeled Compounds ◽  
Ph Adjustment ◽  
One Step ◽  
Stannous Ion ◽  
99Mtc Radiopharmaceuticals ◽  
Potential Use

SummaryThe full potential use of technetium has not been achieved despite its ideal physical properties, dosimetry and availability because of the complex preparations required for 99mTc radiopharmaceuticals. One of the goals of our work is to develop techniques for the preparation of high-purity 99mTc compounds which can be easily prepared, ideally by adding pertechnetate to a prepared solution.The use of stannous ion as reducing agent for technetium makes it possible to obtain such one-step, high-purity products. All non-radioactive components can be premixed in a single vial before addition of the radioactive pertechnetate. No final pH adjustment, further chemical manipulation or purification is required.Procedures for two instantly labeled compounds have been developed to date: 99mTc DTPA and 99mTc HSA. The 99mTc DTPA is prepared by adding pertechnetate to a previously prepared solution of stannous ion and CaNa3 DTPA which has been stored at pH 4. The 99mTc HSA is prepared by adding pertechnetate to a solution of stannous ion and HSA. The parametric variations and analytical techniques involved in formulating these procedures are described. It appears that development of kits for other biologically interesting compounds may be possible using similar procedures.

Unveiling the Magnesium Storage Mechanisms of Co-Sputtered Indium-Tin Alloy Films Using Operando X-ray Diffraction

2021 ◽  
Author(s):  
Wenrun Cui ◽  
Meijia Song ◽  
Guixing Jia ◽  
Yu Wang ◽  
Wanfeng Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Single Phase ◽  
Clear Understanding ◽  
X Ray Diffraction ◽  
Alloy Films ◽  
X Ray ◽  
Electrochemical Reactivity ◽  
One Step ◽  
Magnesium Ion Batteries ◽  
Pure Sn

Abstract Tin (Sn)-based anodes have drawn extensive attention for magnesium ion batteries (MIBs) owing to their low reaction potentials, high theoretical capacities, and compatibility with conventional electrolytes. However, their poor electrochemical reactivity, sluggish kinetics, and large volume changes have obstructed progresses. Additionally, a clear understanding of the Mg storage chemistry is crucial for the development of high-performance MIBs. Here, we prepared self-supporting In-Sn alloy films with different compositions and phase constitutions via a one-step magnetron co-sputtering. As benchmarked with pure Sn film, the single-phase and biphase In-Sn alloy films effectively trigger the alloying reaction of Sn with Mg and further increasing of In significantly improves the electrochemical reactivity of the In-Sn electrodes. More importantly, operando X-ray diffraction was performed to unveil the magnesiation/demagnesiation mechanisms of the In0.2Sn0.8, In0.2Sn0.8/In3Sn and In3Sn electrodes, showing that In0.2Sn0.8 and In3Sn display different Mg storage mechanisms when existing alone or biphase coexisting. Our findings highlight the significance of the electrode design and mechanism investigations for MIBs.

scholarly journals One-step ultra-rapid fabrication and thermoelectric properties of Cu2Se bulk thermoelectric material

RSC Advances ◽  
2019 ◽  
Vol 9 (19) ◽  
pp. 10508-10519 ◽  
Author(s):  
Tiezheng Hu ◽  
Yonggao Yan ◽  
Si Wang ◽  
Xianli Su ◽  
Wei Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Properties ◽  
Single Phase ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Thermoelectric Energy ◽  
Rapid Fabrication ◽  
One Step ◽  
First Time

Cu2Se is a promising material for thermoelectric energy conversion. Fully dense single-phase bulk Cu2Se was prepared by the combination of self-propagating high-temperature synthesis with in situ quick pressing for the first time.

Synthesis of single phase BiFeO[sub 3] by one step method

2013 ◽  
Author(s):  
Deepika Bhuwal ◽  
Vilas Shelke
Keyword(s):  
Single Phase ◽  
Step Method ◽  
One Step

scholarly journals A fluorine-substituted pyrrolidinium-based ionic liquid for high-voltage Li-ion batteries

2020 ◽  
Vol 56 (53) ◽  
pp. 7317-7320 ◽  
Author(s):  
Qian Liu ◽  
Chia-Wei Hsu ◽  
Trevor L. Dzwiniel ◽  
Krzysztof Z. Pupek ◽  
Zhengcheng Zhang
Keyword(s):  
Ionic Liquid ◽  
High Voltage ◽  
High Purity ◽  
Li Ion Batteries ◽  
One Step ◽  
Li Ion

Fluorinated pyrrolidinium bis(fluorosulfonyl)imides were successfully synthesized using a facile one-step reaction by reacting fluorinated pyrrolidine with CH3FSI with high purity and yield. The new IL shows good performance in Li-ion batteries.

Technological aspects of preparation of high-purity compounds for sol-gel and pyrolytic synthesis methods

2008 ◽  
Vol 34 (4) ◽  
pp. 515-518 ◽  
Author(s):  
E. E. Grinberg ◽  
E. Yu. Sudarikova ◽  
V. V. Syrychko ◽  
I. E. Strel’nikova ◽  
V. V. Potelov ◽  
...  
Keyword(s):  
High Purity ◽  
Sol Gel ◽  
Synthesis Methods
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