In situ synthesis, structure, and properties of a dendritic branched nano‐thickening agent for high temperature fracturing fluid

2019 ◽  
Vol 137 (10) ◽  
pp. 48446
Author(s):  
Jun Tang ◽  
Haibo Li ◽  
Shengdong Yan ◽  
Siming Yan
2004 ◽  
Vol 59 (2) ◽  
pp. 202-215 ◽  
Author(s):  
Holger Emme ◽  
Tanja Nikelski ◽  
Thomas Schleid ◽  
Rainer Pöttgen ◽  
Manfred Heinrich Möller ◽  
...  

The new orthorhombic meta-oxoborates RE(BO2)3 (≡REB3O6) (RE = Dy-Lu) have been synthesized under high-pressure and high-temperature conditions in a Walker-type multianvil apparatus at 7.5 GPa and 1100 °C. They are isotypic to the known ambient pressure phase Tb(BO2)3, space group Pnma. In contrast to Dy(BO2)3, which was also obtained in small amounts under high-temperature conditions, the preparation of the higher orthorhombic homologues RE(BO2)3 (RE = Ho-Lu) was only possible using high-pressure. The meta-oxoborates RE(BO2)3 (RE = Dy-Er) were synthesized as pure products, whereas the orthorhombic phases with RE = Tm-Lu were only obtained as byproducts. With the exception of Yb(BO2)3 it was possible to establish single crystal data for all compounds. The results of temperature-resolved in-situ powder-diffraction measurements, DTA, IR-spectroscopic investigations, and magnetic properties are also presented.


2019 ◽  
Vol 7 (5) ◽  
pp. 1345-1352 ◽  
Author(s):  
Suqian Meng ◽  
Yayun Zhou ◽  
Wei Wan ◽  
Shi Ye ◽  
Qinyuan Zhang

Stability test shows that the luminous efficiency of WLED with CSFM-Y reduces only 4% after duration of 120 h in the testing condition of high humidity (85%) and high temperature (85 °C), while the one with pure CSFM declines 28%.


Metals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 303 ◽  
Author(s):  
Jing Zeng ◽  
Liping Liu ◽  
Jiazhi Yuan ◽  
Hua Chen

2012 ◽  
Vol 29 ◽  
pp. 8-12 ◽  
Author(s):  
Liang Li ◽  
Aiguo Zhou ◽  
Libo Wang ◽  
Shangsheng Li ◽  
Dongxu Wu ◽  
...  

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