Evolution of boron clusters in iron tetraborides under high pressure: semiconducting and ferromagnetic superhard materials

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 48012-48023 ◽  
Author(s):  
Xue Jiang ◽  
Jijun Zhao
Keyword(s):  
High Pressure ◽  
Magnetic Materials ◽  
Building Block ◽  
Superhard Materials ◽  
Boron Clusters

The building block of the FeB4 compound transforms from a corrugated B6 ring to an unusual B4 tetrahedron and finally to a cubooctahedral B12 cluster under pressure. The latter two are predicted as superhard semiconductor or superhard magnetic materials.

Unexpected stable phases of tungsten borides

2018 ◽  
Vol 20 (38) ◽  
pp. 24665-24670 ◽  
Author(s):  
Changming Zhao ◽  
Yifeng Duan ◽  
Jie Gao ◽  
Wenjie Liu ◽  
Haiming Dong ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Pressure ◽  
Superhard Materials ◽  
Tungsten Borides

Superhard materials are generally synthesized under high pressure, which makes them expensive. We discovered new hard and superhard tungsten borides at low pressure and even at zero pressure with interesting properties.

trans-[OsIII(salen)(CN)2]−: A New Paramagnetic Building Block for the Construction of Molecule-Based Magnetic Materials

2010 ◽  
Vol 49 (4) ◽  
pp. 1607-1614 ◽  
Author(s):  
Jun-Fang Guo ◽  
Wai-Fun Yeung ◽  
Pui-Ha Lau ◽  
Xiu-Teng Wang ◽  
Song Gao ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Building Block

Automatic Computer Controlled Process for Superhard Materials Production

2010 ◽  
Vol 660-661 ◽  
pp. 483-488 ◽  
Author(s):  
Guerold Sergueevitch Bobrovinitchii ◽  
William Silva Vianna ◽  
Ana Lúcia Diegues Skury ◽  
Sérgio Neves Monteiro ◽  
Rômulo Crespo Tardim
Keyword(s):  
High Pressure ◽  
Cubic Boron Nitride ◽  
Electrical Power ◽  
Superhard Materials ◽  
Operator Experience ◽  
Construction Methods ◽  
Yield And Quality ◽  
Computer Controlled ◽  
Temperature Time

The technologies of superhard materials production, including those for industrial synthesis of diamond and cubic boron nitride at high pressure and high temperature conditions, depend on the operator experience. Moreover, these manually operated processes usually vary in terms of yield and quality of the final product. Owing to the design and construction methods of conventional high pressure devices (HPD), it has not yet been possible to adapt computerized systems for both research and industrial production. In this work, the synthesis of superhard materials was treated as a guided problem under uncertain pressure, temperature, time, and electrical power conditions using the theory of automatic commanded systems. This concept was applied to develop an automatic control for the hydraulic presses that generate the necessary force for the high pressure, based on variable sensors associated with computer programs that command the conditions inside the HPD.

High-brilliance X-ray system for high-pressure in-house research: applications for studies of superhard materials

2006 ◽  
Vol 26 (2) ◽  
pp. 137-143 ◽  
Author(s):  
L. Dubrovinsky ◽  
N. Dubrovinskaia ◽  
I. Kantor ◽  
F. Nestola ◽  
D. Gatta
Keyword(s):  
High Pressure ◽  
Superhard Materials ◽  
X Ray

HAT(CN)6: a new building block for molecule-based magnetic materials

2001 ◽  
Vol 122 (3) ◽  
pp. 535-542 ◽  
Author(s):  
P.S. Szalay ◽  
J.R. Galán-Mascarós ◽  
R. Clérac ◽  
K.R. Dunbar
Keyword(s):  
Magnetic Materials ◽  
Building Block

scholarly journals Parallel Algorithm for the Voltage Profile Simulation for the Synthesis of Superhard Materials Under High Pressure and High Temperature

2012 ◽  
Vol 9 (1) ◽  
pp. 43-53
Author(s):  
Dalessandro Soares Vianna ◽  
João José de Assis Rangel ◽  
Sicilia Ferreira Ponce Pasini Judice ◽  
Marcilene de Fátima Dianin Vianna
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Parallel Algorithm ◽  
Superhard Materials ◽  
Voltage Profile
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