Reaction mechanism in the high-pressure synthesis of Hg-cuprates: an in-situ synchrotron diffraction study

High-pressure synthesis (which refers to pressure synthesis in the range of 1 to several GPa) adds a promising additional dimension for exploration of compounds that are inaccessible to traditional chemical methods and can lead to new industrially outstanding materials. It is nowadays a vast exciting field of industrial and academic research opening up new frontiers. In this context, an emerging and important methodology for the rapid exploration of composition-pressure-temperature-time space is the in situ method by synchrotron X-ray diffraction. This review introduces the latest advances of high-pressure devices that are adapted to X-ray diffraction in synchrotrons. It focuses particularly on the “large volume” presses (able to compress the volume above several mm3 to pressure higher than several GPa) designed for in situ exploration and that are suitable for discovering and scaling the stable or metastable compounds under “traditional” industrial pressure range (3–8 GPa). We illustrated the power of such methodology by (i) two classical examples of “reference” superhard high-pressure materials, diamond and cubic boron nitride c-BN; and (ii) recent successful in situ high-pressure syntheses of light-element compounds that allowed expanding the domain of possible application high-pressure materials toward solar optoelectronic and infra-red photonics. Finally, in the last section, we summarize some perspectives regarding the current challenges and future directions in which the field of in situ high-pressure synthesis in industrial pressure scale may have great breakthroughs in the next years.

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High-pressure behavior of davyne [CAN-topology]: An in situ single-crystal synchrotron diffraction study

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2014.07.014 ◽

2014 ◽

Vol 198 ◽

pp. 203-214 ◽

Cited By ~ 5

Author(s):

Paolo Lotti ◽

G. Diego Gatta ◽

Marco Merlini ◽

Michael Hanfland

Keyword(s):

High Pressure ◽

Single Crystal ◽

Diffraction Study ◽

Synchrotron Diffraction ◽

Pressure Behavior

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High Pressure Synthesis of Solid State Materials

MRS Proceedings ◽

10.1557/proc-453-141 ◽

1996 ◽

Vol 453 ◽

Cited By ~ 1

Author(s):

Paul F. Mcmillan

Keyword(s):

High Pressure ◽

High Hardness ◽

New Materials ◽

Crystalline Materials ◽

High Pressure Synthesis ◽

Piston Cylinder ◽

Diamond Anvil ◽

Pressure Synthesis ◽

Temperature Work

AbstractWithin the ASU MRSEC, we are using a combination of high pressure synthesis techniques (multi-anvil, piston cylinder), combined with in situ studies in diamond anvil cells, and ab initio calculations, to prepare a range of new materials at high pressure, and to study their physical properties under extreme conditions of pressure and temperature. Work in progress includes experiments on nitrides, particularly glasses and crystalline materials based in the P3N5-HPN2-PON system, silicate and germanate perovskites and related vanadates and niobates, and high hardness materials in the B-C-N-0 system. Some of our recent results are presented.

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