Pub Date : 2021-06-08DOI: 10.1080/08957959.2021.1961765
K. Cherednichenko, Y. Le Godec, V. Solozhenko
ABSTRACT Two novels boron-rich selenides, orthorhombic B6Se and rhombohedral B12Se, have been recently synthesized at high pressures and high temperatures. Room-temperature compressibilities of these phases were studied in a diamond anvil cell using synchrotron powder X-ray diffraction. A fit of experimental p–V data by the third-order Birch–Murnaghan equation of state yielded the bulk moduli of 155(2) GPa for B12Se and 144(3) GPa for B6Se. No pressure-induced phase transitions have been observed in the studied pressure range, that is, up to 35 GPa.
{"title":"Equations of state of new boron-rich selenides B6Se and B12Se","authors":"K. Cherednichenko, Y. Le Godec, V. Solozhenko","doi":"10.1080/08957959.2021.1961765","DOIUrl":"https://doi.org/10.1080/08957959.2021.1961765","url":null,"abstract":"ABSTRACT Two novels boron-rich selenides, orthorhombic B6Se and rhombohedral B12Se, have been recently synthesized at high pressures and high temperatures. Room-temperature compressibilities of these phases were studied in a diamond anvil cell using synchrotron powder X-ray diffraction. A fit of experimental p–V data by the third-order Birch–Murnaghan equation of state yielded the bulk moduli of 155(2) GPa for B12Se and 144(3) GPa for B6Se. No pressure-induced phase transitions have been observed in the studied pressure range, that is, up to 35 GPa.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"267 - 274"},"PeriodicalIF":2.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41522085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/08957959.2021.1921173
G. Spiekermann, L. Libon, C. Albers, R. Sakrowski, S. Petitgirard, C. Sahle, M. Sundermann, H. Gretarsson, I. Sergueev, C. Sternemann, M. Wilke, M. Murakami
ABSTRACT We describe the use of a silver-coated 90 parabolic mirror of 33 mm focal length as objective for imaging, on-axis laser heating and radiospectrometric temperature measurements of a sample compressed in a diamond anvil cell in a laser heating system. There, spatial resolution and imaging quality of the parabolic mirror are similar to the one of a 10× objective. The temperature measurements between 500 and 900 nm are essentially free from chromatic aberration. The parabolic mirror was also perforated with a 220-μm hole, allowing for on-axis imaging, laser heating and incidence of X-rays simultaneously at synchrotron facilities. The parabolic mirror is thus a well-suited alternative to existing refractive and reflective objectives in laboratory and synchrotron laser heating systems.
{"title":"Reflective imaging, on-axis laser heating and radiospectrometry of samples in diamond anvil cells with a parabolic mirror","authors":"G. Spiekermann, L. Libon, C. Albers, R. Sakrowski, S. Petitgirard, C. Sahle, M. Sundermann, H. Gretarsson, I. Sergueev, C. Sternemann, M. Wilke, M. Murakami","doi":"10.1080/08957959.2021.1921173","DOIUrl":"https://doi.org/10.1080/08957959.2021.1921173","url":null,"abstract":"ABSTRACT We describe the use of a silver-coated 90 parabolic mirror of 33 mm focal length as objective for imaging, on-axis laser heating and radiospectrometric temperature measurements of a sample compressed in a diamond anvil cell in a laser heating system. There, spatial resolution and imaging quality of the parabolic mirror are similar to the one of a 10× objective. The temperature measurements between 500 and 900 nm are essentially free from chromatic aberration. The parabolic mirror was also perforated with a 220-μm hole, allowing for on-axis imaging, laser heating and incidence of X-rays simultaneously at synchrotron facilities. The parabolic mirror is thus a well-suited alternative to existing refractive and reflective objectives in laboratory and synchrotron laser heating systems.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"142 - 154"},"PeriodicalIF":2.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1921173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48136898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/08957959.2021.1910254
C. M. Howard, N. Walte
ABSTRACT A new custom-designed cooling system is described that was developed for the SAPHiR three-axis multi-anvil press with MA6-6 anvil geometry at the FRM II neutron source in Garching. The system was designed to remove heat from the secondary anvils by flowing a cryogen around custom-designed cooling rings or cooling jackets. Currently, this cryo-system is capable of achieving temperatures of 83 K without interfering with the anvil geometry and pressure transfer, thus not limiting the attainable maximum pressure or the capability of performing deformation experiments. In this study, pressures of up to ca. 8 GPa were attained at 83 K with sample volumes up to 130 mm3. The system is portable and can be implemented into any three-axis multi-anvil press with a MA6-6 anvil geometry, opening up new areas of high pressure cryo-research at synchrotron and neutron facilities, including investigating the interior of icy moons.
{"title":"New cooling system for a three-axis multi-anvil press with 6-6 geometry","authors":"C. M. Howard, N. Walte","doi":"10.1080/08957959.2021.1910254","DOIUrl":"https://doi.org/10.1080/08957959.2021.1910254","url":null,"abstract":"ABSTRACT A new custom-designed cooling system is described that was developed for the SAPHiR three-axis multi-anvil press with MA6-6 anvil geometry at the FRM II neutron source in Garching. The system was designed to remove heat from the secondary anvils by flowing a cryogen around custom-designed cooling rings or cooling jackets. Currently, this cryo-system is capable of achieving temperatures of 83 K without interfering with the anvil geometry and pressure transfer, thus not limiting the attainable maximum pressure or the capability of performing deformation experiments. In this study, pressures of up to ca. 8 GPa were attained at 83 K with sample volumes up to 130 mm3. The system is portable and can be implemented into any three-axis multi-anvil press with a MA6-6 anvil geometry, opening up new areas of high pressure cryo-research at synchrotron and neutron facilities, including investigating the interior of icy moons.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"119 - 131"},"PeriodicalIF":2.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1910254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44247968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/08957959.2021.1931168
Guoyin Shen, Jesse S. Smith, C. Kenney-Benson, S. Klotz
ABSTRACT We have measured the luminescence shifts of the ruby’s R1- and R2-lines and the line of 5D0→7F0 from Sm2+:SrFCl corresponding to the melting pressure of mercury that is recommended by the AIRAPT task force as an International Practical Pressure Scale (IPPS). The linear coefficients of the pressure dependence of the R1-, R2-lines, and the luminescence line of Sm2+:SrFCl are determined to be 0.3722 ± 0.002, 0.3796 ± 0.002, and 1.123 ± 0.002 nm/GPa, respectively. The results not only put tight constraints on the initial slopes of ruby and Sm2+:SrFCl gauges, but also link the luminescence-based pressure gauges to the more fundamental primary piston gauges.
{"title":"Calibration of ruby (Cr3+:Al2O3) and Sm2+:SrFCl luminescence lines from the melting of mercury: constraints on the initial slopes","authors":"Guoyin Shen, Jesse S. Smith, C. Kenney-Benson, S. Klotz","doi":"10.1080/08957959.2021.1931168","DOIUrl":"https://doi.org/10.1080/08957959.2021.1931168","url":null,"abstract":"ABSTRACT We have measured the luminescence shifts of the ruby’s R1- and R2-lines and the line of 5D0→7F0 from Sm2+:SrFCl corresponding to the melting pressure of mercury that is recommended by the AIRAPT task force as an International Practical Pressure Scale (IPPS). The linear coefficients of the pressure dependence of the R1-, R2-lines, and the luminescence line of Sm2+:SrFCl are determined to be 0.3722 ± 0.002, 0.3796 ± 0.002, and 1.123 ± 0.002 nm/GPa, respectively. The results not only put tight constraints on the initial slopes of ruby and Sm2+:SrFCl gauges, but also link the luminescence-based pressure gauges to the more fundamental primary piston gauges.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"175 - 183"},"PeriodicalIF":2.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1931168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43461760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-03DOI: 10.1080/08957959.2021.1924702
I. Korobeynikov, A. Y. Usik, T. E. Govorkova, S. Emelyanova, V. Marchenkov
ABSTRACT The Heusler alloys are promising material for various applications, including thermoelectric power generators. There are several ways to improve their properties, among which the substitution of constituent elements, nanostructuring, temperature treatment, thin films engineering etc. This work is devoted to the experimental study of thermoelectric properties of Fe–V–Al-based Heusler alloys with different compositions under high pressure. The Seebeck coefficient and electrical resistance of several compounds were measured as a function of applied pressure up to 10 GPa at room temperature. The experimental results demonstrated a diversity of pressure responses of the thermoelectric properties that can be observed in chemically similar Heusler alloys under variation in their compositions. Moderate enhancing of the thermoelectric power factor, S 2/r (where S is the Seebeck coefficient and r is the electrical resistivity) was observed in Fe-rich Fe2.1V0.91Al0.99 compound at a pressure about ∼1 GPa. It was found that all alloys with weak deviation from stoichiometric composition had a feature in their S (P) pressure behavior at P∼2 GPa which could be related to semimetal-metal phase transition.
{"title":"Nonstoichiometric Fe–V–Al full Heusler alloys under high pressure: thermoelectric properties","authors":"I. Korobeynikov, A. Y. Usik, T. E. Govorkova, S. Emelyanova, V. Marchenkov","doi":"10.1080/08957959.2021.1924702","DOIUrl":"https://doi.org/10.1080/08957959.2021.1924702","url":null,"abstract":"ABSTRACT The Heusler alloys are promising material for various applications, including thermoelectric power generators. There are several ways to improve their properties, among which the substitution of constituent elements, nanostructuring, temperature treatment, thin films engineering etc. This work is devoted to the experimental study of thermoelectric properties of Fe–V–Al-based Heusler alloys with different compositions under high pressure. The Seebeck coefficient and electrical resistance of several compounds were measured as a function of applied pressure up to 10 GPa at room temperature. The experimental results demonstrated a diversity of pressure responses of the thermoelectric properties that can be observed in chemically similar Heusler alloys under variation in their compositions. Moderate enhancing of the thermoelectric power factor, S 2/r (where S is the Seebeck coefficient and r is the electrical resistivity) was observed in Fe-rich Fe2.1V0.91Al0.99 compound at a pressure about ∼1 GPa. It was found that all alloys with weak deviation from stoichiometric composition had a feature in their S (P) pressure behavior at P∼2 GPa which could be related to semimetal-metal phase transition.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"184 - 197"},"PeriodicalIF":2.0,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1924702","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44458030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-24DOI: 10.1080/08957959.2021.1903457
K. Takemura
ABSTRACT The characteristics of hydrostatic stress conditions are discussed and compared with real experimental observations made under high pressure with a diamond-anvil cell. While fluid pressure-transmitting media give a well-defined single stress condition, solid pressure-transmitting media give a variety of stress conditions within the limit of their shear strength under high pressure. Owing to its low shear strength, solid helium would be the best choice for a pressure-transmitting medium to at least 100 GPa. However, helium is so compressible that care should be taken on minimizing irregular deformation of a gasket hole, which often causes complicated stress states. A review is given on the quasi-hydrostatic limits of solidified pressure-transmitting media, and some ways to reduce nonhydrostaticity are discussed including the case of low-temperature experiments.
{"title":"Hydrostaticity in high pressure experiments: some general observations and guidelines for high pressure experimenters","authors":"K. Takemura","doi":"10.1080/08957959.2021.1903457","DOIUrl":"https://doi.org/10.1080/08957959.2021.1903457","url":null,"abstract":"ABSTRACT The characteristics of hydrostatic stress conditions are discussed and compared with real experimental observations made under high pressure with a diamond-anvil cell. While fluid pressure-transmitting media give a well-defined single stress condition, solid pressure-transmitting media give a variety of stress conditions within the limit of their shear strength under high pressure. Owing to its low shear strength, solid helium would be the best choice for a pressure-transmitting medium to at least 100 GPa. However, helium is so compressible that care should be taken on minimizing irregular deformation of a gasket hole, which often causes complicated stress states. A review is given on the quasi-hydrostatic limits of solidified pressure-transmitting media, and some ways to reduce nonhydrostaticity are discussed including the case of low-temperature experiments.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"155 - 174"},"PeriodicalIF":2.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1903457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44784275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-24DOI: 10.1080/08957959.2021.1903458
C. İşlek, E. Koç, Ergin Murat Altuner, H. Alpas
ABSTRACT In this study, the effects of immobilization and high hydrostatic pressure (HHP) on capsaicin production in cell suspension culture of pepper seeds at different application times were investigated. Callus cultures were obtained from in vitro germinated hypocotyl explants of pepper seedlings and cell suspensions were prepared from calluses. Immobilized cell suspension cultures with calcium alginate and free cell suspension cultures were obtained by using these cell suspensions. 50, 100, 200, 300 and 400 MPa were applied to both free and immobilized cell suspensions as an elicitor. When all the results were compared, the highest amount of capsaicin was achieved in immobilized cell suspensions on the tenth day as 293.187 µg/g f.w at 400 MPa pressure. As a result, it can be concluded that the combined application of immobilization and elicitor (HHP) caused significant increases (p < .05) in the amount of capsaicin.
{"title":"Using high hydrostatic pressure as an abiotic elicitor strategy for improving capsaicin production in free and immobilized cell suspension cultures of Capsicum annuum L.","authors":"C. İşlek, E. Koç, Ergin Murat Altuner, H. Alpas","doi":"10.1080/08957959.2021.1903458","DOIUrl":"https://doi.org/10.1080/08957959.2021.1903458","url":null,"abstract":"ABSTRACT In this study, the effects of immobilization and high hydrostatic pressure (HHP) on capsaicin production in cell suspension culture of pepper seeds at different application times were investigated. Callus cultures were obtained from in vitro germinated hypocotyl explants of pepper seedlings and cell suspensions were prepared from calluses. Immobilized cell suspension cultures with calcium alginate and free cell suspension cultures were obtained by using these cell suspensions. 50, 100, 200, 300 and 400 MPa were applied to both free and immobilized cell suspensions as an elicitor. When all the results were compared, the highest amount of capsaicin was achieved in immobilized cell suspensions on the tenth day as 293.187 µg/g f.w at 400 MPa pressure. As a result, it can be concluded that the combined application of immobilization and elicitor (HHP) caused significant increases (p < .05) in the amount of capsaicin.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"198 - 208"},"PeriodicalIF":2.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1903458","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47266640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Large-volume cubic presses are widely used in scientific research and industrial applications. However, their pressure capability is often limited to 6 GPa, which severely restricts their applications under extended pressures. In this work, we report a newly designed hybrid cell assembly for cubic presses by embedding six WC pressure-enhancing blocks into the pyrophyllite pressure-transmitting medium, leading to profoundly increased pressure efficiency (i.e. more than 40%), hence largely extended pressure conditions up to 8–9 GPa without sacrificing sample volume. Because of the optimized design, the expensive first-stage WC anvils are effectively protected, which makes the press routinely operated up to 8–9 GPa in avoiding damage of anvils. Through optimization of heating efficiency, temperature of the new assembly can reach above 2500°C. Using this high pressure cell, we have synthesized centimetre-sized polycrystalline cubic BN bulk sample by the direct transformation of hexagonal BN at 7.7 GPa and 2000°C. Successful implementation of large-volume cubic press up to 8–9 GPa and 2500°C would provide many opportunities for the synthesis of new materials on massive scale (e.g. novel superhard compounds) and for the study of materials at extended pressures.
{"title":"Operation of large-volume cubic press above 8 GPa and 2500°C with a centimeter-sized cell volume using an optimized hybrid assembly","authors":"Guozhu Song, Dejiang Ma, Xuefeng Zhou, Lingfei Wang, Zheng Wei, Chaoran Xu, Wendan Wang, Liping Wang, Yusheng Zhao, Shanmin Wang","doi":"10.1080/08957959.2021.1897983","DOIUrl":"https://doi.org/10.1080/08957959.2021.1897983","url":null,"abstract":"ABSTRACT Large-volume cubic presses are widely used in scientific research and industrial applications. However, their pressure capability is often limited to 6 GPa, which severely restricts their applications under extended pressures. In this work, we report a newly designed hybrid cell assembly for cubic presses by embedding six WC pressure-enhancing blocks into the pyrophyllite pressure-transmitting medium, leading to profoundly increased pressure efficiency (i.e. more than 40%), hence largely extended pressure conditions up to 8–9 GPa without sacrificing sample volume. Because of the optimized design, the expensive first-stage WC anvils are effectively protected, which makes the press routinely operated up to 8–9 GPa in avoiding damage of anvils. Through optimization of heating efficiency, temperature of the new assembly can reach above 2500°C. Using this high pressure cell, we have synthesized centimetre-sized polycrystalline cubic BN bulk sample by the direct transformation of hexagonal BN at 7.7 GPa and 2000°C. Successful implementation of large-volume cubic press up to 8–9 GPa and 2500°C would provide many opportunities for the synthesis of new materials on massive scale (e.g. novel superhard compounds) and for the study of materials at extended pressures.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"132 - 141"},"PeriodicalIF":2.0,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2021.1897983","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46344908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/08957959.2020.1863962
Qiwei Hu, Ji Chen, Leiming Fang, Xiping Chen, Lei Xie, L. Lei, Chaowen Xu, Guangai Sun, Bo Chen, D. He
ABSTRACT The solubility of NaCl in water is one of the most important thermo-physical properties. However, the solubility behavior of NaCl in water is poorly understood at high pressure and low temperature. Herein, we performed high pressure neutron diffraction and Raman scattering to investigate the solubility of NaCl in water and the corresponding structural change, respectively. With the pressure increasing, the solubility almost increases linearly below 0.2 GPa, beyond which it starts to level off and reaches its maximum at about 0.61 GPa. The Raman spectra suggested that the deformation of the hydrogen-bonded network in the NaCl aqueous solution promotes the formation of ions pairing and is responsible for the solubility increase of NaCl in water. Finally, we used a two-dimensional Mercedes-Benz model to descript the picture of solubility behavior of NaCl in water at high pressure.
{"title":"The solubility behavior of NaCl in water at high pressure studied by neutron diffraction and Raman scattering","authors":"Qiwei Hu, Ji Chen, Leiming Fang, Xiping Chen, Lei Xie, L. Lei, Chaowen Xu, Guangai Sun, Bo Chen, D. He","doi":"10.1080/08957959.2020.1863962","DOIUrl":"https://doi.org/10.1080/08957959.2020.1863962","url":null,"abstract":"ABSTRACT The solubility of NaCl in water is one of the most important thermo-physical properties. However, the solubility behavior of NaCl in water is poorly understood at high pressure and low temperature. Herein, we performed high pressure neutron diffraction and Raman scattering to investigate the solubility of NaCl in water and the corresponding structural change, respectively. With the pressure increasing, the solubility almost increases linearly below 0.2 GPa, beyond which it starts to level off and reaches its maximum at about 0.61 GPa. The Raman spectra suggested that the deformation of the hydrogen-bonded network in the NaCl aqueous solution promotes the formation of ions pairing and is responsible for the solubility increase of NaCl in water. Finally, we used a two-dimensional Mercedes-Benz model to descript the picture of solubility behavior of NaCl in water at high pressure.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"39 - 51"},"PeriodicalIF":2.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2020.1863962","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46552134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/08957959.2020.1867723
A. Sano‐Furukawa, S. Kakizawa, Chikara Shito, T. Hattori, S. Machida, J. Abe, K. Funakoshi, H. Kagi
ABSTRACT We applied Kawai-type multi-anvil assemblies (MA6-8) for time-of-flight neutron-diffraction experiments to achieve high-pressures and high-temperatures simultaneously. To achieve sufficient signal intensities, the angular access to the sample was enlarged using slits and tapers on the first-stage anvils. Using SiC-binder sintered diamond for the second-stage anvils that transmits neutrons, sufficient signal intensities were achieved at a high-pressure of ∼23.1 GPa. A high-temperature experiment was also conducted at 16.2 GPa and 973 K, validating the use of tungsten carbide for the second-stage anvils. The present study reveals the capability of the MA6-8 cells in neutron-diffraction experiments to attain pressures and temperatures beyond the limits of the conventional MA6-6 cells used in the high-pressure neutron diffractometer PLANET at the MLF, J-PARC.
{"title":"High-pressure and high-temperature neutron-diffraction experiments using Kawai-type multi-anvil assemblies","authors":"A. Sano‐Furukawa, S. Kakizawa, Chikara Shito, T. Hattori, S. Machida, J. Abe, K. Funakoshi, H. Kagi","doi":"10.1080/08957959.2020.1867723","DOIUrl":"https://doi.org/10.1080/08957959.2020.1867723","url":null,"abstract":"ABSTRACT We applied Kawai-type multi-anvil assemblies (MA6-8) for time-of-flight neutron-diffraction experiments to achieve high-pressures and high-temperatures simultaneously. To achieve sufficient signal intensities, the angular access to the sample was enlarged using slits and tapers on the first-stage anvils. Using SiC-binder sintered diamond for the second-stage anvils that transmits neutrons, sufficient signal intensities were achieved at a high-pressure of ∼23.1 GPa. A high-temperature experiment was also conducted at 16.2 GPa and 973 K, validating the use of tungsten carbide for the second-stage anvils. The present study reveals the capability of the MA6-8 cells in neutron-diffraction experiments to attain pressures and temperatures beyond the limits of the conventional MA6-6 cells used in the high-pressure neutron diffractometer PLANET at the MLF, J-PARC.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"41 1","pages":"65 - 74"},"PeriodicalIF":2.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/08957959.2020.1867723","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42179866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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