scholarly journals HIGH-TEMPERATURE HIGH-PRESSURE SYNTHESIS OF PEROVSKITE-TYPE Pb(Zn1/3Nb2/3)O3

1978 ◽  
Vol 27 (2) ◽  
pp. 224
Author(s):  
ZHAO YU-LING ◽  
YAO YU-SHU ◽  
WANG WEN-KUI
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
Perovskite Type ◽  
High Temperature High Pressure

Homogeneous carbon doping of magnesium diboride by high-temperature, high-pressure synthesis

2014 ◽  
Vol 104 (16) ◽  
pp. 162603 ◽  
Author(s):  
M. A. Susner ◽  
S. D. Bohnenstiehl ◽  
S. A. Dregia ◽  
M. D. Sumption ◽  
Y. Yang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Magnesium Diboride ◽  
Carbon Doping ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
High Temperature High Pressure

High temperature-high pressure synthesis of a new phase of LaCuO3

1989 ◽  
Vol 137 (4-5) ◽  
pp. 205-206 ◽  
Author(s):  
A.W. Webb ◽  
E.F. Skelton ◽  
S.B. Qadri ◽  
E.R. Carpenter ◽  
M.S. Osofsky ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
New Phase ◽  
High Temperature High Pressure

High Temperature/High Pressure Synthesis and Crystal Structure of the New Corundum Related Compound Zn4Nb2O9.

ChemInform ◽  
2003 ◽  
Vol 34 (32) ◽  
Author(s):  
Nadezhda V. Tarakina ◽  
Alexander P. Tyutyunnik ◽  
Vladimir G. Zubkov ◽  
Tatjana V. D'yachkova ◽  
Yury G. Zainulin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Related Compound ◽  
Synthesis And Crystal Structure ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
High Temperature High Pressure

High Temperature—High Pressure Synthesis and Crystal Structure of the Incommensurately Modulated, α-PbO2 Related, Compound MnTa2O6.

ChemInform ◽  
2003 ◽  
Vol 34 (44) ◽  
Author(s):  
Nadezhda V. Tarakina ◽  
Alexander P. Tyutyunnik ◽  
Vladimir G. Zubkov ◽  
Tatjana V. D'Yachkova ◽  
Yury G. Zainulin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Related Compound ◽  
Synthesis And Crystal Structure ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
High Temperature High Pressure

High-temperature high pressure synthesis of monoclinic Y2O3

2019 ◽  
Vol 239 ◽  
pp. 82-85 ◽  
Author(s):  
Xinwei Li ◽  
Xianming Xia ◽  
Hualan Xu ◽  
Shengliang Zhong ◽  
Duanwei He
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
High Temperature High Pressure

scholarly journals High-pressure synthesis, structure, phase relation of polar LiNbO3-type ZnTiO3

2014 ◽  
Vol 70 (a1) ◽  
pp. C1348-C1348
Author(s):  
Yoshiyuki Inaguma ◽  
Akihisa Aimi ◽  
Yuichi Shirako ◽  
Daichi Sakurai ◽  
Daisuke Mori ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Spontaneous Polarization ◽  
Second Order ◽  
Type Structure ◽  
First Principles Calculation ◽  
Stable Phase ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
Perovskite Type

Ferroelectricity, piezoelectricity, pyroelectricity, and second-order nonlinear optical behavior are technologically important. Because these properties are attributable to the noncentrosymmetric (NCS) structure[1], the search for materials exhibiting such characteristics must begin with a search of NCS materials. Among them, LiNbO3-type (LN-type) compounds with a chemical formula of ABX3 exhibit NSC structures with hexagonal polar space group R3c whose BX6 octahedra three-dimensionally share their corners the same as perovskite-type compounds[2]. In LN-type compounds, the A cation - B cation repulsion directs the spontaneous polarization along c-axis(Fig. 1). Therefore, we might find attractive functional properties by the selection of constituent ions based on their having a naturally occurring polar LN-type structure attributable to the cation-cation repulsion. With the ideas mentioned above, we have investigated the high-pressure synthesis and characterization of novel LN-type oxides such as ZnSnO3, PbNiO3, CdPbO3 as well as known MnMO3 (M = Ti, Sn). Recently, we have successfully synthesized a polar LN-type titanate ZnTiO3 (LN-ZTO) under high pressure and high temperature [3]. The first principles calculation indicates that LN-ZTO is a meta-stable phase obtained by the transformation in the decompression process from the perovskite-type phase, which is stable at high pressure and high temperature. The Rietveld structural refinement reveals that LN-ZTO exhibits greater intra-distortion of the TiO6 in LN-ZTO than that of the SnO6 in LN-type ZnSnO3 (LN-ZSO). The estimated spontaneous polarization are greater than those of LN-ZSO, which is attributed to the great displacement of Ti along c-axis and the greater Born effective charge of Ti (+6.1) than that of Sn (+4.1). Furthermore, the spontaneous polarization of LN-ZTO is greater than that of LiNbO3, indicating that LN-ZTO, like LiNbO3, is a candidate ferroelectric material with high performance. The second harmonic generation (SHG) response of LN-ZTO is 24 times greater than that of LN-ZSO. The findings indicate that the intra-octahedral distortion, spontaneous polarization, and SHG response are caused by the stabilization of the polar LN-type structure and reinforced by the second-order Jahn-Teller effect attributable to the orbital interaction between oxygen ions and d0 ions such as Ti4+. We also discuss the relationship between the intra-distortion of BO6 and polarity in several LN-type oxides.

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