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Vogel S, Buda AT, Schnick W. United in Nitride: The Highly Condensed Boron Phosphorus Nitride BP
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6. Angew Chem Int Ed Engl 2018; 57:13202-13205. [DOI: 10.1002/anie.201808111] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Sebastian Vogel
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Amalina T. Buda
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Wolfgang Schnick
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
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Vogel S, Buda AT, Schnick W. United in Nitride: The Highly Condensed Boron Phosphorus Nitride BP
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6. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808111] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sebastian Vogel
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Amalina T. Buda
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
| | - Wolfgang Schnick
- Department of ChemistryUniversity of Munich (LMU) Butenandtstraße 5–13 81377 Munich Germany
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Singh P, Harbola MK, Johnson DD. Better band gaps for wide-gap semiconductors from a locally corrected exchange-correlation potential that nearly eliminates self-interaction errors. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:424001. [PMID: 28766508 DOI: 10.1088/1361-648x/aa837b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This work constitutes a comprehensive and improved account of electronic-structure and mechanical properties of silicon-nitride ([Formula: see text] [Formula: see text]) polymorphs via van Leeuwen and Baerends (LB) exchange-corrected local density approximation (LDA) that enforces the exact exchange potential asymptotic behavior. The calculated lattice constant, bulk modulus, and electronic band structure of [Formula: see text] [Formula: see text] polymorphs are in good agreement with experimental results. We also show that, for a single electron in a hydrogen atom, spherical well, or harmonic oscillator, the LB-corrected LDA reduces the (self-interaction) error to exact total energy to ∼10%, a factor of three to four lower than standard LDA, due to a dramatically improved representation of the exchange-potential.
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Affiliation(s)
- Prashant Singh
- Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, United States of America
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Sardar K, Bounds R, Carravetta M, Cutts G, Hargreaves JSJ, Hector AL, Hriljac JA, Levason W, Wilson F. Sol-gel preparation of low oxygen content, high surface area silicon nitride and imidonitride materials. Dalton Trans 2016; 45:5765-74. [PMID: 26931152 DOI: 10.1039/c5dt04961j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of Si(NHMe)4 with ammonia are effectively catalysed by small ammonium triflate concentrations, and can be used to produce free-standing silicon imide gels. Firing at various temperatures produces amorphous or partially crystallised silicon imidonitride/nitride samples with high surface areas and low oxygen contents. The crystalline phase is entirely α-Si3N4 and structural similarities are observed between the amorphous and crystallised materials.
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Xiong L, Dai J, Song Y, Wen G, Qin C. Investigation of photoelectrical properties of α-Si3N4 nanobelts with surface modifications using first-principles calculations. Phys Chem Chem Phys 2016; 18:15686-96. [DOI: 10.1039/c6cp02020h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoelectrical properties of α-Si3N4 nanobelts with surface H, F and Cl modifications are investigated using first-principles methods.
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Affiliation(s)
- Li Xiong
- School of Material Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- China
| | - Jianhong Dai
- School of Material Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- China
| | - Yan Song
- School of Material Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- China
| | - Guangwu Wen
- School of Material Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- China
- School of Material Science and Engineering
| | - Chunlin Qin
- School of Material Science and Engineering
- Harbin Institute of Technology at Weihai
- Weihai 264209
- China
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Xiong L, Dai J, Zhong B, Wen G, Song Y. Orientation- and passivation-dependent stability and electronic properties of α-Si3N4nanobelts. Phys Chem Chem Phys 2014; 16:24266-74. [DOI: 10.1039/c4cp03378g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lee MR, Russell SS, Arden JW, Pillinger CT. Nierite (Si3N4), a new mineral from ordinary and enstatite chondrites. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/j.1945-5100.1995.tb01142.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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O'reilly K, Redington M, Hampshire S, Leigh M. Parameters Affecting Pressureless Sintering of α'-Sialons with Lanthanide Modifying Cations. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-287-393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTμ-silicon nitride forms a range of solid solution Mx(Si,Al)12(0,N)16 where x = 2 and M is Li+, Ca2+, y3+ or certain lanthanide cations. This paper reports the formation of Ln-α'-sialons by the reaction of Si3N4 with AIN and Ln2O3 where Ln=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y. Transformation reactions of Nd, Sm, Gd, Ho, Er and Y cations occurring during liquid phase pressureless sintering are reported. The effects of the volume and viscosity of the liquid phase and the amountof secondary N-melilite on sintering are discussed.
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Nooruddin NS, Wahlbeck PG, Robert Carper W. Molecular modeling of ionic liquid tribology: Semi-empirical bonding and molecular structure. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.theochem.2007.07.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yashima M, Ando Y, Tabira Y. Crystal Structure and Electron Density of α-Silicon Nitride: Experimental and Theoretical Evidence for the Covalent Bonding and Charge Transfer. J Phys Chem B 2007; 111:3609-13. [PMID: 17388537 DOI: 10.1021/jp0678507] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Crystal structure and electron-density distribution of alpha-silicon nitride (alpha-Si3N4, space group: P31c) have been investigated by a combined technique of the Rietveld method, the maximum-entropy method (MEM), and MEM-based pattern-fitting of high-resolution synchrotron powder diffraction data. In combination with density functional theory calculations, the present experimental electron-density distribution of the alpha-Si3N4 indicates covalent bonds between Si and N atoms and charge transfer from the Si to N atom. The triangular distribution around the N atoms, which is attributable to the nitrogen sp2 hybridization for the nearest silicon and nitrogen pairs, was found in both experimental and theoretical electron density distributions. The minimum electron density in an intralayer Si-N bond was a little lower than that in an interlayer bond, which would be responsible for the inequality between elastic constants, C33 > C11. The present work suggests that the high bulk modulus of the alpha-Si3N4 is attributable to the high minimum electron density of the Si-N bond.
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Affiliation(s)
- Masatomo Yashima
- Department of Materials Science and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama-shi, Kanagawa, 226-8502, Japan.
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Affiliation(s)
- J. Robertson
- a Central Electricity Research Laboratories , Leatherhead , Surrey , KT22 7SE , England
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Chapter 166 Ternary and higher order nitride materials. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0168-1273(98)25005-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Wang Q, Yan Y, Wang R. Convergent-Beam Electron diffraction study of structure of β-Silicon Nitride. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/pssa.2211550202] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Vashishta P, Kalia RK, Ebbsjö I. Low-energy floppy modes in high-temperature ceramics. PHYSICAL REVIEW LETTERS 1995; 75:858-861. [PMID: 10060136 DOI: 10.1103/physrevlett.75.858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Xu YN, Ching WY. Electronic structure and optical properties of alpha and beta phases of silicon nitride, silicon oxynitride, and with comparison to silicon dioxide. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:17379-17389. [PMID: 9978764 DOI: 10.1103/physrevb.51.17379] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Raman S, Jurney ET, Starner JW, Kuronen A, Keinonen J, Nordlund K, Millener DJ. Lifetimes in 15N from gamma-ray line shapes produced in the 2H(14N,p gamma ) and 14N(thermal n, gamma ) reactions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 50:682-697. [PMID: 9969708 DOI: 10.1103/physrevc.50.682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schultz PA, Messmer RP. Valence-bond theory of off-center impurities in silicon: Substitutional nitrogen. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:2532-2553. [PMID: 9939948 DOI: 10.1103/physrevb.34.2532] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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