Thermal Conductivity of M-Si-N (M = Mg, Ca, Sr, Ba) Compounds with Varying M/Si Ratio

Hintzen, Htjm Bert; Bruls, RJ Richard; Delsing, Aca Anneke; Itatani, Kiyoshi; Tanaka, Seiji; Metselaar, R Ruud

doi:10.4028/www.scientific.net/kem.206-213.973

Cited by 9 publications

(5 citation statements)

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“…Dabei ist zu erkennen, dass die Wär-meleitfähigkeit in Zusammenhang mit der Art der Raumnetzstruktur mit sinkendem M:Si-Verhältnis steigt. [165] 7.3. Lithium-Ionenleitung Mit Blick auf Anwendungen als effiziente Ionenleiter und Stickstoffsensoren werden seit einiger Zeit die Eigenschaften und die Synthese von Lithiumnitridosilicaten untersucht.…”

Section: Nitridkeramikenunclassified

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Zeuner¹,

Pagano²,

Schnick³

2011

Angewandte Chemie

102

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Silicate sind eine der wichtigsten Verbindungsklassen auf diesem Planeten, und mehr als 1000 Vertreter wurden im Mineralreich bereits identifiziert. Zusätzlich wurden auch mehrere hundert künstliche Silicate synthetisiert. Der Ersatz von Sauerstoff durch Stickstoff führt zur strukturell vielseitigen Klasse der Nitridosilicate. Siliciumnitrid, eines der wichtigsten nichtoxidischen keramischen Materialien, ist die binäre Stammverbindung der Nitridosilicate, und sie symbolisiert die inhärenten Materialeigenschaften dieser Verbindungen. Allerdings ist eine breite systematische Erforschung der Nitridosilicate erst in den letzten Dekaden erfolgt. Mittlerweile haben diese und verwandte Verbindungen ein bemerkenswertes Ausmaß an industrieller Anwendung erreicht. Dieser Aufsatz illustriert jüngste Fortschritte bei der Synthese, der Aufklärung von Struktur‐Eigenschafts‐Beziehungen und den Anwendungen von Nitridosilicaten, Oxonitridosilicaten und den verwandten SiAlONen.

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Section: Nitridkeramikenunclassified

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Zeuner¹,

Pagano²,

Schnick³

2011

Angewandte Chemie

102

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“…Although smaller values in the range of 3-6 W m À1 K À1 were measured for CaSiN 2 , BaSi 7 N 10 , and M 2 Si 5 N 8 with M = Ca, Sr, Ba, a trend of increasing thermal conductivity with decreasing M/Si ratio might suggest a relationship with the network connectivity. [165] …”

Section: Thermal Conductivitymentioning

confidence: 99%

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

2011

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Silicates are one of the most important classes of compounds on this planet, and more than 1000 silicates have been identified in the mineral kingdom. Additionally, several hundreds of artificial silicates have been synthesized. The substitution of oxygen by nitrogen leads to the structurally diverse and manifold class of nitridosilicates. Silicon nitride, one of the most important non-oxidic ceramic materials, is the binary parent compound of nitridosilicates, and it symbolizes the inherent material properties of these refractory compounds. However, prior to the last decades, a broad systematic investigation of nitridosilicates had not been accomplished. In the meantime, these and related compounds have reached a remarkable level of industrial application. This review illustrates recent progress in synthesis and structure-property relationships and also applications of nitridosilicates, oxonitridosilicates, and related SiAlONs.

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“…Several compounds are known in literature for the systems Ca–Si–N and Ca–Si–O–N [e.g., CaSiN 2 , Ca 2 Si 5 N 8 , HP‐Ca 2 Si 5 N 8 , Ca 4 SiN 4 , Ca 5 Si 2 N 6 , CaSi 2 O 2 N 2 ,, Ca 3 Si 2 O 4 N 2 and Ca 2 Si 3 N 4 O 2 , CaSi(O/N) 2 ]. The systems MSiN 2 (M = Mg, Ca, Sr, Ba) in general stand out due to their multifaceted application in industry as, for example, sinter additives for Si 3 N 4 ceramics or Eu 2+ ‐doped LED‐phosphors, …”

Section: Introductionmentioning

confidence: 99%

HP‐CaSiN₂ – A New High‐Pressure Modification

2018

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HP‐CaSiN2 was obtained by HP/HT (high pressure / high temperature) synthesis utilizing the multianvil technique (4.5 to 18 GPa, 900 to 1200 °C) starting from the ambient pressure phase CaSiN2. Structure solution and Rietveld refinement were started with the cell parameters of HP‐CaSiN2 determined by selected area electron diffraction (SAED). The crystal structure of the high‐pressure phase was refined in space group Pbca (no. 61) with a = 5.1296(2), b = 10.2993(2), c = 14.5442(3) Å, V = 768.39 Å3, Z = 16, RBragg = 0.0484, Rw = 0.0256 and GoF = 1.0. HP‐CaSiN2 is built up by a three‐dimensional nitridosilicate network of vertex‐sharing SiN4‐tetrahedra with N bridging. The arrangement of the vertex‐linked tetrahedra in HP‐CaSiN2, being isostructural with KGaO2, is a tilting distortion of the stuffed β‐cristobalite type framework. Due to the high pressure the tilting angle of the SiN4‐tetrahedra has become much smaller so that the latter appear edge‐sharing sharing which is only a consequence of the chosen view along [100]. The Ca ions are located within these sechser‐ring channels and are coordinated by 6 and 7 N‐atoms, respectively. HP‐CaSiN2 is similar to CaSiN2, but differs clearly in the rotation of the SiN4‐tetrahedra and in the conformation of the sechser‐rings. Because of their coexistence HP‐CaSiN2 and CaSiN2 represent a very good example of an isosymmetric polymorphism.

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Thermal Conductivity of M-Si-N (M = Mg, Ca, Sr, Ba) Compounds with Varying M/Si Ratio

Cited by 9 publications

References 0 publications

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

HP‐CaSiN₂ – A New High‐Pressure Modification

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Thermal Conductivity of M-Si-N (M = Mg, Ca, Sr, Ba) Compounds with Varying M/Si Ratio

Cited by 9 publications

References 0 publications

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Nitridosilicate und Oxonitridosilicate: von keramischen Materialien zu struktureller und funktioneller Diversität

Nitridosilicates and Oxonitridosilicates: From Ceramic Materials to Structural and Functional Diversity

HP‐CaSiN2 – A New High‐Pressure Modification

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Product

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About

HP‐CaSiN₂ – A New High‐Pressure Modification