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

Abstract

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.

On the relations between the bandgap, structure and composition of the M–Si–N (M = alkali, alkaline earth or rare-earth metal) nitridosilicates

“…While the M-N bond lengths increase with increasing degree of condensation, the Si-N bond lengths tend to decrease with increasing degree of condensation, as has previously been observed by Schnick et al 12,84 This can also be observed from the data shown in Fig. 5a: the average Si-N distance is relatively large in for example Ca 4 SiN 4 (1.791 Å) with very low degree of condensation, while relatively small in SrSi 7 N 10 (1.731 Å) with a very high degree of condensation.…”

Nanosegregation and Neighbor‐Cation Control of Photoluminescence in Carbidonitridosilicate Phosphors

“…[1,7,9,10] Nitride-based materials are more covalent than oxides, which improves thermal stability, and their greater crystal field splitting increases the red emission leading to warmer white light. [1,2,11,12] The chemistry of doped nitride phosphors is often complex…”

Inorganic Phosphor Materials for Lighting

“…Although YAG and other garnet-type host lattices continue to be considered very promising materials, it should be noted that a variety of other classes of phosphors have been developed and are now attracting increased attention. Examples of such are silicates [189], nitrides [190][191][192], and oxy-nitrides [193,194], to name a few.…”