NITRIDES synthesis

Fig. 13 69Ga MAS-NMR spectra of GaN nanopowders labeled by sample codes. Left Knight shift resulting from thermal annealing. Right three different samples produced by GaAs nitridation synthesis containing c-GaN (357 ppm) as well as h-GaN (326 ppm). The broad peak at 470 ppm is assigned to Knight shifts in c-GaN. Reprinted with permission from [234], Copyright 2008 by the American Chemical Society...

Table 8.1 Reactions commonly used in ternary nitride synthesis...

Metal migrations, around rings, dynamic NMR studies, 1, 411 Metal nitrides, synthesis, 12, 53... 

The first stage of nitride synthesis from its constituents is the dissolution of nitrogen in liquid metal. This process was analysed [9,10] by ab initio quantum mechanical calculations using the density functional theory (DFT) approximation [11-13],... 

Tetrakis[iodo(tri- t-butylphosphine)copper(I)] and iodo(2,2 -bipyridine)(tri- -butylphosphine) copper (I), synthesis 3 Gallium(III) nitride, synthesis 5... 

Nitride synthesis is a very well known reaction in materials science which has b n solved satisfactorily in most cases with classical methods. Generally one applies the chemical vapor deposition or works with powders reacting at high temperature (T 1500 °K) in nitrogen or ammonia. Unfortunately the reaction times are very... 

Matsumoto published in 1969 a review of his work on nitrides synthesis. In the present paper we have summarized in table form (Table 15) the main experimental results that have been obtained up to now in this field. 

F. Richter, R. Pintaske, J. Hahn, and Th. Welzel, in Hard Coatings Based on Borides, Carbides and Nitrides Synthesis Characterization and Applications, A. Kumar, Y.-W. Chang, and R. W. J. Chia (Eds), The Minerals, Metals and Materials Society, Warrendale, PA, 1998, pp. 153-168. 

A. A. Shulzhenko, S. A. Bozhko, A. N. Sokolov, A. Petrusha, N. P. Bezhenar, A. I. Ignatusha, Cubic Boron Nitride Synthesis, Sintering and Properties, The Ukrainian Academy of Sciences, Institute for Superhard Materials, Kiev Naukova Dumka, 1993, 254. 

The invention of cubic boron nitride (CBN) is closely linked to the synthesis of artificial diamond. Cubic boron nitride synthesis was conducted first in 1957. CBN crystals are produced from boron and nitrogen at high pressures of 50-90 kbar, high temperatures between 1,800 °C and 2,700 °C, and in the presence of a catalyst (Klocke 2009). During the first years on the market, CBN was seen as a competitor to diamond. However, CBN proved to be a better material for machining of hard-to-machine ferrous materials than diamond due to the missing chemical affinity and the higher thermal stability. 

Lin DC, Kimura S (1996) Kinetics of silicon monoxide ammonolysis for nanophase silicon nitride synthesis. J Am Ceram Soc 79 2947-2955... 

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