Download PDF by Peter Eigen, Hannelore Keller-Rudek, Wolfgang Kurtz, Peter: Si Silicon: System Si-N. Binary and Ternary Silicon

By Peter Eigen, Hannelore Keller-Rudek, Wolfgang Kurtz, Peter Merlet, Hans Schäfer, Friedrich Schröder (auth.), Hartmut Katscher, Hannelore Keller-Rudek, Peter Merlet, Hans Schäfer, Friedrich Schröder, Hermann Jehn (eds.)

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Extra resources for Si Silicon: System Si-N. Binary and Ternary Silicon Nitrides. Silicon-Nitrogen-Hydrogen Compounds. N-Substituted Silicon-Nitrogen Compounds

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SiaN? (Si3 N)n. The substance has been prepared by heating amounts of up to 10 to 20 g CaSi 2 intimately mixed with twice the theoretical amount of NH4Br to 550°C (1 to 2 h) until the sublimation of unreacted NH4Br ceases. The reaction proceeds according to 3CaSi 2+ 6NH4Br-+2Ix(SiaN)n+3CaBr2+4NHa+6H2. The reaction begins at the sublimation temperature of NH 4Br and proceeds quickly; the reaction mixture swells up, the metallic character disappears, and a brown powder is formed. The following reaction steps are assumed: 6NH4Br -+ 6NHa + 6HBr; 3CaSi 2 + 6HBr -+ 3CaBr2 + 6/x(SiH)n; 6/x(SiH)n + 2NHa -+ 6H 2 + 2Ix(SiaN)n.

95 [1981] No. 211376). [9] Akebono Brake Kogyo K. K. (Japan. Kokai Tokkyo Koho 81-160424 [1980/81] from C. A. 96 [1982] No. 218945). , Ltd. (Japan. A. 97 [1982] No. 153792). [11] Saks, N. S. S. Appl. A. 99 [1983] No. 31861). [12] Hemment, P. L. F. (Proc. SPIE Intern. Soc. Opt. Eng. No. A. 102 [1985] No. 213457). [13] Jain, F. ; Rosato, J. ; Kalonia, K. ; Agarwala, V. S. (Polym. Mater. Sci. Eng. A. 106 [1987] No. 222862). [14] Yamamura, A. (Japan. A. 106 [1987] No. 161018). 2 Si 2 N, Si 2 N+ Disilicon Nitride Si 2 N.

So. -(Go- He)fT (in J. mol- 1. K-1) and W - He (in kJ/mol) are [53]: Tin K ........ Cop ........... So ........... -(Go-He)fT ... HO-He ....... 82 The internal partition function is also tabulated [53]. The function -(Go-H2sS)fT was expanded in a power series and the JANAF data [51] were used to evaluate the coefficients [57]. *) The values of [51] have been converted to kJ/mol or J. mol- 1. 1 MPa in [87]. Gmelin Handbook Si Suppl. Vol. B 4 SiN 21 Spectroscopic data from [58] were used to give polynomial expansions of log 0 (0 = partition function) for the temperature range T =1 000 to 5000 K [88] and polynomial expansions for log 0 and log Kp (SiN::;=:Si + N) for the temperature range T =1000 to 9000 K [59].

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