AZOTKU BORU - (10043-11-5)

Wprowadzenie

Nazwa: boron nitride
* IUPAC
Numer CAS: 10043-11-5
Wzór chemiczny: BN
Masa cząsteczkowa: 24.8177 g
Procent Mass: B 43.561 %; N 56.438 % 

Klasyfikacja

Zastosowania / Funkcja

• "...BN behaves very much like carbon, even to the extent of having a phase diagram almost identical to [carbon]...g-BN is white, an electrical insulator...
Finally, a report that pure BN nanotubes are formed in an electric discharge between a BN-packed tungsten electrode and a cooled copper electrode extends the list of formal similarities between BN and carbon, and implies that much interesting BN chemistry remains to be discovered." 1

• "Manuf[acture] of alloys; in semiconductors, nuclear reactors, lubricants." 2

Właściwości fizyczne

Temperatura topnienia:*
2966°C 3 = 3239.15 K = 5370.8°F

Gęstość (g/cm3):
2.18 at 25°C 3
* - 1 atm pressure

Rozpuszczalność

Jakościowy:
nierozpuszczalny:  3
rozpuszczalny:  • • • 3

klejenie

klejenie: polar covalent
Ionic Character: 30.30 %

Termochemia

ΔHf° (s): -60.8 kcal/mol 4 = -254.39 kJ/mol
ΔHf° (g): 154.75 kcal/mol 4 = 647.47 kJ/mol
S° (s): 3.54 cal/(mol•K) 5 = 14.81 J/(mol•K)
S° (g): 50.71 cal/(mol•K) 5 = 212.17 J/(mol•K)
ΔGf° (s): -54.6 kcal/mol 6 = -228.45 kJ/mol
ΔGf° (g): 146.87 kcal/mol 6 = 614.50 kJ/mol

Po więcej informacji

źródła

(1) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; pp 58-59.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 1336.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4-47.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:11.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:11.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:11.