Nickel disilicide

Crystal structure
__ Ni      __ Si
General
Surname	Nickel disilicide
Ratio formula	NiSi 2
Brief description	gray-blue solid
External identifiers / databases
CAS number 12201-89-7 EC number 235-379-3 ECHA InfoCard 100.032.151 Wikidata Q18211996
properties
Molar mass	114.86 g mol −1
Physical state	firmly
density	4.83 g cm −3
Melting point	1200 ° C
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 350i-372-317-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel disilicide is an inorganic chemical compound of nickel from the group of silicides .

Extraction and presentation

Nickel disilicide can be obtained by reacting nickel with silicon at 750 ° C.

${\displaystyle \mathrm {Ni+2\ Si\longrightarrow NiSi_{2}} }$

properties

Nickel disilicide is a gray-blue solid. It is a semiconductor and has a crystal structure of the fluorite type with the space group Fm 3 m (space group No. 225) . The connection has a resistance of about 34 to 50  µΩ / cm.

use

HAADF image of the interface between silicon (bottom) and epitaxial nickel disilicide (top).

Nickel disilicide is used as a contact material in the semiconductor industry. The lattice spacing of the connection is only 0.4% smaller than that of silicon.

Related links

In addition to nickel disilicide, at least five other nickel silicides stable at room temperature are known: Ni ₃ Si, Ni ₃₁ Si ₁₂ , Ni ₃ Si ₂ , NiSi and dinickel silicide (Ni ₂ Si). The phase diagram shows a total of eleven nickel silicides.

Individual evidence

1. ↑ ^{a b} scielo.org.za: Aspects of colored precious metal intermetallic compounds ( Memento of the original from July 7, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed July 7, 2016 
2. ^ ^{A b} Open Publications of UTS Scholars, Supansomboon, S: Properties and applications of metastable precious metal intermetallic compounds , accessed July 7, 2016
3. ↑ ^{a b} Entry on nickel disilicide in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
4. ^ ^{A b} Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 , pp. 13 ( limited preview in Google Book search).
5. ↑ BA Julie, D. Knoesen, R. Pretorius, D. Adams: A study of the NiSi to NiSi2 transition in the NiSi binary system. In: Thin Solid Films. 347, 1999, p. 201, doi : 10.1016 / S0040-6090 (99) 00004-8 .
6. ↑ Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 978-0-412-30120-9 , pp. 3669 ( limited preview in Google Book Search).
7. ^ ^{A b} Yoshio Nishi, Robert Doering: Handbook of Semiconductor Manufacturing Technology, Second Edition . CRC Press, 2007, ISBN 978-1-4200-1766-3 , pp. 18 ( limited preview in Google Book search).
8. ^ Johann-Friedrich Luy, Peter Russer: Silicon-Based Millimeter-Wave Devices . Springer Science & Business Media, 2013, ISBN 978-3-642-79031-7 , pp. 74 ( limited preview in Google Book search).
9. ^ Inder P. Batra: Metallization and Metal-Semiconductor Interfaces . Springer Science & Business Media, 2012, ISBN 978-1-4613-0795-2 , pp. 216 ( limited preview in Google Book search).
10. ^ William M. Haynes: CRC Handbook of Chemistry and Physics, 94th Edition . CRC Press, 2016, ISBN 978-1-4665-7115-0 , pp. 77 ( limited preview in Google Book search).