About Silicides

Tantalum Silicide

Silicides are binary compounds of silicon with other more electropositive elements. Chemical bonds in silicides may exhibit primarily covalent or primarily ionic characteristics, depending on the electronegativity of participating elements.

Silicides of many transition metals and all non-transition metals except beryllium have been described; mercury, thallium, bismuth, and lead are nonmiscible with liquid silicon. Transition metal silicides are usually inert to all aqueous solutions with the exception of hydrofluoric acid, but they can react with more aggressive agents such as potassium hydroxide or halogen gases when subjected to extremely high temperatures.

Silicides play important roles in the field of advanced technology. Thin films of metal silicides are integral to the integrated circuits of semiconductor and microelectronics devices, the most common including CoSi2, NiSi2, WSi2, MoSi2, TaSi2, TiSi2., and PtSi, a superconductor and Schottky barrier used in infrared detection and Schottky contacts. These materials are typically synthesized via sputtering deposition of the metal onto a high purity silicon wafer. Alkali metal silicides like sodium silicide generate pure hydrogen when reacted with water or water-based solutions, making them a potentially viableas a clean, sustainable source of hydrogen for fuel cells. Niobium silicide was used to create the first functional printed diode that worked up to the GHz range, and a novel lithium borosilicide (LiBSi2) has been investigated as a promising anode material for lithium-ion batteries that could increase cell capacity.

Recent Research & Development for Silicides

Ultrathin, Transferred Layers of Metal Silicide as Faradaic Electrical Interfaces and Biofluid Barriers for Flexible Bioelectronic Implants., Li, Jinghua, Li Rui, Du Haina, Zhong Yishan, Chen Yisong, Nan Kewang, Won Sang Min, Zhang Jize, Huang Yonggang, and Rogers John A. , ACS Nano, 2019 Jan 04, (2019)

On the Microstructure and Isothermal Oxidation of Silica and Alumina Scale Forming Si-23Fe-15Cr-15Ti-1Nb and Si-25Nb-5Al-5Cr-5Ti (at.%) Silicide Alloys., Hernández-Negrete, Ofelia, and Tsakiropoulos Panos , Materials (Basel), 2019 Apr 02, Volume 12, Issue 7, (2019)

A Study of the Effects of Al, Cr, Hf, and Ti Additions on the Microstructure and Oxidation of Nb-24Ti-18Si Silicide Based Alloys., Nelson, Jack, Ghadyani Mohammad, Utton Claire, and Tsakiropoulos Panos , Materials (Basel), 2018 Sep 01, Volume 11, Issue 9, (2018)

Chondroitin sulfate from sturgeon bone ameliorates pain of osteoarthritis induced by monosodium iodoacetate in rats., Sun, Yingjiao, Zhang Guozhuan, Liu Qian, Liu Xudong, Wang Lei, Wang Jianfeng, and Liang Lishuang , Int J Biol Macromol, 2018 Oct 01, Volume 117, p.95-101, (2018)

Magnetic Binary Silicide Nanostructures., Goldfarb, Ilan, Cesura Federico, and Dascalu Matan , Adv Mater, 2018 Oct, Volume 30, Issue 41, p.e1800004, (2018)

Fabrication and Thermoelectric Characterization of Transition Metal Silicide-Based Composite Thermocouples., Yakaboylu, Gunes A., Pillai Rajalekshmi C., Sabolsky Katarzyna, and Sabolsky Edward M. , Sensors (Basel), 2018 Nov 03, Volume 18, Issue 11, (2018)

Thermoelectric Properties of Bi-Doped Magnesium Silicide Stannides., Macario, Leilane Roberta, Cheng Xiaoyu, Ramirez Daniel, Mori Takao, and Kleinke Holger , ACS Appl Mater Interfaces, 2018 Nov 02, (2018)

On Nb Silicide Based Alloys: Alloy Design and Selection., Tsakiropoulos, Panos , Materials (Basel), 2018 May 18, Volume 11, Issue 5, (2018)

Alloying and Properties of C14-NbCr₂ and A15-Nb₃X (X = Al, Ge, Si, Sn) in Nb-Silicide-Based Alloys., Tsakiropoulos, Panos , Materials (Basel), 2018 Mar 07, Volume 11, Issue 3, (2018)

Type of Primary Nb₅Si₃ and Precipitation of Nb in αNb₅Si₃ in a Nb-8.3Ti-21.1Si-5.4Mo-4W-0.7Hf (at.%) Near Eutectic Nb-Silicide-Based Alloy., McCaughey, Conor, and Tsakiropoulos Panos , Materials (Basel), 2018 Jun 07, Volume 11, Issue 6, (2018)

Electronic contribution in heat transfer at metal-semiconductor and metal silicide-semiconductor interfaces., Hamaoui, Georges, Horny Nicolas, Hua Zilong, Zhu Tianqi, Robillard Jean-François, Fleming Austin, Ban Heng, and Chirtoc Mihai , Sci Rep, 2018 Jul 27, Volume 8, Issue 1, p.11352, (2018)

Lithium Silicide Surface Enrichment: A Solution to Lithium Metal Battery., Tang, Wei, Yin Xuesong, Kang Sujin, Chen Zhongxin, Tian Bingbing, Teo Siew Lang, Wang Xiaowei, Chi Xiao, Loh Kian Ping, Lee Hyun-Wook, et al. , Adv Mater, 2018 Jul 05, p.e1801745, (2018)

Surface morphology of molybdenum silicide films upon low-energy ion beam sputtering., Gago, R, Jaafar M, and Palomares F J. , J Phys Condens Matter, 2018 Jul 04, Volume 30, Issue 26, p.264003, (2018)

On the Alloying and Properties of Tetragonal Nb₅Si₃ in Nb-Silicide Based Alloys., Tsakiropoulos, Panos , Materials (Basel), 2018 Jan 04, Volume 11, Issue 1, (2018)

Millimeter-Scale Growth of Single-Oriented Graphene on a Palladium Silicide Amorphous Film., Kim, Hyun-Woo, Song Inkyung, Kim Tae-Hoon, Ahn Sung Joon, Shin Ha-Chul, An Byeong-Seon, Jang Yamujin, Jeon Sunam, Kim Eun Hye, Khadka Ishwor Bahadur, et al. , ACS Nano, 2018 Dec 28, (2018)