8589356371

L Kozhitov. A. Kostikova. V. Kozlov. Zh. Myrkhalykov, A. Saipov.

FEA TURES OF FeNi3 NANOPARTICLES IN POL YACRYLONITRILE FORMA TION UNDERINFRARED HEA TING

The XP A spectra of composites FeCl₃*6H₂0/NiCl2*6H₂0/PAN with C_Fc and Cn, concentrations from 5 to 20 mass % prepared by the IR-heating at 500 and 700 °C are obtained (Fig. 3). In the XPA spectra of samples the halo at 20 - 4-r30° confirming the formation of amorphous C from PAN under the destruction

as a result of the IR-heating is observed. Peaks at 26 ~ 45, 52 and 76° corresponding to the FeNij crystalline inter-metallide formation are defined. As far as Cm_c increases from 5 to 20 mass %, the average size of FeNi₃ nanoparticles in nanocomposites increases from 20 to 60 nm (Table 2).

O.f

FeXi.(l 11)

F eXi.(200)

FeXi.(220)

“I-'-I---1-1-1-

8

1* 2^C 22    *0    *8    i* 72    80

:e.'

Fig. 3 - XPA spectrum of FeNi₃/C nanocomposite with initial C_Fc and C_Nl equal to 20 mass % after IR-

heating at 500°C

The phase diagram of a Fe-Ni system confirms the possibility of FcNi₃ obtaining at Iow temperaturę [14]. Crystalline FeNi₃ formation is determined by SEM (Fig. 4). FeNi₃

nanoparticles are distributed in the carbon materiał obtained from the polymer. In this case, the carbon materiał has the porous surface obtained by the polymer destruction and volatile Products emission under IR-heating (Fig. 4).

Table 2 - X-ray data of FeNij/C composites obtained under the IR-heating

X2	cFe, mass %	CN„ mass %	T °C	Particie composition	Average particie size, nm
1	20	20	500 700	FeNi3 FeNi3	53
					57
				FeNi,	20
			500		43
2	10	10		Fe
			700	FeNi3	40
			500	FeNi3	47
3	5	5	700	FeNi3	10

8

Journal of Industrial Technology and Engineering, 2012, 2(3): 5-10