Preparation of Antistatic Ceramics Employing Fe-infiltration in Sintered Zirconia Body

doi:10.15541/jim20130690

Abstract

Abstract:

Antistatic ceramic with good mechanical performance has wide application in fields of aerospace, petrochemical engineering, electronics and textile. Antistatic ceramic ZrO₂was fabricated via an innovative surface modification method based on embedding Fe-infiltration into the 3Y-TZP ceramic at high temperature, which showed good antistatic and mechanical properties. In addition, microstructure and morphology of as-prepared samples were characterized by XRD, SEM and XPS. Furthermore, the antistatic mechanism of ZrO₂ ceramics was investigated. The effects of infiltration temperature and infiltration time on vickers hardness and surface resistivity of specimen were evaluated. Experimental results showed that the surface resistivity and hardness decreased with the increase of infiltration temperature and infiltration time, in which the surface resistivity decreased from more than 10¹⁴?/□ to 8.3×10⁷?/□, and the hardness of ZrO₂ ceramics decreased from 12.7 GPa to 11.23 GPa after infiltration at 1000℃ for 4 h. Analysis results indicated that there was a phase transformation of ZrO₂ from t-ZrO₂ to m-ZrO₂ in the infiltration process. It was also found that Fe, Fe₃O₄and FeO located in the interface of infiltration layer, which were attributed to the antistatic property of ZrO₂ ceramics.

Key words: zirconia ceramics, antistatic, surface resistivity, high-temperature infiltration

CLC Number:

TQ174

LI Yong, XU Xie-Wen, YANG Xian-Feng, XIE Zhi-Peng. Preparation of Antistatic Ceramics Employing Fe-infiltration in Sintered Zirconia Body[J]. Journal of Inorganic Materials, 2014, 29(10): 1099-1104.

Figures/Tables 10

Fig. 1 Effect of infiltration temperature (a) and infiltration time (b) on surface resistivity of 3Y-TZP ceramics

Fig. 2 Effect of infiltration temperature (a) and infiltration time (b) on toughness of 3Y-TZP ceramics

Fig. 3 XRD patterns of 3Y-TZP ceramic infiltrated at different temperatures for 4 h (a) and at 1000℃ for different time (b)

Fig. 4 SEM images of 3Y-TZP ceramics before (a) and after (b)infiltrating at 1000℃ for 4 h

Fig. 5 SEM images of antistatic 3Y-TZP ceramics and corresponding EDS analyses of marked areas

Fig. 6 XPS spectra of O, Zr and Y for 3Y-TZP ceramics before and after infiltrating at 1000℃ for 4 h

Fig. 7 XPS wide spectra of 3Y-TZP ceramic before and after infiltration

Fig. 8 XPS spectra of Fe2p

Fig. 9 XRD pattern of the iron layer coating on antistatic 3Y-TZP ceramics

Table 1 Peak position and relative area of Fe XPS spectra

Iron states	Peak position/eV				Area/%
Iron states	Fe2p_1/2	Satellite		Fe2p_3/2	Area/%
Fe	720.5	729.6	715.0	707.0	8.37
FeO	722.6			709.0	40.42
Fe₃O₄	724.0			710.6	51.21

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