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Microwave Sintering of Nanocrystalline ZrO2 Powders

Published online by Cambridge University Press:  15 February 2011

Zhang Jinsong ,
Yang Yongjin ,
Cao Lihua ,
Chen Shengqi ,
Shong Xiaoping  and
Xia Fei
Zhang Jinsong
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
Yang Yongjin
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
Cao Lihua
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
Chen Shengqi
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
Shong Xiaoping
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
Xia Fei
Affiliation:
(Institute of Metal Research Academia Sinica, Shenyang 110015, China)
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Abstract

Nanociystalline Z1O2 powders, prepared by plasma-chemical method, were sintered by microwave heating. The experimental results indicated that the thermal runaway and hot spot are two important obstacles to successful microwave sintering of nanocrystalline ZrO2. By controlling ratio of dielectric loss between sintered ZrO2 compact and adjacent thermal insulator, the ZrO2 compact with diameter larger than 30 mm could be microwave-heated rapidly and uniformly from room temperature to 1600 °C in 80 minutes, the mean grain size of ZrCh ( 96% T.D. sintered at 1500°C for 5 minutes) is lower than 20 nm determined by means of quantitative XRD and TEM. The change of ZrO2 grain size may be related to phase transformation (t→m).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 347: Symposium O – Microwave Processing of Materials IV , 1994 , 591
Copyright
Copyright © Materials Research Society 1994

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References

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