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The Synthesis and Properties of ZrO_2 Nanometer Powders Obtained From Alkoxides by Sol-Gel Method

Chun Wang

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Abstract

ZrO2 nanometer powders were synthesized from self-made alkoxide by sol-gel method.Properties and structure of obtained powders were systematically investigated with TG-DTA. XRD and TEM.The results showed that the morphologies of the composite powders changed from twigged and granular mixtures to granualr to dumbbell.structures. stable temperature of nanometer is up to 1200℃, above this temerature the powder sintered. The powders' crystal structure was amorphous below 300℃. Tetragonal phase maintained after sintered at 500℃, and the phase disappeared completely after sintering temperature over 800℃.

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What this paper is about

ZrO2 nanometer powders were synthesized from self-made alkoxide by sol-gel method.Properties and structure of obtained powders were systematically investigated with TG-DTA. XRD and TEM.The results showed that the morphologies of the composite powders changed from twigged and granular mixtures to granualr to dumbbell.structures. stable temperature of nanometer is up to 1200℃, above this temerature the powder sintered. The powders' crystal structure was amorphous below 300℃. Tetragonal phase maintained after sintered at 500℃, and the phase disappeared completely after sintering temperature over 800℃.

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Available abstract

ZrO2 nanometer powders were synthesized from self-made alkoxide by sol-gel method.Properties and structure of obtained powders were systematically investigated with TG-DTA. XRD and TEM.The results showed that the morphologies of the composite powders changed from twigged and granular mixtures to granualr to dumbbell.structures. stable temperature of nanometer is up to 1200℃, above this temerature the powder sintered. The powders' crystal structure was amorphous below 300℃. Tetragonal phase maintained after sintered at 500℃, and the phase disappeared completely after sintering temperature over 800℃.

Key concepts: Nanometre, Materials science, Tetragonal crystal system, Sintering, Alkoxide, Amorphous solid, Sol-gel, Phase (matter)

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