以NH4HCO3为沉淀剂通过共沉淀法制备2Y-TZP纳米粉体

Abstract

Abstract: 2Y-TZP nanopowder was prepared by a coprecipitation method, using NH₄HCO₃, ZrOCl₂·9H₂O and Y(NO₃)₃ as the starting materials. During the precipitating process, (NH₄)₃ZrOH(CO₃)₃·2H₂O
was formed through a two-step reaction. First, NH₄HCO₃reacted with ZrOCl₂·9H₂O to form Zr(OH)₄, then NH₄HCO₃ further reacted with Zr(OH)4 to form (NH₄)₃ZrOH(CO₃)₃·2H₂O.
The resulting (NH₄)₃ZrOH(CO₃)₃·2H₂O was unstable and decomposed into ZrO₂, NH₃, H₂O and CO₂ at about 130℃. The 2Y-TZP powders obtained by calcining the precipitate
mixture at 300℃ and 450℃ showed very fine particle sizes and were almost free of large hard aggregates. Furthermore, these powders showed good sinterability and could be highly
densified at a low temperature of 1225℃.

Key words: NH₄HCO₃, ZrO₂, （NH₄）₃ZrOH（C0₃）₃·2H₂O, sintering and nanopowder

CLC Number:

TF123

TANG Jiao-Ning,JIN Xi-Hai,GAO Lian. 以NH₄HCO₃为沉淀剂通过共沉淀法制备2Y-TZP纳米粉体[J]. Journal of Inorganic Materials.

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以NH₄HCO₃为沉淀剂通过共沉淀法制备2Y-TZP纳米粉体

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