Formation and stabilization of tetragonal phase in sol–gel derived ZrO2 treated with base-hot-water

Prastomo, Niki and Muto, Hiroyuki and Sakai, Mototsugu and Matsuda, Atsunori (2010) Formation and stabilization of tetragonal phase in sol–gel derived ZrO2 treated with base-hot-water. Materials Science and Engineering B, 173 (1-3). pp. 99-104. ISSN 2161-6221

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Abstract

Zirconia (ZrO2) nanoparticles have been prepared by sol–gel route. Low temperature crystallization using base-hot-water treatment (BHWT) was conducted for the sol–gel derived ZrO2 gel powders at 90 °C and at pH 14 for various periods of time. Single phase nanocrystalline tetragonal ZrO2 (t-ZrO2) was successfully obtained by immersing the dry gel powders into hot, basic condition water and kept at rest for given time. BHWT at pH 14 with sodium hydroxide (NaOH) medium by digestion for 12 h and then continuing with stirring for 12 h resulted in the formation of t-ZrO2 with surface area of 292 m2/g and crystal size of 7 nm. Study on base solution medium, using NaOH, shows that the sodium ions play an important role for the formation of t-ZrO2 by incorporating into the crystal structure during the treatment. BHWT also effectively removed organic groups of the sol–gel derived ZrO2 nanoparticles.

Item Type: Article
Uncontrolled Keywords: Zirconia; Base-hot-water treatment; Low temperature crystallization; Sol–gel derived nanoparticles
Subjects: 500 Science and Mathematic > 500 Science > 507 Education, Research, Related Topics
Divisions: Fakultas Teknik Informatika > Program Studi Teknik Fisika
Depositing User: mr admin umn
Date Deposited: 09 Dec 2021 16:47
Last Modified: 09 Dec 2021 16:47
URI: http://kc.umn.ac.id/id/eprint/19441

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