Preparation of Zirconia Whiskers from Zirconium Hydroxide in Sulfuric Acid Solutions under Hydrothermal Conditions at 200°C
Mixtures of Zr(OH)4 and ZrO2 particles, ∼10 nm in size, were hydrothermally treated in 0.25–1.5 mol/L H2SO4 solutions at a temperature of 200°C. After 3 h, very short ZrO2 fibers, 10–30 nm in length, were obtained, with no other zirconium compounds observed. The particles grew with treatment time an...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2001-11, Vol.84 (11), p.2705-2706 |
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| container_title | Journal of the American Ceramic Society |
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| creator | Murase, Yoshio Kato, Etsuro |
| description | Mixtures of Zr(OH)4 and ZrO2 particles, ∼10 nm in size, were hydrothermally treated in 0.25–1.5 mol/L H2SO4 solutions at a temperature of 200°C. After 3 h, very short ZrO2 fibers, 10–30 nm in length, were obtained, with no other zirconium compounds observed. The particles grew with treatment time and resulted in whisker particles. In a higher concentration (3 mol/L) H2SO4 solution, ZrO2 whiskers were not obtained, and clear solutions resulted with the starting ZrO2 particles remaining. It was concluded that Zr(OH)4 was useful as a starting material and that nanosized ZrO2 particles served as seed crystals for whisker formation. |
| doi_str_mv | 10.1111/j.1151-2916.2001.tb01076.x |
| format | Article |
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After 3 h, very short ZrO2 fibers, 10–30 nm in length, were obtained, with no other zirconium compounds observed. The particles grew with treatment time and resulted in whisker particles. In a higher concentration (3 mol/L) H2SO4 solution, ZrO2 whiskers were not obtained, and clear solutions resulted with the starting ZrO2 particles remaining. 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After 3 h, very short ZrO2 fibers, 10–30 nm in length, were obtained, with no other zirconium compounds observed. The particles grew with treatment time and resulted in whisker particles. In a higher concentration (3 mol/L) H2SO4 solution, ZrO2 whiskers were not obtained, and clear solutions resulted with the starting ZrO2 particles remaining. It was concluded that Zr(OH)4 was useful as a starting material and that nanosized ZrO2 particles served as seed crystals for whisker formation.</abstract><cop>Westerville, Ohio</cop><pub>American Ceramics Society</pub><doi>10.1111/j.1151-2916.2001.tb01076.x</doi><tpages>2</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals【Remote access available】 |
| subjects | Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Nanoscale materials and structures: fabrication and characterization Physics seeding Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) thermal treatment whiskers Whiskers and dendrites (growth, structure, and nonelectronic properties) |
| title | Preparation of Zirconia Whiskers from Zirconium Hydroxide in Sulfuric Acid Solutions under Hydrothermal Conditions at 200°C |
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