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Combustion Synthesis And Properties Of Fine-particle Rare-earth-metal Zirconates, Ln2Zr2O7
| Content Provider | Indian Institute of Science (IISc) |
|---|---|
| Author | Dhas, Arul N. Patil, Kashinath C. |
| Copyright Year | 1993 |
| Abstract | Fine-particle rare-earth-metal zirconates, Ln2Zr2O7, where Ln = La, Ce, Pr, Nd, Sm, Gd and Dy having the pyrochlore structure have been prepared using a novel combustion process. The process employs aqueous solutions of the corresponding rare-earth-metal nitrate, zirconium nitrate and carbohydrazide urea in the required molar ratio. When the solution is rapidly heated to 350–500 ÀC it boils, foams and burns autocatalytically to yield voluminous oxides. The formation of single-phase Ln2Zr2O7 has been confirmed by powder X-ray diffraction, infrared and fluorescence spectroscopy. The solid combustion products are fine, having surface areas in the range 6–20 m2 g–1. The cold-pressed Pr2Zr2O7 compact when sintered at 1500 ÀC, 4 h in air, achieved 99% theoretical density. |
| File Format | |
| Journal | PeerReviewed |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 1993-12-01 |
| Access Restriction | Authorized |
| Subject Keyword | Inorganic & Physical Chemistry |
| Content Type | Text |
| Resource Type | Article |
