Cerium-based oxide fiber and its fabricating method
AssigneeNational Taiwan University
InventorsWen-Cheng Wei, Jia-Ming Sung, Sung-En Lin, Je-Yan Yu
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Abstract
This invention discloses a kind of cerium-based oxide fiber and its fabricating method. The cerium-based hydrate fiber can be synthesized by aging under the boiling point of water for 10 hours to 50 hours by the addition of a chemical modifier. The fibers show a diameter of submicron to micron size, and the aspect ratio is greater than 100. The hydrate fibers can transform to oxide fiber after calcination at high temperature.
Claims25
A cerium-based fiber, comprises a composition of (Ce1−x−y, M1w, M2x)O2−y−z(OH)2y(CO3), having a first trivalent cation (M1) with w mole (mol) %, a second trivalent cation (M2) with x mole (mol) %, a hydroxyl ion matter with y mole (mol) %, and a carbonate compound with z mole (mol) %, and said fiber is converted into an oxide and maintaining its fibrous form after going through a calcination.
A cerium-based fiber fabrication method, comprising the steps of:
- adding a modifier, cerium nitrate, sodium hydroxide, and metal (M1, M2) nitrate into an a solution according to a predetermined ratio (h) of sodium hydroxide to cerium nitrate and a predetermined ratio of M1, M2 to cerium nitrate;
- waiting till solutes of said solution are dissolved completely;
- placing said solution into a constant temperature machine for holding the temperature;
- and
- removing said solution and a produced precipitate in several hours after the reaction, and rinsing said precipitate several times by deionized water.
Dependencies are inferred from the claim text.