Premium
High Reactive MgO‐Y 2 O 3 Nanopowders via Microwave Combustion Method and Sintering Behavior
Author(s) -
Sun Haibin,
Zhang Yujun,
Li Teng,
Gong Hongyu,
Li Qisong
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12484
Subject(s) - materials science , sintering , combustion , activation energy , relative density , economies of agglomeration , reactivity (psychology) , grain size , chemical engineering , microwave , analytical chemistry (journal) , metallurgy , nuclear chemistry , chemistry , organic chemistry , medicine , alternative medicine , physics , pathology , quantum mechanics , engineering
To decrease the sintering temperature of MgO‐Y 2 O 3 composites to avoid undesired grain coarsening, high reactive MgO‐Y 2 O 3 nanopowders were synthesized via microwave combustion method. The degree of combustion was enhanced effectively by adding an extra oxidant ammonium nitrate. The as‐synthesized MgO‐Y 2 O 3 nanopowders, ~18 nm in size, showed high specific surface area of 64.55 m 2 /g and low agglomeration. Relative density of 98% was obtained when sintered at a low sintering temperature of 1350°C. The high reactivity can be attributed to the lower activation energy Q (131.13 kJ /mol), compared with samples without extra oxidant (192.97 kJ /mol).
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom