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Bismuth lanthanum ferrite ceramic and preparation method thereof
The invention discloses bismuth lanthanum ferrite ceramic and a preparation method thereof, which is used for solving the technical problem that the existing lanthanum-doped ceramic is low in nonlinearity coefficient. According to the technical scheme, the bismuth lanthanum ferrite ceramic is prepared according to the formula Bi<1-x>LaxFeO3. The preparation method comprises the steps: adjusting the proportion of lanthanum substituting the bismuth ferrite ceramic according to the formula Bi<1-x>Lax FeO3, taking a solid-phase sintering technology to be combined with an atmospheric treatment method, taking bismuth oxide, lanthanum oxide and iron oxide as raw materials, and obtaining the bismuth lanthanum ferrite ceramic with nonlinear volt-ampere characteristic in steps of mixing, ball milling, low-temperature pre-burning, high-temperature sintering and atmosphere treatment. The nonlinearity coefficient of the bismuth lanthanum ferrite ceramic prepared by adopting the method can reach 2.84 and is apparently higher than the nonlinearity coefficient 1.67 of the lanthanum-doping ceramic of the background art.
Bismuth lanthanum ferrite ceramic and preparation method thereof
The invention discloses bismuth lanthanum ferrite ceramic and a preparation method thereof, which is used for solving the technical problem that the existing lanthanum-doped ceramic is low in nonlinearity coefficient. According to the technical scheme, the bismuth lanthanum ferrite ceramic is prepared according to the formula Bi<1-x>LaxFeO3. The preparation method comprises the steps: adjusting the proportion of lanthanum substituting the bismuth ferrite ceramic according to the formula Bi<1-x>Lax FeO3, taking a solid-phase sintering technology to be combined with an atmospheric treatment method, taking bismuth oxide, lanthanum oxide and iron oxide as raw materials, and obtaining the bismuth lanthanum ferrite ceramic with nonlinear volt-ampere characteristic in steps of mixing, ball milling, low-temperature pre-burning, high-temperature sintering and atmosphere treatment. The nonlinearity coefficient of the bismuth lanthanum ferrite ceramic prepared by adopting the method can reach 2.84 and is apparently higher than the nonlinearity coefficient 1.67 of the lanthanum-doping ceramic of the background art.
Bismuth lanthanum ferrite ceramic and preparation method thereof
FAN HUIQING (Autor:in) / DONG GUANGZHI (Autor:in)
07.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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