Method for synthesizing barium ferrocobalt niobium oxide material by employing microwave process
A technology of niobium oxide and microwave method is applied in the field of preparing ceramic oxygen-permeable membrane materials and functional materials, which can solve the problems of small interval between the temperature of synthesizing pure cubic phase and the melting temperature of materials, high energy consumption and long time, etc. The effect of short synthesis time, low energy consumption and saving synthesis cost
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Embodiment 1
[0019] 1) Molar ratio Ba(OH) 2 ·8H 2 O: Co(NO3) 2 ·6H 2 O:Fe(NO3) 3 9H 2 O:Nb 2 o 5 =1:0.7:0.2:0.05 ratio, weigh Ba(OH) 2 ·8H 2 O 16.095 g, Co(NO3) 2 ·6H 2 O 10.289 g, Fe(NO3) 3 9H 2 O 4.123 g, Nb 2 o 5 0.665 g, after 20 minutes of high-speed mechanical stirring and mixing, a brownish-yellow viscous product was obtained;
[0020] 2) Put the viscous product in an oven and dry it at 80°C for 24 hours to obtain a dried powder;
[0021] 3) Put the dried powder into a high-temperature microwave oven, raise the temperature to 850°C with a power of 1.36KW, keep the temperature at 850°C for 45 minutes, and quench in the air. Pass through a 320 mesh sieve after grinding. The XRD spectrum of the synthesized product is shown in Figure 2, and no impurity phase exists.
Embodiment 2
[0023] 1)-3) synchronously with embodiment 1,
[0024] 4) Put the dried powder into a high-temperature microwave oven, raise the temperature to 850°C with a power of 1.36KW, keep it at 850°C for 60 minutes, and quench in the air. Pass through a 320 mesh sieve after grinding. The XRD spectrum of the synthesized product is shown in Figure 3, and no impurity phase exists.
[0025] It can be seen from the XRD patterns of Figure 2 and Figure 3 that the diffraction peak positions of the two synthesized samples are consistent with those of the standard spectrum (Figure 4), indicating that a good perovskite structure is formed and no impurity phase exists.
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