Lanthanum oxide doped strontium barium niobate based glass ceramic energy storage material and preparation method thereof
A strontium barium niobate based, glass ceramic technology, applied in the field of dielectric energy storage materials, can solve the problems of low charge-discharge conversion efficiency, low dielectric constant, low breakdown field strength, etc. The effect of increasing theoretical density and short charging and discharging time
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Embodiment 1
[0038] Lanthanum oxide-doped strontium barium niobate-based glass-ceramic material with high energy storage density and fast charge and discharge:
[0039] 1) BaCO with a purity greater than 99.5wt% 3 , SrCO 3 , Nb2O5, SiO 2 、Al 2 o 3 , B 2 o 3 , La 2 o 3 For raw material ingredients, the molar percentages of the above components are 20%, 20%, 20%, 33.5%, 5%, 1.5%, 0%. After ball mixing for 20 hours, dry and melt at 1550°C for 2 hours ;
[0040] 2) Pouring the high-temperature melt obtained in step 1) into a metal mold, annealing for stress relief at 650°C for 5 hours, and then cutting to obtain glass flakes with a thickness of about 1.5mm;
[0041] 3) The glass flakes prepared in step 2) were kept at 1100° C. for 3 hours for controlled crystallization to obtain glass ceramics.
[0042] XRD such as figure 1 As shown, there are two items in the XRD scanning pattern of this component are Ba 0.27 Sr 0.75 Nb 2 o 5.78 and BaAl 2 Si 2 o 8 ; SEM such as figure 2 A...
Embodiment 2
[0044] Lanthanum oxide-doped strontium barium niobate-based glass-ceramic material with high energy storage density and fast charge and discharge:
[0045] 1) BaCO with a purity greater than 99.5wt% 3 , SrCO 3 , Nb2O5, SiO 2 、Al 2 o 3 , B 2 o 3 , La 2 o 3 For raw material batching, the molar percentages of the above components are 20%, 20%, 20%, 33.5%, 5%, 1.5%, 0.2%. After ball milling for 20 hours, dry and melt at 1550°C for 2 hours;
[0046] 2) Pouring the high-temperature melt obtained in step 1) into a copper mold, annealing for stress relief at 650° C. for 5 hours, and then cutting to obtain glass flakes with a thickness of about 1.5 mm;
[0047] 3) The glass flakes prepared in step 2) were kept at 1100° C. for 3 hours for controlled crystallization to obtain glass ceramics.
[0048] The XRD of the sample that present embodiment makes is as figure 2 As shown, there are two items in the XRD scanning pattern of this component are Ba 0.27 Sr 0.75 Nb 2 o 5.78 ...
Embodiment 3
[0051] Lanthanum oxide-doped strontium barium niobate-based glass-ceramic material with high energy storage density and fast charge and discharge:
[0052] 1) BaCO with a purity greater than 99.5wt% 3 , SrCO 3 , Nb2O5, SiO 2 、Al 2 o 3 , B 2 o 3 , La 2 o 3 For raw material batching, the molar percentages of the above components are 20%, 20%, 20%, 33.5%, 5%, 1.5%, 0.5%, after ball milling for 20 hours, drying, and melting at 1550 °C for 2 hours;
[0053] 2) Pouring the high-temperature melt obtained in step 1) into a metal mold, annealing for stress relief at 650°C for 5 hours, and then cutting to obtain glass flakes with a thickness of about 1.5mm;
[0054] 3) The glass flakes prepared in step 2) were kept at 1100° C. for 3 hours for controlled crystallization to obtain glass ceramics.
[0055] XRD such as figure 1 As shown, there are two items in the XRD scanning pattern of this component are Ba 0.27 Sr 0.75 Nb 2 o 5.78 and BaAl 2 Si 2 o 8 ; SEM such as figu...
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