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The invention discloses a lead-free relaxation antiferroelectric ceramic material and a preparation method and application thereof, the chemical general formula of the material is Ba < 1-1.5 > x Bi < x > Ti < 0.93 > Li < 0.07 > O < 2.895 >, and x is more than or equal to 0.07 and less than or equal to 0.10; the preparation method comprises the following steps: weighing high-purity raw materials BaCO3, Li2CO3, Bi2O3 and TiO2 according to a stoichiometric ratio, sequentially carrying out ball milling, drying and sieving on the mixed raw materials, and then carrying out sealed calcination to obtain calcined ceramic powder; sequentially carrying out ball milling, drying and sieving on the ceramic powder, and then sequentially granulating and aging to obtain a ceramic green body; heating the ceramic body to remove polyvinyl alcohol added during granulation; and burying the heated ceramic green body in the calcined ceramic powder for sintering, and cooling to room temperature along with a furnace to obtain the product, the lead-free relaxation antiferroelectric ceramic material is successfully prepared through a solid phase method, has double ferroelectric hysteresis loop characteristics similar to antiferroelectric, and is high in dielectric constant and energy conversion efficiency, small in dielectric loss and polarization hysteresis, simple in preparation process, low in material cost and environmentally friendly.
本发明公开了一种无铅弛豫类反铁电陶瓷材料及其制备方法和应用，该材料的化学通式为Ba1‑1.5xBixTi0.93Li0.07O2.895，其中0.07≤x≤0.10；按照化学计量比称取高纯原料BaCO3、Li2CO3、Bi2O3和TiO2，并对混合原料依次进行球磨，烘干，过筛，然后密封煅烧，得到煅烧后的陶瓷粉体；对陶瓷粉体依次进行球磨，烘干，过筛，然后依次造粒，陈腐，得到陶瓷坯体；对陶瓷坯体加热除去造粒时添加的聚乙烯醇；将加热后的陶瓷坯体埋于煅烧后的陶瓷粉体中进行烧结，随炉冷却到室温后即得；本发明通过固相法成功制备出无铅弛豫类反铁电陶瓷材料，具有与反铁电体类似的双电滞回线特征，并且介电常数和能量转换效率高、介电损耗和极化回滞小、制备工艺简单、材料成本低、环境友好。
The invention discloses a lead-free relaxation antiferroelectric ceramic material and a preparation method and application thereof, the chemical general formula of the material is Ba < 1-1.5 > x Bi < x > Ti < 0.93 > Li < 0.07 > O < 2.895 >, and x is more than or equal to 0.07 and less than or equal to 0.10; the preparation method comprises the following steps: weighing high-purity raw materials BaCO3, Li2CO3, Bi2O3 and TiO2 according to a stoichiometric ratio, sequentially carrying out ball milling, drying and sieving on the mixed raw materials, and then carrying out sealed calcination to obtain calcined ceramic powder; sequentially carrying out ball milling, drying and sieving on the ceramic powder, and then sequentially granulating and aging to obtain a ceramic green body; heating the ceramic body to remove polyvinyl alcohol added during granulation; and burying the heated ceramic green body in the calcined ceramic powder for sintering, and cooling to room temperature along with a furnace to obtain the product, the lead-free relaxation antiferroelectric ceramic material is successfully prepared through a solid phase method, has double ferroelectric hysteresis loop characteristics similar to antiferroelectric, and is high in dielectric constant and energy conversion efficiency, small in dielectric loss and polarization hysteresis, simple in preparation process, low in material cost and environmentally friendly.
本发明公开了一种无铅弛豫类反铁电陶瓷材料及其制备方法和应用，该材料的化学通式为Ba1‑1.5xBixTi0.93Li0.07O2.895，其中0.07≤x≤0.10；按照化学计量比称取高纯原料BaCO3、Li2CO3、Bi2O3和TiO2，并对混合原料依次进行球磨，烘干，过筛，然后密封煅烧，得到煅烧后的陶瓷粉体；对陶瓷粉体依次进行球磨，烘干，过筛，然后依次造粒，陈腐，得到陶瓷坯体；对陶瓷坯体加热除去造粒时添加的聚乙烯醇；将加热后的陶瓷坯体埋于煅烧后的陶瓷粉体中进行烧结，随炉冷却到室温后即得；本发明通过固相法成功制备出无铅弛豫类反铁电陶瓷材料，具有与反铁电体类似的双电滞回线特征，并且介电常数和能量转换效率高、介电损耗和极化回滞小、制备工艺简单、材料成本低、环境友好。
Lead-free relaxation antiferroelectric ceramic material and preparation method and application thereof
一种无铅弛豫类反铁电陶瓷材料及其制备方法和应用
YAN FEI (author)
2024-11-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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