Preparation method of electrocaloric ceramic material and electrocaloric ceramic material thereof: Fid-Bau Portal

Preparation method of electrocaloric ceramic material and electrocaloric ceramic material thereof

ZHOU CHAO / YU TIANTIAN / TIAN FANGHUA

The preparation method comprises the following steps: weighing raw materials according to the atomic percent of (1-x) Ba (Ti < 0.8 > Zr < 0.2 >) O < 3-x > (Ba0. 8Pb < 0.2 >) TiO3, mixing, then carrying out ball milling, and drying to obtain a mixed raw material, x being greater than or equal to 0 and less than 1; pre-sintering the mixed raw material, and cooling along with a furnace to obtain a primary sample; grinding the primary sample into powder, and then carrying out ball milling again to obtain powder; adding an adhesive into the powder, granulating, sieving and tabletting to obtain a wafer sample; performing primary heat treatment on the wafer sample to obtain a sample; the electrocaloric ceramic material is obtained by polishing the sample, brushing silver, drying and performing secondary heat treatment, and the electrocaloric ceramic material is low in environmental pollution and has excellent refrigeration effect and breakdown resistance.

公开了一种具有电卡效应的电卡陶瓷材料的制备方法及其电卡陶瓷材料，制备方法中，根据(1‑x)Ba(Ti0.8Zr0.2)O3‑x(Ba0.8Pb0.2)TiO3的原子百分比称取原料，混合后球磨、烘干得到混合原料，x大于等于0且小于1；将所述混合原料预烧后随炉冷却得到初级样品；将所述初级样品研磨成粉后再次球磨，得到粉体；在所述粉体中加入粘合剂造粒后过筛压片得到圆片样品；将所述圆片样品进行一次热处理后得到样品；将所述样品打磨后刷银，烘干后进行二次热处理得到电卡陶瓷材料，电卡陶瓷材料对环境污染小，同时具有优异的制冷效果和抗击穿能力。

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