Preparation method and application of perovskite type ceramic material with high infrared emissivity: Fid-Bau Portal

Preparation method and application of perovskite type ceramic material with high infrared emissivity

GUO HONGFEI / ZHAO MIN / HOU XIAOHU / WU JIAFANG / HE ZHIHUI

The invention discloses a preparation method and application of a perovskite type ceramic material with high infrared emissivity, and the preparation method comprises the following steps: weighing each solid nitrate according to the molar ratio of the chemical formula (La0. 2Y0. 2Sm0. 2M10. 2M0. 2) (Cr1-xAex) O3 (x = 0-0.5), adding deionized water to prepare a solution A, adding a chelating agent into the solution A, stirring to obtain a solution A1, adding a dispersing agent into the solution B, stirring to obtain a solution A2, filtering, washing, and drying to obtain the perovskite type ceramic material with high infrared emissivity. Adjusting the pH value of the solution A2 to 7-9 to obtain a solution A3, heating the solution A3 in a water bath for 1-2 hours to obtain a solution A4, drying the solution A4 at 90-120 DEG C to obtain xerogel, grinding the xerogel to obtain powder B, calcining the ground powder B by using a muffle furnace to obtain precursor powder C, and calcining the precursor powder C by using a muffle furnace to obtain precursor powder B; and placing the graphite mold filled with the precursor powder C in a discharge plasma sintering furnace cavity for sintering to obtain the LaCrO3-based ceramic block material with high infrared emissivity.

本发明公开一种高红外发射率的钙钛矿型陶瓷材料的制备方法和应用，包括根据化学式(La0.2Y0.2Sm0.2M10.2M20.2)(Cr1‑xAex)O3(x＝0～0.5)的摩尔配比称量各固体硝酸盐，加入去离子水制备溶液A，溶液A中加入螯合剂搅拌得到溶液A1，溶液B中加入分散剂搅拌得到溶液A2，调节溶液A2的PH值至7～9得到溶液A3，溶液A3水浴加热1～2h得到溶液A4，溶液A4进行90～120℃烘干得到干凝胶，将干凝胶研磨得到粉末B，研磨后的粉末B使用马弗炉煅烧得到前驱体粉末C，装有前驱体粉末C的石墨模具置于放电等离子烧结炉腔内进行烧结得到具有高红外发射率的LaCrO3基陶瓷块材。

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