PURPOSE: A production method of Al2O3(or Ga2O3)-Gd2O3-CeO2 powder for CeO2-based oxygen ionic conductors doped with Gd2O3, is provided to form fine particles and lower sintering temperature by coprecipitating oxygen ionic conducting materials and sintering aid materials. CONSTITUTION: The CeO2-based oxygen ionic conductors doped with Gd2O3 are produced by the following steps of: (i) dissolving cerium nitrate, gadolinium nitrate, and aluminum nitrate in water, wherein the raw materials are measured in the proportions corresponding to (Ce0.8Gd0.2O1.9)1-x(Al2O3)x (x=0.01-0.05); (ii) forming coprecipitates by adding (NH4)2C2O4H2O and NH4OH solution to the mixed solution until the pH of the solution is 10; (iii) washing coprecipitates with water and ethanol; (iv) drying at 120deg.C and calcining at 700deg.C for 1hr; (v) sieving dried powder to be less than 325mesh in size and pressing under pressure of 2000kg/cm2; (vi) sintering pressed compacts at 1400deg.C for 5hrs.
展开▼
机译：目的：提供一种Al2O3（或Ga2O3）-Gd2O3-CeO2粉体的制备方法，该方法用于掺杂Gd2O3的CeO2基氧离子导体，通过共沉淀氧离子传导性材料和烧结助剂来形成细小颗粒并降低烧结温度。组成：掺杂有Gd2O3的基于CeO2的氧离子导体是通过以下步骤制造的：（i）将硝酸铈，硝酸g和硝酸铝溶解在水中，其中原材料以对应于（Ce0。 8Gd0.2O1.9）1-x（Al2O3）x（x = 0.01-0.05）; （ii）通过向混合溶液中加入（NH 4）2 C 2 O 4 H 2 O和NH 4 OH溶液直到溶液的pH为10来形成共沉淀。 （iii）用水和乙醇洗涤共沉淀物; （iv）在120℃干燥并在700℃煅烧1小时; （v）筛分小于325目的干粉，并在2000kg / cm2的压力下加压; （vi）在1400℃下烧结压制坯5小时。
展开▼
