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发明授权
CN107585787B Sm-Eu-Dy三稀土离子钽酸盐及其制备方法与应用 有权

Sm-Eu-Dy三稀土离子钽酸盐及其制备方法与应用
摘要：
本发明公开了一种Sm‑Eu‑Dy三稀土离子钽酸盐及其制备方法与应用，该Sm‑Eu‑Dy三稀土离子钽酸盐的化学通式为SmaEubDycTaO7，其中，a+b+c＝3，a、b、c＝0.8～1.2。其制备方法包括如下步骤：1)按化学计量比称取氯化铕、硝酸钐、硝酸镝和草酸钽，并与设定量的柠檬酸在保温条件下进行机械混合，混合过程中加入浓氨水中和溶液，再在保温条件下进行机械混合促进化学反应的进行。2)将所得溶液进行干燥，随后在高温下煅烧去除碳杂质，即得Sm‑Eu‑Dy三稀土离子钽酸盐粉末。该Sm‑Eu‑Dy三稀土离子钽酸盐，高温热稳定性好，热导系数低，可作为热障涂层材料进行应用。
摘要（英）：

The invention discloses a Sm-Eu-Dy tri-rare-earth ion tantalate and a preparation method and application thereof. The general chemical formula of the Sm-Eu-Dy tri-rare-earth ion tantalate is SmEuDyTaO<7>, wherein the a, b and c meet the relationship of a+b+c=3 and are separately in a range of 0.8-1.2. The preparation method comprises the following steps: (1) weighing europium chloride, samarium nitrate, dysprosium nitrate and tantalum oxalate according to a stoichiometric ratio, performing mechanical mixing with citric acid with a preset amount under a heat preservation condition, adding a concentrated ammonia water neutralization solution during the mixing process, and carrying out mechanical mixing to promote a chemical reaction under a heat preservation condition; and (2) drying the obtained solution, and then carrying out calcination at a high temperature to remove carbon impurities to obtain the Sm-Eu-Dy tri-rare-earth ion tantalate powder. The Sm-Eu-Dy tri-rare-earth iontantalate has good high-temperature thermal stability and low thermal conductivity, and can be used as a thermal barrier coating material.

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