摘要：【中文】本发明提供了非吸湿硬钎焊剂，用于制备非吸湿硬钎焊剂的方法，以及用于制备水合铯铝氟化物的方法。用于制备非吸湿硬钎焊剂的示例性方法包括制备包含铝、铯和氟的混合物。制得的混合物具有约(1):(1.1‑1.2):(4.0‑4.2)的铝：铯：氟摩尔比。该方法还包括在高于约90℃的温度下干燥混合物，以形成包含基于产物的总质量至少约20质量％的水合铯铝氟化物的产物。 【EN】The present invention provides non-hygroscopic brazing flux, a method for preparing non-hygroscopic brazing flux, and a method for preparing cesium aluminum fluoride hydrate. An exemplary method for making a non-hygroscopic brazing flux includes making a mixture comprising aluminum, cesium, and fluorine. The resulting mixture has about (1) to (1.1-1.2) to (4.0-4.2) aluminum: cesium: molar ratio of fluorine. The method further includes drying the mixture at a temperature above about 90 ℃ to form a product comprising at least about 20 mass% cesium aluminum fluoride hydrate, based on the total mass of the product.