Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of lanthanum zirconate spherical powder for thermal spraying
The invention discloses a preparation method of lanthanum zirconate spherical powder for thermal spraying, wherein the method comprises the following steps: carrying out wet ball milling on La2O3 andZrO2 in a molar ratio of 1:2 and a molten salt medium, uniformly mixing, drying the mixture, heating to 900-1200 DEG C, keeping the temperature for 4-10 h, and cooling to room temperature; washing thereaction product with water to remove the residual molten salt medium, adding a binder and deionized water to obtain slurry, and granulating the slurry by using spray drying equipment to obtain spherical powder; and calcining the prepared spherical powder at high temperature to remove the binder and densify the spherical powder to obtain the lanthanum zirconate spherical powder for thermal spraying. Molten salt is used as a reaction medium to provide a liquid-phase environment, so that the reaction temperature is reduced, and the growth of particles is avoided; oxides are adopted as raw materials, the conversion efficiency and the production efficiency are high, molten salt can be recycled, the synthesis cost is low, time is short, operation is easy, and the method is suitable for mass production.
本发明公开了一种用于热喷涂的锆酸镧球形粉体制备方法，包括如下步骤：将摩尔比为1:2的LaO和ZrO与熔盐介质通过湿法球磨混合均匀，混合物干燥后升温至900～1200℃，保温4～10小时，冷却至室温；将反应产物用水洗除去残留的熔盐介质后，加入粘结剂和去离子水得到浆料，利用喷雾干燥设备对所述浆料进行造粒制备得到球形粉体；将制备球形粉体在高温下煅烧处理去除其中粘结剂并使球形粉致密化，得到热喷涂用锆酸镧球形粉体。本发明通过熔盐作为反应介质提供液相环境，降低了反应温度，避免了颗粒的长大；本发明采用氧化物为原料，转化效率和生产效率较高，熔盐可以回收利用，合成成本低、时间短，操作简单，适合大批量生产。
Preparation method of lanthanum zirconate spherical powder for thermal spraying
The invention discloses a preparation method of lanthanum zirconate spherical powder for thermal spraying, wherein the method comprises the following steps: carrying out wet ball milling on La2O3 andZrO2 in a molar ratio of 1:2 and a molten salt medium, uniformly mixing, drying the mixture, heating to 900-1200 DEG C, keeping the temperature for 4-10 h, and cooling to room temperature; washing thereaction product with water to remove the residual molten salt medium, adding a binder and deionized water to obtain slurry, and granulating the slurry by using spray drying equipment to obtain spherical powder; and calcining the prepared spherical powder at high temperature to remove the binder and densify the spherical powder to obtain the lanthanum zirconate spherical powder for thermal spraying. Molten salt is used as a reaction medium to provide a liquid-phase environment, so that the reaction temperature is reduced, and the growth of particles is avoided; oxides are adopted as raw materials, the conversion efficiency and the production efficiency are high, molten salt can be recycled, the synthesis cost is low, time is short, operation is easy, and the method is suitable for mass production.
本发明公开了一种用于热喷涂的锆酸镧球形粉体制备方法，包括如下步骤：将摩尔比为1:2的LaO和ZrO与熔盐介质通过湿法球磨混合均匀，混合物干燥后升温至900～1200℃，保温4～10小时，冷却至室温；将反应产物用水洗除去残留的熔盐介质后，加入粘结剂和去离子水得到浆料，利用喷雾干燥设备对所述浆料进行造粒制备得到球形粉体；将制备球形粉体在高温下煅烧处理去除其中粘结剂并使球形粉致密化，得到热喷涂用锆酸镧球形粉体。本发明通过熔盐作为反应介质提供液相环境，降低了反应温度，避免了颗粒的长大；本发明采用氧化物为原料，转化效率和生产效率较高，熔盐可以回收利用，合成成本低、时间短，操作简单，适合大批量生产。
Preparation method of lanthanum zirconate spherical powder for thermal spraying
一种用于热喷涂的锆酸镧球形粉体制备方法
LIU PING'AN (Autor:in) / WU HONGFENG (Autor:in) / CEN SIJIN (Autor:in) / DING HUILING (Autor:in)
15.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
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