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Preparation method of zirconia powder for ceramics
The invention discloses a preparation method of zirconia powder for ceramics. The method is as follows: carrying out thermal decomposition on zirconium n-butoxide to obtain thermal decomposition powder, cooling to the temperature of less than or equal to 100 DEG C, and discharging; adding yttrium nitrate, calcium nitrate, a dispersing agent and water into the calcined discharged material, heating,stirring, dissolving, adding into a grinder, grinding until the particle size is 200-400nm, and carrying out spray drying to obtain a spray-dried material; calcining the spray-dried material in a rotary kiln, and cooling until the material temperature is less than or equal to 120 DEG C to obtain a secondary calcined material; and carrying out jet milling on the secondary calcined material until the particle size is 2-10 [mu] m to obtain the zirconia powder for ceramics. The powder with the coating structure is formed, the powder with the coating structure is used for firing zirconia ceramic,the thermal conductivity of the ceramic is low, the mechanical strength and the thermal expansion coefficient are high, and the powder prepared through the method is small in primary particle, high incrystallinity, good in sphericity, good in dispersity and convenient to process.
本发明公开了一种陶瓷用氧化锆粉末的制备方法。将正丁醇锆经过热分解，得到热分解粉末,再降温至温度为≤100℃后出料；将煅烧出料加入硝酸钇、硝酸钙、分散剂和水，加热搅拌溶解，然后加入研磨机内研磨至粒径200‑400nm,然后经过喷雾干燥，得到喷雾干燥料；将喷雾干燥料在回转窑内煅烧，然后冷却至料温≤120℃，得到二次煅烧料；将二次煅烧料经过气流粉碎，粉碎至粒径为2‑10μm，得到陶瓷用氧化锆粉末。本发明形成一种包覆结构的粉体，此结构的粉体用于烧制氧化锆陶瓷，陶瓷的热导率低，且力学强度和热膨胀系数高，且本发明制备的粉末一次颗粒小，结晶度高，球形度好，分散性好，方便加工。
Preparation method of zirconia powder for ceramics
The invention discloses a preparation method of zirconia powder for ceramics. The method is as follows: carrying out thermal decomposition on zirconium n-butoxide to obtain thermal decomposition powder, cooling to the temperature of less than or equal to 100 DEG C, and discharging; adding yttrium nitrate, calcium nitrate, a dispersing agent and water into the calcined discharged material, heating,stirring, dissolving, adding into a grinder, grinding until the particle size is 200-400nm, and carrying out spray drying to obtain a spray-dried material; calcining the spray-dried material in a rotary kiln, and cooling until the material temperature is less than or equal to 120 DEG C to obtain a secondary calcined material; and carrying out jet milling on the secondary calcined material until the particle size is 2-10 [mu] m to obtain the zirconia powder for ceramics. The powder with the coating structure is formed, the powder with the coating structure is used for firing zirconia ceramic,the thermal conductivity of the ceramic is low, the mechanical strength and the thermal expansion coefficient are high, and the powder prepared through the method is small in primary particle, high incrystallinity, good in sphericity, good in dispersity and convenient to process.
本发明公开了一种陶瓷用氧化锆粉末的制备方法。将正丁醇锆经过热分解，得到热分解粉末,再降温至温度为≤100℃后出料；将煅烧出料加入硝酸钇、硝酸钙、分散剂和水，加热搅拌溶解，然后加入研磨机内研磨至粒径200‑400nm,然后经过喷雾干燥，得到喷雾干燥料；将喷雾干燥料在回转窑内煅烧，然后冷却至料温≤120℃，得到二次煅烧料；将二次煅烧料经过气流粉碎，粉碎至粒径为2‑10μm，得到陶瓷用氧化锆粉末。本发明形成一种包覆结构的粉体，此结构的粉体用于烧制氧化锆陶瓷，陶瓷的热导率低，且力学强度和热膨胀系数高，且本发明制备的粉末一次颗粒小，结晶度高，球形度好，分散性好，方便加工。
Preparation method of zirconia powder for ceramics
一种陶瓷用氧化锆粉末的制备方法
JIANG YANGFANG (author)
2020-08-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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