Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation process of zirconium oxide powder with high sintering activity and low specific surface area
The invention provides a preparation process of zirconium oxide powder with high sintering activity and low specific surface area, which comprises the following steps: by taking zirconium oxychloride octahydrate as a raw material, KOH as a precipitator and a mineralizer and yttrium oxide as a stabilizer, preparing a zirconium oxide precursor by adopting a reverse precipitation method, cleaning with ultrapure water to a certain pH and conductivity, carrying out micro-boiling hydrolysis in a reaction kettle, and drying to obtain the zirconium oxide powder with high sintering activity and low specific surface area. And washing, filter-pressing, drying and calcining the hydrolyzed slurry to obtain zirconium oxide granules, and carrying out spray granulation to obtain the zirconium oxide powder. The zirconium oxide powder prepared by the preparation process is small in specific surface area, high in sintering activity and convenient to form in a rear-end product, surface energy is greatly reduced, agglomeration of the powder is reduced, the specific surface area of the prepared high-temperature powder is 4-6.5 m < 2 >/g, the specific surface area of the prepared granulation powder is 5-7.1 m < 2 >/g, the prepared high-temperature powder can be sintered at 1400-1450 DEG C, and the average particle size of the prepared zirconium oxide powder is 60-85 nm.
本发明提供了一种高烧结活性和低比表面积氧化锆粉体的制备工艺，是将以八水合氧氯化锆为原料、KOH作为沉淀剂和矿化剂、氧化钇作为稳定剂、采用逆向沉淀法制备氧化锆前驱体，用超纯水清洗到一定的pH和电导率，在反应釜中微沸水解，水解浆料经洗涤、压滤烘干、煅烧得到氧化锆颗粒料，通过喷雾造粒制得。该制备工艺备出的氧化锆粉体比表面积小烧结活性高在后端的产品中便于成型，表面能大幅降低减少粉体的团聚，制得高温粉比表面积4‑6.5m2/g，造粒粉比表面积5‑7.1m2/g同时可在1400‑1450度烧结，平均粒径60‑85nm氧化锆粉。
Preparation process of zirconium oxide powder with high sintering activity and low specific surface area
The invention provides a preparation process of zirconium oxide powder with high sintering activity and low specific surface area, which comprises the following steps: by taking zirconium oxychloride octahydrate as a raw material, KOH as a precipitator and a mineralizer and yttrium oxide as a stabilizer, preparing a zirconium oxide precursor by adopting a reverse precipitation method, cleaning with ultrapure water to a certain pH and conductivity, carrying out micro-boiling hydrolysis in a reaction kettle, and drying to obtain the zirconium oxide powder with high sintering activity and low specific surface area. And washing, filter-pressing, drying and calcining the hydrolyzed slurry to obtain zirconium oxide granules, and carrying out spray granulation to obtain the zirconium oxide powder. The zirconium oxide powder prepared by the preparation process is small in specific surface area, high in sintering activity and convenient to form in a rear-end product, surface energy is greatly reduced, agglomeration of the powder is reduced, the specific surface area of the prepared high-temperature powder is 4-6.5 m < 2 >/g, the specific surface area of the prepared granulation powder is 5-7.1 m < 2 >/g, the prepared high-temperature powder can be sintered at 1400-1450 DEG C, and the average particle size of the prepared zirconium oxide powder is 60-85 nm.
本发明提供了一种高烧结活性和低比表面积氧化锆粉体的制备工艺，是将以八水合氧氯化锆为原料、KOH作为沉淀剂和矿化剂、氧化钇作为稳定剂、采用逆向沉淀法制备氧化锆前驱体，用超纯水清洗到一定的pH和电导率，在反应釜中微沸水解，水解浆料经洗涤、压滤烘干、煅烧得到氧化锆颗粒料，通过喷雾造粒制得。该制备工艺备出的氧化锆粉体比表面积小烧结活性高在后端的产品中便于成型，表面能大幅降低减少粉体的团聚，制得高温粉比表面积4‑6.5m2/g，造粒粉比表面积5‑7.1m2/g同时可在1400‑1450度烧结，平均粒径60‑85nm氧化锆粉。
Preparation process of zirconium oxide powder with high sintering activity and low specific surface area
一种高烧结活性和低比表面积氧化锆粉体的制备工艺
ZHONG XIAOLIANG (Autor:in)
30.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Preparation method of high-sintering-activity zirconium oxide powder
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2020
Preparation method of high-performance composite zirconium oxide powder
| Europäisches Patentamt | 2020