两步溶胶-凝胶方法制备复合羰基铁粉(英文)

Preparation of a Hybrid Carbonyl Iron Powder by a Twofold Sol-Gel Technique

采用两步溶胶-凝胶方法对微米碳基铁粉进行了包覆和接枝的复合处理,以提高其在水性体系的抗氧化性能和稳定性。研究了复合处理对羰基铁粉的微州组织、晶体结构、磁学性能及其在水性体系中的抗氧化和抗沉降性能等的影响。研究表1明,制备的复合羰基铁粉颗粒表面具非晶态S1O_2膜层和采水性基团,其磁学性能基本不变。复合羰基铁粉在室温水性体系和高温空气中的抗氧化性能得到显著提高,其在水性体系中的抗沉降性能也得到一定程度的提高。复合处理可有效著改善羰基铁粉在水性体系中的稳定性,从而推动其应用。

A twofold sol-gel technique was used to conduct a hybrid treatment on a micro carbonyl iron powder(CIP) by coating and grafting,to improve its anti-oxidation property and stability in aqueous systems.And influences of the hybrid treatment on microstructures,crystalline structure,magnetic properties,anti-oxidation and anti-sediment properties of the CIP in aqueous systems were studied.It was found that the prepared hybrid carbonyl iron powder(h-CIP) had non-crystalline SiO_2 coating and hydrophilic groups on surface of particle,and magnetic properties of the powder were changed little.Anti-oxidation property of the h-CIP was improved markedly both in an aqueous system at room temperature and in air at high temperatures,and its anti-sediment property in the aqueous system was improved to some extent too.It was deduced that the hybrid treatment could ameliorate stability of the CIP in aqueous systems effectively,and promote its applications.