摘要
常温下分别使用KBH_4和NaH_2PO_2在水溶液中还原Ni^(2+)制得了Ni_(65)B_(35)和Ni_(89)P_(11)超细非晶合金(UFAAP),同时使用KBH_4和NaH_2PO_2还原Ni^(2+)制得了Ni_(73)P_(13)B_(14)UFAAP.Ni—P的粒径较大,约为110nm,Ni—B的粒径较小,约为20nm,Ni—P—B的粒径居其之间,约为40nm.XPS表明,Ni—P间的相互作用强于Ni—B间的相互作用,Ni—P—B中P的电子状态与Ni—P中的相似.Ni—P—B比Ni—P的比表面积高得多,Ni—P—B比Ni—B和Ni—P具有更好的非晶态稳定性,在573K热处理,它的非晶态保持完好.晶化结果也表明Ni—P—B中Ni—P间的相互作用比Ni—B间的强.
Ni65B35 and Ni89P11 ultrafine amorphous alloy particles (UFAAP) have been prepared by the reduction of Ni2+ in aqueous solution with KBH4 and NaH2PO2, respectively, at room temperature. Ni73P13B14 UFAAP has been prepared by the reduction of Ni2+ with KBH4 and NaH2PO2 at the same time. The Ni-P sample has relatively large particle size (c.a. 110nm) while Ni-B sample exhibits much smaller particle size (c.a. 20nm). The particle size of Ni-P-B (c.a. 40nm) is close to that of Ni-B. XPS showed that the interaction between Ni and P is stronger than that between Ni and B, since the electronic charge of P is similar in the Ni-P-B and Ni-P samples. However, the Ni-P-B sample is of higher surface area than Ni-P. In an addition, the Ni-P-B sample exhibits higher stability in amorphous state than Ni-P and Ni-B. The amorphous state of the Ni-P-B sample remained after heat treatment in N2 at 573K. The transformation of Ni3B to Ni3P during crystallization of the Ni-P-B sample also indicated that the interaction between Ni and P is stronger than that between Ni and B.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1995年第12期1168-1172,共5页
Acta Chimica Sinica
基金
国家自然科学基金
中国石化总公司发展部基础研究基金资助项目
