论文部分内容阅读
本文分别以Na_2MoO_4·2H_2O、Na_2CO_3、Na_2O_2三种物质作为Na的添加形式,通过与钼粉混合、压制、烧结的方式制备了Mo-Na合金,研究了不同烧结温度下3种Na的添加形式在合金烧结过程中的物相演变规律。通过XRD衍射进行了物相分析,AAS检测钠含量,结果表明:Na_2MoO_4·2H_2O在烧结过程中失去结晶水转变为Na_2MoO_4,随着烧结温度的升高,Na_2MoO_4部分挥发,Na含量逐渐降低;Na_2CO_3在低温烧结时,与钼反应转变为Na_2MoO_4,当烧结温度较高时,除了生成Na_2MoO_4外,还生成了Mo_2C;Na_2O_2在烧结过程中首先与钼反应转变为Na_2MoO_4·2H_2O,而后失去结晶水,生成Na_2MoO_4。
In this paper, three kinds of Na 2 MoO 4 · 2H 2 O, Na 2 CO 3, and Na 2 O 3 were added as the additive forms of Na respectively. Mo-Na alloys were prepared by mixing, pressing and sintering with molybdenum powders. The addition forms of Na Evolution of Phase during Alloy Sintering. The results of phase analysis by XRD and AAS showed that Na 2 MoO 4 · 2H 2 O lost crystalline water to Na 2 MoO 4 during the sintering process. With increasing sintering temperature, Na 2 MoO 4 partially volatilized and Na content decreased gradually. Na_2CO_3 When sintering at low temperature, the reaction with molybdenum changes into Na_2MoO_4. When the sintering temperature is higher, in addition to Na_2MoO_4, Mo_2C is formed. During the sintering process, Na_2_2O_2 first reacts with molybdenum to convert to Na_2MoO_4 · 2H_2O, and then loses crystal water to form Na_2MoO_4 .