Provided are a dispersion medium for metal particle sintering that gives an electroconductive paste whereby metal particles are satisfactorily sintered at a low temperature even when not in a reducing atmosphere, and an electroconductive paste in which the dispersion medium is used. The dispersion medium for metal particle sintering according to an embodiment of the present disclosure contains formic acid and a basic compound, the basic compound being a nitrogen-containing compound represented by Formula (1), and a molar ratio (basic group/formic acid) of basic groups included in the basic compound to formic acid being from 0.50 to 1.20. [Formula 1] In Formula (1): Ra to Rc are the same or different and each represent a hydrogen atom or a hydrocarbon group that may have a substituent; the double line including a dashed line represents a single bond or a double bond, with Rc being absent in the case of a double bond; and any two of Ra to Rc may bond with each other and form a ring together with the adjacent nitrogen atom.
本发明提供了一种用于
金属颗粒烧结的分散介质,该分散介质可提供一种导电浆料,即使不在还原气氛中,
金属颗粒也能在低温下得到令人满意的烧结,本发明还提供了一种使用该分散介质的导电浆料。根据本公开的一个实施方案,用于
金属颗粒烧结的分散介质含有
甲酸和碱性化合物,碱性化合物是由式(1)表示的
含氮化合物,碱性化合物中包含的碱性基团与
甲酸的摩尔比(碱性基团/
甲酸)为 0.50 至 1.20。[式 1] 式(1)中:Ra至Rc相同或不同,各自代表氢原子或可能具有取代基的烃基;包括虚线的双线代表单键或双键,在双键的情况下Rc不存在;Ra至Rc中的任意两个可以相互键合,并与相邻的氮原子一起形成环。