Low-temperature fired ceramic and electronic component

A low-temperature fired ceramic comprising:

• a fired glass component represented by RO—ZnO—Al2O3—B2O3—SiO2, wherein
• RO is at least one selected from the group consisting of MgO, CaO, SrO, and BaO,
• a percentage of RO, a percentage of ZnO, and a percentage of Al2O3 in the fired glass component are each 0.1 mol % to 10 mol %, and
• a sum of the percentage of RO, the percentage of ZnO, and the percentage of Al2O3 in the fired glass component is 15 mol % or less, and
• one or more oxides of ceramic crystalline components that include at least one selected from the group consisting of Ba2Ti9O20, BaTi(BO3)2, BaTi4O9, BaTi5O11, Ba4Ti13O30, BaZn2Ti4O11, and Ba4ZnTi11O27.

An electronic component comprising:

• a low-permittivity ceramic layer containing a first low-temperature fired ceramic;
• and
• a high-permittivity ceramic layer containing a second low-temperature fired ceramic, the high-permittivity ceramic layer having a permittivity greater than the low-permittivity ceramic layer, wherein
• the first low-temperature fired ceramic contains a first fired glass component and one or more first oxides of ceramic crystalline components,
• the second low-temperature fired ceramic contains a second fired glass component and one or more second oxides of ceramic crystalline components,
• the first fired glass component and the second fired glass component are represented by RO—ZnO—Al2O3—B2O3—SiO2,
• RO is at least one selected from the group consisting of MgO, CaO, SrO, and BaO,
• a percentage of RO, a percentage of ZnO, and a percentage of Al2O3 in the first fired glass component and a percentage of RO, a percentage of ZnO, and a percentage of Al2O3 in the second fired glass component are each 0.1 mol % to 10 mol %, and
• a sum of the percentage of RO, the percentage of ZnO, and the percentage of Al2O3 in the first fired glass component and a sum of the percentage of RO, the percentage of ZnO, and the percentage of Al2O3 in the second fired glass component are each 15 mol % or less,
• a ratio of a percentage of SiO2 to a percentage of B2O3(SiO2/B2O3) in the first fired glass component is less than 3.4,
• the first low-temperature fired ceramic further comprises Al2O3 in addition to the Al2O3 contained in the first fired glass component, and a percentage of the Al2O3 in the first low-temperature fired ceramic, excluding the Al2O3 contained in the first fired glass component, is more than 0 wt % and 5 wt % or less,
• the one or more first oxides of the ceramic crystalline components include BaAl2Si2O8 and at least two selected from the group consisting of SiO2, ZnAl2O4, Zn2SiO4, and TiO2,
• a percentage of BaAl2Si2O8 in the first low-temperature fired ceramic is more than 0 wt % and 5 wt % or less, and
• the one or more second oxides of the ceramic crystalline components include at least one selected from the group consisting of Ba2Ti9O20, BaTi(BO3)2, BaTi4O9, BaTi5O11, Ba4Ti13O30, BaZn2Ti4O11, and Ba4ZnTi11O27.