A novel La0.8Ba0.2CrO3-YSZ NTC composite ceramic with "core-shell" structures
A novel La0.8Ba0.2CrO3-YSZ NTC composite ceramic with "core-shell" structures
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一种新型“核壳”结构La0.8Ba0.2CrO3-YSZ NTC复合陶瓷
DOI：
10.1007/s10854-019-01122-5
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Chang Aimin
中科院分区：
文献类型：
--
作者：
Zheng Yang;Chen Mingxing;Zhang Huimin;Ma Panfei;Liu Ting;Jiang Hui;Chang Aimin
通过物理包覆，将“核壳”结构应用于NTC陶瓷以调节电阻值，且几乎不改变热常数B。选择高ρ的钇稳定氧化锆（YSZ）为核，低ρ、低B的La0.8Ba0.2CrO3为壳，制备了具有“核-壳”结构的La0.8Ba0.2CrO3-YSZ NTC陶瓷。采用经典的单轴压制法成功制备了“核-壳”结构的NTC陶瓷。在1550 °C下烧结4小时后，核和壳非常好地粘合而没有任何开裂。电阻值随芯体直径的增大而增大，而B值变化不大。
A “core–shell” structure by physical coating was applied to NTC ceramics for adjusting the resistance value and it almost does not change the thermal constant B. The yttrium stabilized zirconia (YSZ) with high ρ was chosen as the core and the La0.8Ba0.2CrO3with low ρ and low B was chosen as the shell for the La0.8Ba0.2CrO3–YSZ NTC ceramics with “core–shell” structures. The “core–shell” NTC ceramics were successfully fabricated by classical uniaxial pressing method. After sintering at 1550 °C for 4 h, the core and shell adhered very well without any cracking. The resistance value increased with the increase in the diameter of the core while without causing much change in the B value.