主要研究了BN对PTCR陶瓷材料低温烧结的作用.对La掺杂BaTiO3PTCR陶瓷，在1100C的低温下烧结可以得到室温电阻率为150Ω.cm、升阻比为4.9个数量级的样品.对居里温度为360C的高居里点(Ba0.4Pb0.6)TiO3PTCR陶瓷材料，选用Nb2O5为半导化剂，BN和AST为助烧剂时，可以在1000°C左右的超低温下烧成.同时，对BN助烧剂的液相烧结机制进行了初步的探讨
Semiconducting BaTiO3 and high-curie-point (Ba0.4Pb0.6)TiO3 PTCR ceramics added with BN as a super low temperature sintering aid were investigated, andthe function of BN on the liquid-phase sintering of PTCR ceramics was studied.In comparison with AST and Si3N4, BN is a more effective additive that can not only reduce the sintering temperature but also widen firing range. La-doped BaTiO3 ceramics with BN addition can be obtained at 1100C. The sintered sample shows the PTC effect of 4.9 orders of magnitude and resistivity of 150. Nb-doped (Ba0.4Pb0.6)TiO3 PTCR ceramics with the high Curie point of 360C, added with BN and AST, can be sintered at 1000C. The super low temperature sintering for the PTCR ceramics has not been reported before.
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