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    • 2. 发明公开
    • 반도체 자기 조성물
    • SEMICONDUCTOR CERAMIC COMPOSITION
    • KR1020080063264A
    • 2008-07-03
    • KR1020087002793
    • 2005-08-11
    • 히타치 긴조쿠 가부시키가이샤
    • 시마다타케시마츠모토케이테라오코이치토지카즈야니시카와카즈히로
    • C04B35/468
    • A BaTiO3 based semiconductor ceramic composition wherein without using Pb, the Curie temperature thereof can be shifted in the positive direction and further the resistivity thereof at room temperature thereof is markedly lowered. In this composition, a part of Ba is replaced with element A1 (at least one of Na, K, Li) and element A2 (Bi), and further Ba is replaced with a specified amount of element Q. Alternatively, a part of Ba is replaced with element A1 (at least one of Na, K, Li) and element A2 (Bi), and further a part of Ti is replaced with a specified amount of element M. Consequently, this composition realizes optimum atomic valence control and enables substantial drop of resistivity at room temperature, thereby being most suitable for use in a PTC thermistor, a PTC heater, a PTC switch, a temperature detector, etc., in particular, a heater for automobile or the like.
    • 一种BaTiO 3系半导体陶瓷组合物,其中,不使用Pb时,其居里温度可以向正方向移动,并且其室温下的电阻率进一步降低。 在该组成中,一部分Ba被元素A1(Na,K,Li中的至少一种)和元素A2(Bi)代替,并且还将Ba替换为规定量的元素Q.或者,一部分Ba 被元素A1(Na,K,Li中的至少一种)和元素A2(Bi)代替,并且还将一部分Ti用特定量的元素M代替。因此,该组合实现了最佳的原子价控制,并且使得 PTC热敏电阻,PTC加热器,PTC开关,温度检测器等,特别是用于汽车等的加热器最为适用。
    • 6. 发明公开
    • 전자 디바이스용 유전체 자기 조성물
    • 用于电子设备的电介质陶瓷组合物
    • KR1020080026553A
    • 2008-03-25
    • KR1020077029949
    • 2005-06-24
    • 히타치 긴조쿠 가부시키가이샤
    • 타다토모유키니시카와카즈히로토지카즈야쿠라카즈히로시마다타케시
    • C04B35/465C04B35/50H01B3/12H01P7/10
    • This invention provides a dielectric ceramic composition for an electronic device that has a high specific permittivity Ir and a high Qf value, and a low temperature coefficient df at a resonance frequency, and can control the temperature coefficient df while maintaining the high Qf value. This dielectric ceramic composition is an LnAlO3-CaTiO3 dielectric ceramic composition. In this composition, the molar ratio between LnAlO3 and CaTiO3 is optimized, and Al is replaced with a small amount of Ga. The above constitution provides a structure comprising an LnAlGaO3-CaTiO3 solid solution as a main phase and an Al-Ga oxide solid solution as a second phase, an alpha-Al2O3 being substantially absent in the structure. Further, the temperature coefficient df can be controlled while maintaining the small temperature coefficient df at the resonance frequency and the high Qf value. ® KIPO & WIPO 2008
    • 本发明提供一种用于电子器件的电介质陶瓷组合物,其具有高的比介电常数Ir和高Qf值,以及谐振频率处的低温度系数df,并且可以在保持高Qf值的同时控制温度系数df。 该介电陶瓷组合物是LnAlO3-CaTiO3介电陶瓷组合物。 在该组成中,LnAlO 3与CaTiO 3的摩尔比优化,Al少量被Ga代替,上述结构提供了以LnAlGaO3-CaTiO3固溶体为主相,Al-Ga氧化物固溶体 作为第二相,在结构中基本上不存在α-Al 2 O 3。 此外,可以在将温度系数df保持在共振频率和高Qf值的同时,控制温度系数df。 ®KIPO&WIPO 2008