摘要
以硼硅酸盐系玻璃和Al2O3粉料为原料,采用低温烧结法制备了玻璃/Al2O3系LTCC材料。设计玻璃中碱金属氧化物的质量分数为0~6%,研究了碱金属氧化物添加量和烧成温度对玻璃,Al2O3材料的烧结性能、热性能、介电性能和力学性能的影响。随着碱金属氧化物含量增加,玻璃/Al2O3材料的体积密度、相对介电常数、抗弯强度增加,而介电损耗恶化。当碱金属氧化物添加的质量分数为2%,材料于875℃烧结良好,显示出优异的性能:体积密度为2.84g/cm^3,相对介电常数7.71,介电损耗1.15×10^-3(于10MHz下测试),抗弯强度为158MPa,热导率为2.65W/(m·℃),线膨胀系数为7.77×10^-6/℃。
Borosilicate glass/Al2O3 system LTCC materials were prepared with borosilicate glass and Al2O3powder using low-temperature sintering method. The effects of alkalis (Na2O+K2O+LiO2) contents and sintering temperature on sintering, thermal, dielectric and strength properties of the glass/Al2O3 materials were investigated through modifying alkalis content in the glass from 0 to 6%(mass fraction). With the increase of alkalis content in the materials, corresponding increases are found in bulk density, εr and three-point bending strength of the materials, while their dielectric loss get bad. By contrast, the material with 2%(mass fraction) alkalis exhibits better properties of bulk density p=2.84 g/cm3,εr=7.71, dielectric loss tanδ=1.15× 10^-3(at 10 MHz), bending strength σ= 158 MPa, thermal conductivity 2=2.65 W/(m. ℃), thermal expansion coefficient at = 7.77 ×10^-6/℃, sintered at 875 ℃.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2014年第8期42-45,48,共5页
Electronic Components And Materials