外掺TiO_(2)铁封玻璃性能研究

Study on Properties of Iron-sealed Glass Doped with Additional TiO_(2)

SiO_(2)-TiO_(2)-SrO-R_(2)O系列铁封玻璃因其易于流散和润湿,广泛应用于接线端子的封接。在其系列一款铁封玻璃的基础上,制备外掺不同比例TiO_(2)玻璃样品,采用XRD、EMPA、超高温接触角测量仪等测试手段研究了外掺1.5%、3%、6%、9%、12%氧化物TiO_(2)对铁封玻璃断裂韧性的影响。结果表明:当外掺氧化物≥6%,封接后有明显晶体析出,主晶相为金红石,且随着外掺氧化物比例的增加,析出晶体量明显增加,断裂韧性有明显增强。当外掺氧化物比例为6%,其封接润湿角为23.6°,满足于封接润湿要求,同时使其封接后的样品断裂韧性从0.8提升到1.1。

SiO_(2)-TiO_(2)-SrO-R_(2)O series iron seal glass widely used in the sealing of compressor terminal is due to its good dispersion and wetting.On the basis of this series iron sealing glass,different glass samples were prepared by adding different proportions of TiO_(2).The effect of TiO_(2)on the fracture toughness of iron sealing glass was studied by XRD,EMPA and ultra-high temperature contact Angle measuring instrument when adding additional 1.5%,3%,6%,9%and 12%TiO_(2).The results show that crystal precipitation was obvious after sealing when the addition of oxides is more than 6%,and the main crystal phase is rutile.The amount of precipitated crystals and fracture toughness increased significantly with the increase of additional TiO_(2)doping ratio.The sealing wetting Angle is 23.6° which meets the requirements of sealing wettability when the additional TiO_(2)proportion is 6%.Moreover,the fracture toughness of the sample increased from 0.8 to 1.1 after sealing.