B2O3引入量对SiO2Al2O3BaOCaOB2O3系封接玻璃性能影响

Influence of B2O3 Content on Properties of SiO2 Al2O3 BaO CaO B2O3 Seal Glass

摘要:

采用传统工艺制备出B2O3引入量分别为0,56,112,168g的SiO2Al2O3BaOCaOB2O3固体氧化物燃料电池(SOFC)封接玻璃,并通过傅里叶红外光谱仪(FTIR)、高温显微镜(HSM)、X射线衍射仪(XRD)、热膨胀仪、电化学工作站及扫描电镜（SEM）等手段,系统研究了B2O3引入量对SOFC封接玻璃结构与封接性能(润湿性和玻璃粉烧结性、玻璃特征温度以及玻璃析晶所产生的热膨胀系数变化、玻璃陶瓷的电性能和封接界面稳定性)的影响.结果表明：随着B2O3引入量的增加,SOFC封接玻璃结构中的[BO3]含量不断增加,[SiO4]含量不断减少;SOFC封接玻璃封接性能的变化规律取决于其结构的变化,其中B2O3引入量分别为112,168g的玻璃性能满足实际SOFC封接玻璃的要求,可用于实际SOFC单电池的封接.

Abstract:

The SiO2 Al2O3 BaO CaO B2O3sealing glasses with 0,56,112,168gB2O3 addition in solid oxide fuel cell(SOFC) were prepared by a conventional route. The effects of B2O3 content on the structure and sealing performance of the glasses(the wettability; the sintering of glass powder; the characteristic temperature of glass and change in thermal expansion coefficient caused by crystallization; the electric properties and sealing surface stability of glass ceramic) were researched systemically by Fourier infrared spectrum(FTIR), high temperature microscope(HSM), X ray diffraction(XRD), thermal expansion instrument, electrochemical workstation and scanning electron microscope(SEM). The results indicate that the content of[BO3]increases, but the [SiO4]decreases with the B2O3 content increasing; the variation rule of sealing properties in four kinds of glass depend on the change of their structure, and the glasses with 112,168g B2O3 addition meet the requirements for SOFC sealing glass, which can be used for the sealing of SOFC single battery.