| The rapid development of information technology put forward higher requirements on the performance of the electronic components, and the electronic components of the sealing technology is one of the main factors influencing the device performance. The borate glass in numerous sealing material has many advantages, such as low sealing temperature, good chemical stability, high technology content and added value, that makes it has a broad prospect of application in the development of low temperature without sealing glass in the future. But compared with the traditional sealing glass, there was an obvious gap in stability and low temperature. In order to solve this situation, we took the B2O3-ZnO-Bi2O3 glass system as the research object in this topic, researched the influence regularity and mechanism of bending strength, water resisting property, softening temperature and coefficient of thermal expansion by the change of P2O5, V2O5 and BaO content. The glass after optimization is applied to the preparation of silver electrode materials. Then we discussed the influence on the properties of electrode materials by the change of addition amount of sealing glass powder and sintering temperature. The main research results are as follows:P2O5 participate in the glass network in the form of glassformer, which has a poor structural stability because of the existence of P=O double bond in [PO4]. With the increase of the P2O5 content, the coefficient of thermal expansion increased from 7.19×10-6/? without P2O5 to 7.49×10-6/?, and kept a good thermal stability, the softening temperature of the glass has reduction from 492? to 481?. While the bending strength of glass dived from 48.75MPa without P2O5 to 35.46MPa, the pH value after water resistance test increased from 8.28 to 9.15.Add V2O5 in containing 4wt.%P2O5 glass,due to the obvious effect of polarization of the V2O5 is obvious,independent groups increased after broken the glass network,.With its content from 2 to 10wt.%,glass softening temperature was reduced from 487? to 465?,expansion coefficient increased by 7.41×10-6/? to 7.78×10-6/?,after the water resistance test,the pH value increased from 8.54 to 9.22.When the content is 4wt.%, glass bending strength reached the maximum 48 MPa.At the same time, when the content of V2O5 more than 8wt.%,the sample of glass after heat treatment start to separate out Zn2SiO4 crystals.BaO as network oxide,after join in the formula containing 4wt.% BaO content< 6wt.%,due to the effect of broken network,with the increase of its content,glass softening temperature was reduced from 480? to 440?,reach the maximum.Expansion coefficient increased by 7.58×10-6/? to 7.76×10-6/?, water resistance and bending strength also successively get worse.When BaO content> 6wt.%, with the increase of the content, due to the agglomeration effect enhanced, glass softening temperature increased,coefficient of expansion began to reduce, but the glass strength and water resistance was improved.After the adjustment of glass formula is (wt.%):3.43%SiO2,5.14%Li2O,35.9% B2O3,30%ZnO,2.56%Al2O3,8.56%Bi2O3,3.56%P2O5,3.7%V2O5,8%BaO, the glass softening temperature is 448?, the average linear expansion coefficient of 7.6876×10-6/?, bending strength is 49.55 MPa, water resistance is higher than the basic glass, and not have crystallization at 650? sintering,2in line with the performance requirements of experimental target.The glass after optimization is applied to the preparation of silver electrode materials. The experimental results show that the best glass powder content is 5wt.%, the best sintering peak temperature is 750?. |
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