【摘 要】
：
B2O3-BaO-ZnO glass was prepared by using conventional melt quenching technology. The forming regularity and the relationship between the composition and the pro
论文部分内容阅读
B2O3-BaO-ZnO glass was prepared by using conventional melt quenching technology. The forming regularity and the relationship between the composition and the property of B2O3-BaO-ZnO glass were investigated. The results show that the composition range for forming B2O3-BaO-ZnO glass is very wide, but the content of B2O3 has a limit within mole fraction of 25%-75%. When the content of B2O3 is over the limit, the melt will be divided into two phases with different compositions and structures, whereas too low content of B2O3 will result in the crystallization of the melt during the cooling process. The thermal expansion coefficient, the transition temperature and the resistivity of the glass at room temperature are (5-10)×10-6 ℃-1, 480-620 ℃ and (1.5-3.0)×1010 Ω·m, respectively.
其他文献
通过《天鹅的故事》一课的教学,作者深刻认识到了课堂教学中学生的重要作用。教师要积极鼓励学生独立思考,并引导学生参与教学过程,强化课堂教学效果。
Through the teachin
The quantitative effect of Ni content on continuous cooling transformation (CCT) diagrams of novel air-cooled bainite steels was analyzed using artificial neura
沧州市地下水超采严重,已诱发了多方面的生态环境问题,解决我市地下水超采问题是当地水资源管理的迫切任务。本次规划从沧州市城区及农村两个区域分别进行压采,缓解和修复我
FVS1212/FVS0812 material was prepared by adding FVS1212 powder into FVS0812 powder. The structure and mechanical properties of materials were studied by means o
A new method was proposed to cope with the earth slope reliability problem under seismic loadings. The algorithm integrates the concepts of artificial neural ne
In order to accommodate electron beam to the brazing of the joints with various curve shapes and the brazing of thermo sensitive materials, the method of electr
The High Velocity Arc Spraying (HVAS) technology was used to prepare Fe-Al composite coatings by the adding of dif- ferent elements into cored wires to obtain d
A framework for end-to-end RSVP context transfer in Mobile IPv6(MIPv6) based on the architecture of F-HMIPv6 is proposed in this paper. The scheme provides an e
Alumina (Al2O3) particles reinforced copper matrix surface composites were fabricated on the bronze substrate using the vacuum infiltration casting technique. T
Three kinds of full compositional distribution (from 0 to 100wt%W) W/Cu FGMs (functionally graded materials) with high density is fabricated by resistance sinte