Forming regularity and relation between composition and property of B_2O_3-BaO-ZnO glass

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 B2O3BaOZnO glass were investigated. The results show that the composition range for forming B2O3BaOZnO 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 （510）×10 -6℃ -1, 480620℃ and （1.53.0）×10 10Ω·m, respectively.

B_2O_3-BaO-ZnO系统玻璃的形成规律及组成与性能之间的关系研究

用传统熔体冷却方法制得B2O3-B aO-ZnO三元系统玻璃,考察了该系统玻璃的形成规律,并且探索了该系统玻璃的组成与性能之间的关系。结果表明:该系统玻璃的形成范围较宽,但B2O3的引入摩尔分数最高不能超过75%,最低不能少于25%。B2O3的含量过高,熔体冷却时容易分相,而B2O3的含量过低时,则熔体在冷却时容易结晶。获得玻璃的线胀系数在(6～10)×10-6K-1之间;转变温度在530～580℃之间;室温下电阻率在(2～5)×1010Ω·m之间;密度值较大。

低熔点玻璃CaO-ZnO-B_2O_3的制备及性能

首次采用传统的熔融冷却技术制备了CaO-ZnO-B2O3低熔点玻璃。B2O3的含量过高或过低均易于产生析晶,而CaO含量过高,ZnO含量过低不利于玻璃的形成。研究了B2O3的含量对CaO-ZnO-B2O3玻璃基本性能的影响关系。玻璃的转变温度、室温电阻率和密度随着B2O3的增加而升高,而膨胀系数随着B2O3的增加而降低。