良好材料 meaning in Chinese

sound material

So er doped phosphate glasses are good materials for making edwa , but the channel waveguides are not easy to be made
从离子交换平面波导的发光特性和稳定性上看，磷酸盐玻璃是目前实现激光放大的良好材料，但是条型波导的制备还有难度。
The liquid encapsulated czochralski technique for growing gaas is receiveing considerable attention because it is capable of producing , at reasonable cost , large diameter semi - insulating gaas has a use in the production of gaas integrated circuits , and for this application it must have uniform properties over the whole area of a wafer cut from a grown crystal
目前，液封直拉技术生长gaas单晶获得了广泛关注，因为它能够以合理的成本生产大直径的半绝缘单晶。半绝缘材料是生产集成电路等微电子器件的良好材料，而这种应用就要求整个晶片具有很高的均匀性。
Due to their high aspect ratios and small tip radii of curvature , carbon nanotubes possess marvelous electron field emission properties , viz . low turn - on voltage ( e0 ) and large emission current density ( je ) , and have good potential for using as materials in electron emitters of flat panel display
由于奈米碳管具有极高的纵横比与极小的尖端曲率半径，因此奈米碳管有著超乎常态的电子场发射特性，低的场发射起始电压与大的场发射电流密度，使其为电子场发射平面显示器的良好材料。