Hot Pressed Boron Nitride
Hot Pressed Boron Nitride
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DOI：
10.1021/ie50552a039
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发表时间：
1955-12
影响因子：
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通讯作者：
K. M. Taylor
中科院分区：
文献类型：
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作者：
K. M. Taylor
本文介绍了一种热压自结合氮化硼坯体。坯体外观呈狼吞虎咽状，平均氮化硼含量约为97%，密度约为2.1克/立方厘米。在晶体结构、机械加工和润滑性能方面，它类似于石墨。此外，与石墨一样，它的性质也表现出方向性，表明片状晶体相对于形成压力的方向是部分取向的。它在室温下比石墨强得多，但在1000摄氏度时略弱于石墨。与石墨不同的是，它的电阻率很高。它在700摄氏度的空气中稳定，在700-1000摄氏度的空气中只缓慢氧化。在700摄氏度的氯气中，它的重量损失很小，能抵抗一些腐蚀性液体，不被熔融的玻璃弄湿。
This paper describes a self-bonded boron nitride body made by hot pressibg. The body has an ivorylike appearance with an average boron nitride content of about 97% and a density of about 2.1 grams per cubic centimeter. In crys-talline structure and machining and lubricating properties it resembles graphite. Also, like graphite, it shows directionalism in its properties, indicating partial orientation of the platelike crystals with respect to direction of forming pres-sure. It is much stronger at room temperature but somewhat weaker at 1000 C. than graphite. It has high electrical resistivity unlike graphite. It is stable in air to 700 C. and oxidizes only slowly from 700 to 1000 C. It has low weight loss in chlorine at 700 C., is resistant to some corrosive liquids, and is not wet by molten glass.