河南某地粘土矿物新型传压介质研制及金刚石合成工业试验

发布时间：2018-03-18 17:06

  本文选题：粘土　切入点：传压介质　出处：《人工晶体学报》2017年08期 　论文类型：期刊论文

【摘要】：河南某地粘土矿物具有优异的传压和密封性能,是传统金刚石合成用传压介质辅料叶蜡石的替代品。将该粘土矿物按照粗(-1.4 mm+0.5 mm)、中(-0.5 mm+0.25 mm)、细(-0.25 mm)三个粒级进行配比,重量比为4∶4∶2,并添加5%水玻璃作为粘结剂,混合均匀,作为密封材料。白云石按照粗(-0.18 mm+0.15 mm)、细(-0.15 mm)两个粒级进行配比,重量比为8∶2,添加8%水玻璃,混合均匀,作为传压材料。经粉压成型和焙烧热处理,制成传压层在内部,密封层在外部,外形尺寸为65 mm×65 mm×32.5 mm,内径为38.5 mm的分体型复合传压介质。经金刚石合成工业试验得出,金刚石产品单产量为116.0 ct,≥130 N颗粒含量为28.0%,≥40/60目颗粒含量为77.5%,单位锤耗为0.28 g。该新型传压介质的使用性能跟常规叶蜡石传压介质相当,合成出的金刚石产品两者之间没有明显差异。
[Abstract]:The clay mineral in a certain area of Henan Province has excellent pressure transfer and sealing performance, and is a substitute for pyrophyllite, an auxiliary material for the traditional pressure transfer medium for diamond synthesis. The clay mineral is proportioned according to three grained grades: coarse -1.4 mm 0.5 mm ~ (-1) mm ~ (-1) mm ~ (-1) mm ~ (0.5) mm ~ (25) mm ~ (-1) -0. 25 mm ~ (-) ~ (-). The weight ratio is 4: 4: 2, and 5% sodium silicate is added as binder, mixed evenly and used as sealing material. Dolomite is proportioned according to the size of coarse -0.18mm 0.15mm, fine-grained stone. The weight ratio is 8: 2, and 8% sodium silicate is added, and the mixture is even. As a pressure transfer material, the pressure transfer layer is made by powder pressing forming and calcination heat treatment, the pressure transfer layer is inside, the sealing layer is outside, the shape dimension is 65 mm 脳 65 mm 脳 32.5 mm, and the inner diameter is 38.5 mm. The single output of diamond products is 116.0 ct, the content of grain 鈮，

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