硼

First we found some limitation lying in the chemical metathesis, especially in the controlling of the quality of the product and the velocity of the reaction. In the following research, we did some comparison experiment of synthesizing various nickel boride nanocrystal in the same principle, but by the two methods respectively.

另外，在试验过程中，我们逐渐发现了化学交换法的局限性，尤其在对反应进程和反应产物质量的控制方面的缺陷，并进一步通过分别用两种方法合成纳米硼化镍颗粒，合成原理相同，但反应产物相应发生较大变化。

The preparation of ternary boride hard alloy cladding layer on steel substrate is studied.

研究采用铸渗法制备三元硼化物硬质合金覆层钢基材料。

The rates of oxidation loss of graphite electrodes with and without boride impregnation were compared through testing in a simulating furnace.

采用硼化物溶液浸渍石墨电极，测试不同浸渍量的试样在模拟炉中氧化失重率、物理性能及表面形态。

T-300 carbon fibers were treated with boride by three methods of electrochemical anodic oxidation, soaking and coating, and subsequent graphitized at 2500℃.

通过阳极氧化、溶液浸渍和胶液涂层三种方法对原料T-300型碳纤维进行硼处理，然后在2500℃石墨化。

Hot-pressing micro-grain boron carbide materials are used in the control system of space navigation. So they are required to be extremely reliabile.

热压微晶碳化硼材料是用于宇航控制系统的材料，对其可靠性要求极高。

East Electricity Transformer Manufacturing Co., Ltd. are the Northeast's largest electric transformer suppliers, products widely used in metallurgy, boron carbide manufacturing and other fields.

东电变压器制造有限公司是东北地区最大的电炉变压器供应商，产品广泛应用在冶金、碳化硼制造等领域。

When the boron carbide specimens are polished, some of them have bright points on the surface. It is an abnormal phenomenon.

有些热压微晶碳化硼材料研磨面上有宏观可见的白色斑点，这是一种异常现象。

The results of first principles calculations show that the carbon content limit in boron carbide crystal is 53 at%, which is consistent with the experimental value.

更多 at％范围变化，第一性原理研究结果表明，碳化硼中含碳量可能的极限为53%，与实验观测结果一致。

The invention belongs to the nuclear technical field, in particular relating to a method for making a graphite absorption ball containing boron carbide.

本发明属于核技术领域，特别涉及一种制备含碳化硼的石墨吸收球的方法。

Its main products are: diamond, cubic boron nitride, ultrafine Carbide Tool, cutting non-ferrous metal, black metal, composite wood, stone and other materials there are more than 20 series over 100 varieties tool.

其主要产品有：金刚石、立方氮化硼、超细硬质合金刀具、切削有色金属、黑金属、复合木材、石材等材料共有20多个系列100多个刀具品种。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。