查询词典 lead oxide

From 500℃ to 550℃, the oxide scale presents a relatively compact morphology, the oxidational wear is the principal wear mechanism and the wear rate is very slow at 500℃ owing to the anti-friction effect of the oxide scale.

本文研究了5CrNiMo在400℃、500℃、550℃及600℃温度下的滑动磨损行为，利用扫描电镜，波谱仪及X射线衍射仪对磨损面形貌及成分进行了分析，结果表明：5CrNiMo钢磨损机制随温度的变化而变化，400℃时表现为疲劳剥落和磨粒磨损，500℃至550℃时表现为氧化磨损，600℃时主要是粘着磨损。

When this hydroxamate-xanthate collectorsystem used to float another highly siliceous pelitic copper oxide ore,a copperconcentrate of 25% Cu can be obtained with recovery of 85% for free copper oxide.

自由氧化铜回收率≥85%，选择合适的调整剂及相应的流程结构更有利于羟肟酸-黄药&混合剂&在Cu-Fe共生难选养化矿浮选中发挥最佳效用，不仅可以得到品位达36%的优质铜精矿。

The dust around PG 2112+059 contains large quantities of rock-forming minerals, including crystalline forms of silica, a form of aluminium oxide called corundum (better known on Earth as the principal ingredient of rubies and sapphires) and a form of magnesium oxide called periclase.

PG 2112+059类星体周围的尘埃含有大量形成岩石的矿物，包括硅晶石，被称作刚玉的铝氧化物（更为通俗易懂的说法是红宝石和蓝宝石的主要成分），以及镁氧化物——方镁石。

Test results show that the shear strength parameters of the fly ash with high calcium oxide content can make a notable change due to pozzolanic action and frost and thaw cycles, but for the fly ash with low calcium oxide content this phenomenon is not very obvious,and the influence of the frost and thaw cycles can be neglected.

试验结果表明，高氧化钙含量的粉煤灰的强度指标受上述两种作用的影响显著；低氧化钙含量的粉煤灰的强度指标在凝硬作用下也有所提高，但基本不受冻融作用的影响；干贮粉煤灰的渗透系数受凝硬和冻融作用的影响较小。

In order to discuss the regioselectivity of nitrile oxide 1,3-dipolar cycloaddition to propyne , 1,3-dipolar cycloaddition reaction of substituted nitrile oxide (RCNO, R=F, NO2, OCH3, OH, COOCH3, CHO, CONH2, H, CH3) with propyne was studied using density functional theory at the 6-311++G** level, and the reaction rates were calculated at different temperature from 200 to 400 K.

用密度泛函B3LYP/6-311++G**方法研究了氧化腈(RCNO，R=F，NO2，OCH3，OH，COOCH3，CHO，CONH2，H，CH3)与丙炔的1，3-偶极环加成反应，并且计算了不同温度下的反应速率常数，讨论了氧化腈上不同取代基R的取代效应和温度对反应区域选择性的影响。

The results show that there is a kind of oxide wear at medium temperature and the oxide wear is important to the semimetallic friction material.

结果表明，中温下半金属刹车材料的氧化对摩擦磨损性能起着较为重要的作用，中温下的氧化磨损为其主要的磨损机理。

The increase of the conductivity of PAn/whisker composite is caused by the intrinsic properties of NaFe〓P〓, and the decrease of PAn/skutterudite nanowire results of the iron oxide sheath of the nanowires, iron oxide particles in the powder, and a large amount of boundaries in the nano-composite.

晶须复合材料电阻率的升高与填充型磷基方钴矿的本征性能有关，纳米复合材料电导率的降低可能与纳米棒表的氧化铁层及产物中的氧化铁有关，另外大量的相界也是其电导率降低的原因之一。

The diastolic function of sphincter of Oddi is impaired by hypercholesterolemia and the sphincter of Oddi is in a spasmic state, which may be caused by the hypercholesterolemia-related abnormal response to nitric oxide or the decreased activity of nitric oxide.

原因可能与高胆固醇改变了细胞膜的生物学特性致胆道口括约肌对一氧化氮的反应异常或者与降低、抑制了一氧化氮的活性有关。

With the quick development of glass electric melting technology, glass electric melting furnace have higher requirement to tin oxide electrode from the early density to subsequent electric performance. Recently, the research in toughing of ceram boosted the progress of stannic oxide electrode, especially in toughing.

随着玻璃电熔技术的快速发展，玻璃电熔炉对二氧化锡电极的电极要求越来越高，从早期的致密度到后来的电学性能，近期，随著陶瓷增韧方面的发展，对其力学性能特别是强韧性提出了新的要求。

With the quick development of glass electric melting technology, glass electric melting furnace have higher requirement to tin oxide electrode from the early density to subsequent electric performance. Recently, the research in toughing of ceram boosted the progress of stannic oxide electrode, especially in toughing.

随着玻璃电熔技术的快速发展，玻璃电熔炉对二氧化锡电极的电极要求越来越高，从早期的致密度到后来的电学性能，近期，随着陶瓷增韧方面的发展，对其力学性能特别是强韧性提出了新的要求。

The second is to cut a mere 100 calories from your diet , which is the equivalent of a tablespoon of butter.

第二个就是从你的饮食中减少一百卡路里，只是相当于一大汤匙的黄油。

This is where the Rorschach test comes in.

现在，罗氏测试就出现了。