锆

Tiny slivers of diamond forged on an infant Earth may contain the earliest traces of life, a study has shown.

经过雕琢地球初期的钻石小薄片，可以见到生命的痕迹。锆石晶体被定年为44亿年前。

Thus wetted the clusters are stuccoed with silica sand or zircon sand.

因此，湿集群是stuccoed与石英砂或锆石砂。

Results The SiO2-ZrO2 composites were calcined at 200℃ prior to sulfating, the concentration of sulfuric acid was 1.0 mol/L ,the molar ratio of Si and Zr was 15, the calcination temperature was 500℃, the molar ratio of ethynol and lactic acid is 3/1, the yield of the ester could reach 92.7%.

结果SO4^2-／SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应适宜的反应条件为：预焙烧温度为200℃，浸泡硫酸浓度为1.0mol／L，硅锆摩尔比为15，焙烧温度为500℃，醇酸比为3时，酯化率可达92.79／6。

In this present work, we have synthesized three types of solid superacid with different structure of molecular sieves by sulfating zirconium silicalite molecular sieves, namely SO〓/Zr-ZSM-5, SO〓/Zr-ZMS-11 and SO〓/Zr-HMS.

本研究中，我们通过硫酸促进锆硅分子筛的方法，合成出了三种具有不同分子筛结构的固体超强酸催化剂，即SO〓／Zr—ZSM—5，SO〓／Zr—ZMS—11和SO〓／Zr—HMS。

The orthogonal experimental design was applied to investigate the effects of zirconia source Zr(NO34·5H2O, ZrOCl2·8H2O,precipitants and sulfating agent (sulfuric acid, ammonium sulfate) on the catalytic performance of the catalysts unde the most superior condition .The catalytic activity was tested in esterification of acetic acid with butanol .

在最优的条件下用正交设计法考察锆源（Zr(NO3)4·5H2O，ZrOCl2·8H2O）、沉淀剂和硫酸化试剂对催化剂性能的影响，并通过乙酸和正丁醇的酯化反应的酯化率检测所制备的SO4/ZrO2催化剂的催化效果。

Zirconia have distinguishing features of refractory (melting point 2710℃),preventing oxidation,lower heat conduction,preventing erosior to the over whelming majority gas,basic and acid material and metal.except strong basic.

抗氧化性能强，导热率低，除强碱性材料外，对大多数气体、酸碱性材料和金属具有很好的抗侵蚀性能，加入适量的稳定剂经电熔稳定处理后制成稳定二氧化锆。

The damping property of piezoelectric IIR filled with PZT piezoelectric ceramic powder and acetylene black was investigated.

探讨填充锆钛酸铅压电陶瓷粉和乙炔炭黑的压电IIR阻尼性能。

Its subject coverage includes: boiling water reactors, light water reactors, heavy water reactors, and pressurized water reactors; steam generator tubing; fuel elements; prediction, detection, monitoring, and control; radiation effects; and stainless steels, zirconium alloys, inconels, and admiralty brass.

它的主题报导包括：沸水反应堆、轻水反应堆、重水反应堆与压水反应堆；蒸汽发生器浴盆；释热元件；预报、探测、监测和控制；辐射作用；不锈钢、锆合金、铬镍铁合金与船用黄铜。

Major operations, agate,, Zircon, Opal, crystal, colorful stones, the Persian Gulf, Burma Jade, bracelet, in addition to operating a variety of silver bracelets, necklaces, bracelets

主要经营，玛瑙，虎眼石，锆石，猫眼石，水晶，五彩石，波斯湾，缅甸玉，手链，另外还经营各种银手镯，项链，手链

Mainly used for precision casting industry ceramsite sand (the Chinese name of it did the "Pearl of Sand""High Aluminum Sand," oil fracturing support, etc.) and used for refractories, abrasives industry white corundum, brown corundum, fused spinel, fused mullite, zirconium mullite, alumina hollow spheres, alumina powder, refractory cement and other products.

主要有用于精密铸造行业的陶粒砂（中文名称又做&宝珠砂&&高铝砂&石油压裂支撑剂等）和用于耐火材料、磨料磨具行业的白刚玉、棕刚玉、电熔尖晶石、电熔莫来石、锆莫来石、氧化铝空心球、氧化铝微粉、耐火水泥等产品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。