查询词典 formaldehyde

The resonant peak shifted towards longer wavelength with the increasing volume fraction of methanol,ethanol,propyl alcohol,acetone and formaldehyde with high sensitivities and linear relations.

结果表明，谐振波长随甲醇、乙醇、丙醇等醇类化合物，以及丙酮、甲醛等蒸气体积分数的上升而向长波方向移动，具有高的灵敏度，且两者基本呈线性关系。

LaCr_(1-x)M_xO_3(M=Co, Fe, Ni, Sn, Ti)and LaNi_(1-x)Ti_xO_3 compounds were synthesized by sol-gel technique in this paper. The thick film based sensors were fabricated and their gas-sensing properties were tested in the acetone, ethanol, normal propyl alcohol, carbinol, formaldehyde gases etc.

本文采用柠檬酸盐溶胶-凝胶法合成了LaCr_(1-x)M_xO_3(M=Co，Fe，Ni，Sn，Ti)和LaNi_(1-x)Ti_xO_3系列化合物的纳米粉体，并制备了厚膜型气敏元件，在丙酮、乙醇、正丙醇、甲醇、甲醛等有机气体中测试了它们的气敏性能。

Following are summary of our works:(1)The powders of LaCr_(0.9)Co_(0.1)O_3, LaCr_(0.9)Fe_(0.1)O_3, LaCr_(0.9)Ni_(0.1)O_3, LaCr_(0.95)Sn_(0.05)O_3 and LaCr_(1-x)Ti_xO_3(x=0.0-0.3) were single perovskite phase with orthorhombic structure. The gas-sensing properties of their thick film sensors were tested in the acetone, ethanol, normal propyl alcohol, carbinol and formaldehyde organic gases. The sensitivity of the sensors can not be enhanced effectively by doping Co、Fe、Ni、Sn elements in B-site of LaCrO_3. Ti dopant with proper concentration can greatly improve the gas-sensing properties, which make the sensor display higher sensitivity and quicker response-recovery characteristics.

所得结果摘要如下：(1)LaCr_(0.9)Co_(0.1)O_3、LaCr_(0.9)Fe_(0.1)O_3、LaCr_(0.9)Ni_(0.1)O_3、LaCr_(0.95)Sn_(0.05)O_3和LaCr_(1-x)Ti_xO(来源：ABfd1dC论文网www.abclunwen.com)_3(x=0.0-0.3)粉体为正交单相钙钛矿结构，其厚膜型气敏元件在350℃时对丙酮、乙醇、正丙醇、甲醇、甲醛等有机气体的气敏性能测试表明：0.1mol Co、Fe、Ni和0.05mol Sn元素在LaCrO_3的B位进行掺杂后，不能有效提高材料对以上测试气体的气敏性能；而Ti元素的适量掺杂可以极大地改善LaCrO_3的气敏性能，使之显示出对丙酮气体的高灵敏度和快速响应恢复能力。

Main types of indoor air pollution for formaldehyde, benzene caused by chemical pollution, biological pollution caused by bacteria and viruses radioelement and dust caused by the physical pollution.

室内空气污染类型主要为甲醛、苯引起的化学污染、由细菌病毒引起的生物污染及由放射性元素和尘埃引起的物理污染。

Measured data show that the normal decoration, decoration 5 months, the concentration of formaldehyde can be lower than 0.1 mg / cubic meter; 7 months after the decoration can be reduced to 0.08 mg / cubic meter below.

实测数据说明，一般正常装修的情况下，室内装修5个月后，甲醛的浓度可低于0.1毫克／立方米；装修7个月后可降至0.08毫克／立方米以下。

Molar ratio of formaldehyde/phenol is one of important factors that affect the thermal properties of Resole resins and the mechanical properties of glassfiber-reinforced resins.

原料甲醛／苯酚比是影响Resole树脂固化产物热性能和玻纤复合材料力学性能的重要参数之一。

Carbon xerogels with high electrical conductivity were prepared with resorcin / formaldehyde via ambient drying technology and were characterized by XRD and four-probe electrical conductivity measurement.

以间苯二酚/甲醛为反应物，采用常压干燥工艺制备了高电导率的炭气凝胶，并用 XRD 和四探针电导率测试仪对其进行了表征。

Phenolic-doped melamine-formaldehyde aerogels were investigated by adding resorcin to MF sol before the formation of crosslink. The solvents in wet gel were then exchanged with ethanol.

以三聚氰胺和甲醛为原料制备MF气凝胶，在凝胶化过程中加入酚类化合物对MF体系进行改性，获得相应的湿凝胶，湿凝胶经超临界干燥，制备出密度为最低可达50 kg·m-3的酚改性MF气凝胶。

The effect of ethanol, urea-formaldehyde resin, melamine and flame retardant of resistance to water and fire was studied.

研究了乙醇、脲醛树脂、三聚氰胺和阻燃剂对涂料耐水、阻燃性能的影响。

Moreover, its light weight, easy handling, non-toxicity, no formaldehyde make itself, instead of the traditional glass wool and rock wool, your ideal choice.

另外，高性能保温、吸音棉质量轻、易操作，无毒，不含甲醛，是玻璃棉、岩棉等传统保温、降噪材料的理想替代品。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。