The compressive strength and flexural strength with the same strength class cement mortar of the alkali-resistant glass fiber cement mortar were tested in standard and hot-water curing condition, and the damage mechan...The compressive strength and flexural strength with the same strength class cement mortar of the alkali-resistant glass fiber cement mortar were tested in standard and hot-water curing condition, and the damage mechanism of alkali-resistant glass fiber was studied. The interaction mechanisms of the chemical erosion and physical injury in different curing conditions were studied in order to summarize the damage mechanism of alkali-resistant glass fiber in cement-based materials, and chloride diffusivity coefficient and porosity of cement mortar were tested in the different curing conditions. The experimental results are that the strength of cement based materials and fiber cement slurry interface zone were closely related, and heat curing could accelerate the hydration of cement, but inevitably enlarge the defect.展开更多
1,3-Propanediol is a promising renewable resource produced by microbial production. It is mainly used in many synthetic reactions, particularly applied to the polymer synthesis and cosmetics industry. We described her...1,3-Propanediol is a promising renewable resource produced by microbial production. It is mainly used in many synthetic reactions, particularly applied to the polymer synthesis and cosmetics industry. We described here the isolation of strain ZH-1, which has the ability of high production with 1,3-propanediol, from Fenhe River in China. It was classified as a member of K. pneumoniae after the study of phenotypic, physio-logical, biochemical and phylogenetic (16S rDNA). The initial glycerol concentration, fermentation time and pH value of strain ZH-1 were determined to be 50 g·L<sup>-1</sup>, 36 h and 8.0. Under these conditions, the practical yield of 1,3-PD was 18.53 g·L<sup>-1</sup> and a molar yield (mol<sub>1,3-PD</sub> mol<sub>Glycerol</sub>-1</sup> of 1,3-propanediol to glycerol of 0.497. In addition, we found that for the strain ZH-1, the optimum grown pH was 9.0, so we can deter-mine that it is a new member of alkali-resistant strains.展开更多
The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the ...The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the corroding tem-perature, time and solution concentration on the rate of reac-tion and the degree of corrosion were investigated; effects of the apparent activation energy and the experimental value of frequency factor on the rate constant were discussed.展开更多
以钾长石、石英、方解石、高岭土等为主要原料,采用传统方法制备了耐碱中温日用瓷透明生料釉,探讨了烧成温度与保温时间对釉面效果及热稳定性的影响。采用正交试验法对配方进行了优化,得出了性能良好的最优配方。对样品进行了光泽度、...以钾长石、石英、方解石、高岭土等为主要原料,采用传统方法制备了耐碱中温日用瓷透明生料釉,探讨了烧成温度与保温时间对釉面效果及热稳定性的影响。采用正交试验法对配方进行了优化,得出了性能良好的最优配方。对样品进行了光泽度、热稳定性、热膨胀系数、耐碱性、XRD等测试分析。结果表明:最优配方样品的光泽度为116,热膨胀系数α为7.2×10^(-6)/℃(室温~600℃),抗热震性为170~20℃热交换一次不开裂,耐碱性达到欧盟BS EN 12875-2:2006标准中评价分级的0级;样品的物相组成为玻璃相,没有明显的晶相存在。展开更多
基金Funded by the National Natural Science Foundation of China(Nos.51009015and50872015)the Education Foundation of Liaoning Province(No.L2010038)
文摘The compressive strength and flexural strength with the same strength class cement mortar of the alkali-resistant glass fiber cement mortar were tested in standard and hot-water curing condition, and the damage mechanism of alkali-resistant glass fiber was studied. The interaction mechanisms of the chemical erosion and physical injury in different curing conditions were studied in order to summarize the damage mechanism of alkali-resistant glass fiber in cement-based materials, and chloride diffusivity coefficient and porosity of cement mortar were tested in the different curing conditions. The experimental results are that the strength of cement based materials and fiber cement slurry interface zone were closely related, and heat curing could accelerate the hydration of cement, but inevitably enlarge the defect.
文摘1,3-Propanediol is a promising renewable resource produced by microbial production. It is mainly used in many synthetic reactions, particularly applied to the polymer synthesis and cosmetics industry. We described here the isolation of strain ZH-1, which has the ability of high production with 1,3-propanediol, from Fenhe River in China. It was classified as a member of K. pneumoniae after the study of phenotypic, physio-logical, biochemical and phylogenetic (16S rDNA). The initial glycerol concentration, fermentation time and pH value of strain ZH-1 were determined to be 50 g·L<sup>-1</sup>, 36 h and 8.0. Under these conditions, the practical yield of 1,3-PD was 18.53 g·L<sup>-1</sup> and a molar yield (mol<sub>1,3-PD</sub> mol<sub>Glycerol</sub>-1</sup> of 1,3-propanediol to glycerol of 0.497. In addition, we found that for the strain ZH-1, the optimum grown pH was 9.0, so we can deter-mine that it is a new member of alkali-resistant strains.
文摘The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the corroding tem-perature, time and solution concentration on the rate of reac-tion and the degree of corrosion were investigated; effects of the apparent activation energy and the experimental value of frequency factor on the rate constant were discussed.
文摘以钾长石、石英、方解石、高岭土等为主要原料,采用传统方法制备了耐碱中温日用瓷透明生料釉,探讨了烧成温度与保温时间对釉面效果及热稳定性的影响。采用正交试验法对配方进行了优化,得出了性能良好的最优配方。对样品进行了光泽度、热稳定性、热膨胀系数、耐碱性、XRD等测试分析。结果表明:最优配方样品的光泽度为116,热膨胀系数α为7.2×10^(-6)/℃(室温~600℃),抗热震性为170~20℃热交换一次不开裂,耐碱性达到欧盟BS EN 12875-2:2006标准中评价分级的0级;样品的物相组成为玻璃相,没有明显的晶相存在。
