Tunable properties of (HoY)SiO as damage self-monitoring environmental/thermal barrier coating candidates.

RESiO with low thermal conductivity, compatible thermal expansion coefficients and excellent high-temperature reliability in harsh environments are excellent candidates as advanced environmental/thermal barrier coating materials for high-efficiency gas turbine engines. A series of rare earth silicates (HoY)SiO are designed and their properties are comprehensively investigated in this paper. Through doping Ho into YSiO, the thermal conductivity of YSiO is significantly decreased and the thermal expansion coefficient is also optimized closer to Si-based ceramics.

[Characteristics and Source Apportionment of Volatile Organic Compounds in the Rainy Season of Guangzhou City].

Atmospheric volatile organic compounds (VOCs) were measured in an urban area of Guangzhou on July 2016 using an on-line gas chromatography mass spectrometry/fire ion detector. Seventy-three VOCs were detected with an average concentration of (118.83±79.

[HONO Pollution Characteristics and Nighttime Sources During Autumn in Guangzhou, China].

Nitrous acid (HONO) plays an important role in atmospheric photochemistry processes because its photolysis provides an efficient source of hydroxyl (OH) radicals in the troposphere. However, few studies exist on HONO in nocturnal chemistry processes. Using the observation data of HONO and related parameters for a super site at Guangzhou Jinan University in October 2015, the pollution processes and sources of HONO during nighttime were analyzed in this study.