Abstract Na2Ti6O13 whiskers were prepared by a molten salt method using Na2CO3, TiO(OH)2 as raw materials and NaCl as the salt. The effects of the calcining temperatures, weight ratios of salt/reactant, and the molar ratios of Na2CO3/TiO(OH)2 on the morphology and phase composition of the products were investigated. The results showed that single-phase Na2Ti6O13 whiskers can be synthesized from a mixture of Na2CO3, TiO(OH)2 and NaCl when calcined at 900 °C for 3 h. We also proposed a synthetic mechanism. Moreover, the thermal conductivity of the Na2Ti6O13 was 0.729 W/(m.k) and the reflectivity among 500–1500 nm of the synthesized Na2Ti6O13 whiskers reached 90%, and have relatively high reflectivity from 350 nm to 400 nm, which indicated that Na2Ti6O13 was a highly reflective energy-saving material.

中文翻译：

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Na2Ti6O13晶须的可控制备及其在UV-VIS-NIR中的高反射率

摘要 以Na2CO3、TiO(OH)2为原料，NaCl为盐，采用熔盐法制备Na2Ti6O13晶须。研究了煅烧温度、盐/反应物重量比和Na2CO3/TiO(OH)2摩尔比对产物形貌和相组成的影响。结果表明，将 Na2CO3、TiO(OH)2 和 NaCl 的混合物在 900 °C 下煅烧 3 h，可以合成单相 Na2Ti6O13 晶须。我们还提出了一种合成机制。此外，Na2Ti6O13 的热导率为 0.729 W/(mk)，合成的 Na2Ti6O13 晶须在 500-1500 nm 范围内的反射率达到 90%，并且在 350-400 nm 范围内具有较高的反射率，这表明 Na2Ti6O13 是一种高反光节能材料。