Potassium hexatitanate whiskers (PTW) materials have attracted much attention in thermal insulation fields. Nevertheless, the low mechanical properties limited the development and application of PTW thermal insulation materials. In this work, low density, high mechanical properties and high thermal insulation capacity of PTW thermal insulation materials can be obtained through mesocarbon microbeads (MCMB) adopted as pore-forming agent. The pyrolysis and oxidation of MCMB promoted the development of whiskers during the calcination process, rendering the increased materials porosity. The as-prepared PTW materials heat treated at 1000°C possessed low thermal conductivity of 0.043-0.035 W.m⁻¹.K⁻¹ from room temperature to 900°C and a low bulk density of 0.52 g.cm⁻³. Owing to the point of contact between whiskers with developed diameter and aspect ratio, comperssive strength of PTW materials heat treated at 900° and 1000°C was 1.92 and 2.51 MPa, respectively, maintaining high resilience rates of above 70% at 5% compressive strain. The elevated heat-treatment temperature (above 1100°C) led to the sintering between whiskers and the resultant enhanced compressive strength of higher than 4.23 MPa. The researched low density, high mechanical properties and thermal insulation PTW materials exhibit huge prospects as insulation linings in thermal insulation fields.

六钛酸钾晶须（PTW）材料在保温隔热领域备受关注。然而，低力学性能限制了PTW保温材料的开发和应用。在这项工作中，通过采用中间碳微珠（MCMB）作为造孔剂，可以获得低密度、高力学性能和高隔热能力的PTW保温材料。MCMB的热解和氧化促进了煅烧过程中晶须的形成，使材料孔隙率增加。所制备的 PTW 材料在 1000°C 热处理，从室温到 900° C 具有 0.043-0.035 Wm ^-1 .K ^-1的低热导率和 0.52 g.cm ^{-3的低体积密度}. 由于晶须之间的接触点具有发达的直径和纵横比，PTW 材料在 900° 和 1000°C 热处理的抗压强度分别为 1.92 和 2.51 MPa，在 5% 压缩应变下保持 70% 以上的高回弹性. 升高的热处理温度（高于 1100°C）导致晶须之间的烧结，从而提高了高于 4.23 MPa 的抗压强度。所研究的低密度、高机械性能和隔热的PTW材料在隔热领域作为隔热衬里具有巨大的前景。