采用正硅酸乙酯(TEOS)、氧氯化锆(ZrOCl2.8H2O)和钛酸丁酯(TBT)为前躯体,以无水乙醇(EtOH)为溶剂通过溶胶-凝胶法制备以SiO2作为干凝胶主组分的SiO2-TiO2-ZrO2干凝胶。研究了多元干凝胶的溶胶-凝胶法制备技术、干凝胶改性技术以及各种制备工艺参数的影响规律。当原料比m(氧氯化锆)∶m(钛酸丁酯)∶m(氨水)∶m(TEOS)∶m(EtOH)=1∶2.7∶5.0∶16.7∶106.7时,经过水解、老化及溶剂替换后,制得气孔率约85%,比表面积190～210 m2/g,孔径6～30 nm,粒子直径小于20 nm,导热系数可达到0.0857 W.m-1.K-1的SiO2-TiO2-ZrO2干凝胶。 (TEOS), zirconium oxychloride (ZrOCl2.8H2O) and butyl titanate (TBT) were used as precursors and SiO2 was used as the solute by using ethanol (EtOH) SiO2-TiO2-ZrO2 xerogel as the main component of xerogel. The effects of sol-gel process, xerogel modification technology and various preparation process parameters on multivariable xerogel were studied. When the raw material ratio m (zirconium oxychloride): m (butyl titanate): m (ammonia): m (TEOS): m (EtOH) = 1: 2.7: 5.0: 16.7: 106.7, after hydrolysis, aging and After the solvent was replaced, the porosity was about 85%, the specific surface area was 190-210 m2 / g, the pore size was 6-30 nm, the particle diameter was less than 20 nm, the thermal conductivity could reach 0.0857 Wm-1.K- ZrO2 xerogel.