图为不同液体石蜡添加量时所得二氧化钛凝胶微球的TG-DTA曲线。从图中可知，随着液体石蜡添加量的增加，粉体呈现了不同的热行为。在未添加液体石蜡所得粉体的DTA曲线中，有一处115℃ 的吸热峰。而此处吸热峰与TG曲线中30~200 ℃ 间的失重相联系，推测应当是源于粉体中剩余水的蒸发。而DTA曲线中255 ℃ 处的放热峰，同样伴随了TG曲线中的失重，推测此处放热峰及相应失重应当归因于凝胶结构的燃烧。粉体中残留的丁氧基团以及正辛醇在此温度下分解并产生大量氧气，从而加速了凝胶的燃烧过程。DTA曲线中于500 ℃ 附近的第二个放热峰同样伴随了一定的失重，其失重比率约为2%。这可能是由于残余有机物的分解。而根据添加液体石蜡所得粉体的TG曲线可知，在升温过程中，所得粉体相比未添加液体石蜡所得粉体失重更大。而在其DTA曲线中，出现了两处放热峰。第一处放热峰在300^oC附近，并且伴随了一定的失重。这一处放热峰应当归因于二氧化钛凝胶微球的燃烧过程。而第二处放热峰约位于400 ℃ 附近，根据其峰强随液体石蜡添加量的增加而增大的趋势判断，此处放热放应当是由二氧化钛凝胶微球中的液体石蜡的燃烧造成的。在添加液体石蜡所得粉体的DTA曲线中，未见图所示的位于500 ℃ 附近的放热峰，这也进一步暗示了添加液体石蜡前后所得粉体不同的热行为。

The figure shows the TG-DTA curve of titanium dioxide gel microspheres with different amounts of liquid paraffin.  It can be seen from the figure that with the increase of the amount of liquid paraffin, the powder presents different thermal behavior.  In the DTA curve of the powder obtained without adding liquid paraffin, there is a heat absorption peak of 115 ℃ .  The heat absorption peak here is related to the weight loss between 30 and 200 ℃ in the TG curve, which is speculated to be due to the evaporation of the remaining water in the powder.  The exothermic peak at 255 ℃ in the DTA curve is also accompanied by the weight loss in the TG curve, and it is speculated that the exothermic peak and the corresponding weight loss here should be attributed to the combustion of the gel structure.  The residual butoxide group and n-octanol in the powder decompose at this temperature and produce a large amount of oxygen, thus accelerating the combustion process of the gel.  The second exothermic peak near 500℃ in the DTA curve is also accompanied by a certain weight loss, with a weight loss ratio of about 2%.  This may be due to the breakdown of residual organic matter.  According to the TG curve of the powder with liquid paraffin added, it can be seen that the weight loss of the powder obtained is greater than that of the powder without liquid paraffin added during the heating process.  In the DTA curve, there are two exothermic peaks.  The first exothermic peak is around 300oC and is accompanied by a certain amount of weightlessness.  This exothermic peak should be attributed to the combustion process of titania gel microspheres.  The second exothermic peak is about 400℃ , and according to the trend that its peak strength increases with the increase of the amount of liquid paraffin, the exothermic release here should be caused by the combustion of liquid paraffin in the titanium dioxide gel microspheres.  In the DTA curve of the powder obtained by adding liquid paraffin, there is no exothermic peak near 500℃ as shown in the figure, which further implies the different thermal behavior of the powder obtained before and after adding liquid paraffin.