1.物理特性
1. Physical properties
1）相对密度
1) Relative density
在常用的白色颜料中，二氧化钛的相对密度最小，同等质量的白色颜料中，二氧化钛的表面积最大，颜料体积最高。 [3]
Among the commonly used white pigments, the relative density of titanium dioxide is the smallest. Among the white pigments of the same quality, the surface area of titanium dioxide is the largest and the volume of pigments is the highest. [3]
2）熔点和沸点
2) Melting and Boiling Points
由于锐钛型在高温下会转变成金红石型，因此锐钛型二氧化钛的熔点和沸点实际上是不存在的。只有金红石型二氧化钛有熔点和沸点，金红石型二氧化钛的熔点为1850℃、空气中的熔点为(1830±15)℃、富氧中的熔点为1879℃，熔点与二氧化钛的纯度有关。金红石型二氧化钛的沸点为为(3200±300)℃，在此高温下二氧化钛稍有挥发性。 [3]
The melting and boiling points of anatase titanium dioxide are virtually non-existent because the anatase type will change into rutile type at high temperature. Only rutile type titanium dioxide has melting point and boiling point. The melting point of rutile type titanium dioxide is 1850 C, the melting point in air is 1830 (+15)C, and the melting point in oxygen enrichment is 1879 C. The melting point is related to the purity of titanium dioxide. The boiling point of rutile-type titanium dioxide is (3200 300). At this high temperature, titanium dioxide is slightly volatile. [3]
3）介电常数
3) Dielectric constant
由于二氧化钛的介电常数较高，因此具有优良的电学性能。在测定二氧化钛的某些物理性质时，要考虑二氧化钛晶体的结晶方向。锐钛型二氧化钛的介电常数比较低，只有48。
Titanium dioxide has excellent electrical properties because of its high dielectric constant. In determining some physical properties of titanium dioxide, the crystallization direction of titanium dioxide crystal should be considered. The dielectric constant of anatase titanium dioxide is relatively low, only 48.