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本文比较了晶态ＳｉＯ＿２和无定形ＳｉＯ＿２的性质。结果表明，无定形ＳｉＯ＿２的溶解度大于α－石英。在ｐＨ＞３的范围内，ＳｉＯ＿２粒子表面带负电荷，α－石英粒子表面ξ电位高于无定形ＳｉＯ＿２粒子，ＥＳＲ谱表明，α－石英晶体被研磨后，粉尘粒子表面产生了自由基，而研磨无定形ＳｉＯ＿２则无自由基产生。α－石英粉尘粒子表面ξ电位大，粒子表面存在自由基与它的细胞毒性大是相一致的。
This article compares the properties of crystalline SiO 2 and amorphous SiO 2. The results show that amorphous SiO 2 is more soluble than α-quartz. In the range of pH> 3, the surface of SiO_2 particles is negatively charged, and the zeta potential of α-quartz particles is higher than that of amorphous SiO_2 particles. The ESR spectrum shows that the α-quartz crystal is ground and free radicals are generated on the surface of dust particles Grinding amorphous SiO 2 is free radical generation. α-quartz dust particle surface zeta potential, particle surface free radicals and its cytotoxicity is consistent.