硼具有催化石墨化作用。
除了变质程度以外，原岩的类型和碳的原始物质的种类也会影响碳的石墨化作用。
Besides metamorphic grade, the nature of original rocks and the precursor of carbonaceous material may also influence graphitization.
钛的质量分数低于0.10%时，显示石墨化作用；超过0.10%时则显示出稳定碳化物作用。
The titanium of content less than0.10%has graphitization effect, it, however, will have carbide stabilization effect when its content is more than0.10%.
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