树脂基摩擦材料普遍存在热衰退问题，探索解决摩擦材料的热衰退问题一直是摩擦材料研究的热点。无机黏结剂具有承受高温的特点，有望替代树脂黏结剂成为摩擦材料用黏结剂的材料。采用硅酸盐作为黏结剂，丁腈橡胶为韧性改良组分，采用热压成型工艺制备了摩擦材料。研究了硅酸盐种以氢氧化镁和二氧化碳为原料，采用加压碳化法制备碱式碳酸镁。考察了二氧化碳分压、反应温度、搅拌转速和反应时间对碱式碳酸镁颗粒形貌影响，同时探究了碱式碳酸镁微观结构对其视比容的影响。采用扫描电子显微镜、X射线衍射仪、热分析仪对产物的形貌、物相和热分解做了表征。结果表明：二氧化碳分压为0.6 MPa、反应温度为90 ℃、搅拌转速为200 r/min、反应时间为2 h得到的碱式碳酸镁为大小均匀、片层交叉堆积的规则球体，其视比容最高为10.54 mL/g。类及用量、橡胶含量对摩擦材料冲击韧性和摩擦磨损性能的影响，借助扫描电子显微镜（SEM）观察摩擦材料磨损表面的形貌并分析磨损机理。结果表明：钠钾比（物质的量比）为2∶1的混合硅酸盐制备的摩擦材料基体间的结合力较强，综合性能最优；适当含量的硅酸盐可以为摩擦材料提供较好的强度和韧性，并且可以实现摩擦材料的摩擦系数在全部测试温度范围内的平缓稳定，有效地改善了摩擦材料的抗热衰退性能；适量橡胶的加入可以提高摩擦材料的冲击韧性。

Basic magnesium carbonate was prepared by pressured carbonization method using magnesium hydroxide and car bon dioxide as raw materials.The effects of CO2 partial pressure，reaction temperature，stirring speed and reaction time on the morphology of basic magnesium carbonate were investigated.Meanwhile the influence of microstructure of basic magnesium carbonate on its apparent specific volume was studied. Morphology，phase and thermal decomposition of the product were characterized by SEM，XRD and TG -DSC.Results showed that the optimized condition was as follows：partial pressure of CO2 was 0.6 MPa，reaction temperature was 90 ℃，stirring speed was 200 r/min and reaction time was 2 h.Under the optimal con ditions，basic magnesium carbonate was prepared as a regular sphere with uniform size and cross stacked layers.The maximum apparent specific volume of basic magnesium carbonate reached to 10.54 mL/g.