一种低膨胀系数的汽油机颗粒捕集器及其制备方法
本发明公开了一种低膨胀系数的汽油机颗粒捕集器及其制备方法,属于汽油机尾气排放治理技术领域。本发明将无机原料、造孔剂、粘结剂和粉体电中性改性剂混合之后加水拌合成泥,经过练泥、挤出成型、干燥、烧结,得到陶瓷基体,再经过陶瓷基体两端交叉堵孔得到颗粒捕集器;其中,无机原料由滑石、高岭土、熔融石英粉、α‑氧化铝、镁铝双氢氧化物组成。本发明使用的合成镁铝双氢氧化物完全替代或者部分替代活性氧化,可以直接大幅降低陶瓷基体的热膨胀系数,提高颗粒捕集器的抗热震性。
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