以下为句子列表：
英文: Experiments show the optimum content of pyrophyllite and dolomite is 30%; in contrast to original bond, the refractory point of bond is reduced by 55℃, the average coefficient of thermal expansion is reduced by 30% and flexural strength and shock strength
中文: 通过实验发现：叶蜡石和白云石最佳含量为30%，与原结合剂相比，结合剂耐火度降低了55℃，平均热膨胀系数降低了30%，磨具抗折强度提高了27%，磨具抗冲击强度提高了22%。
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英文: The studies indicate that different content of pyrophyllite and dolomite can cause the following three cases: (1) making the refractory point decrease linearly and, to some extent, influencing the microstructure and properties of sintered body; (2) accele
中文: 同时，也不同程度地影响了磨具烧结体的微观结构和性能；(2)可促进在烧结过程中莫来石的形成，降低结合剂的热膨胀系数，加强了结合剂与磨料的匹配性，提高了磨具的抗折强度和抗冲击强度；(3)在一定温度范围内还可防止碳化硅磨具出现黑心现象，拓宽了碳化硅磨具的烧结温度适应范围。
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