逐渐升高温度
Gradually increase the temperature
以上为机器翻译结果，长、整句建议使用 人工翻译 。
达到烧结后，试样的常温强度随基质中莫来石含量的减少逐渐降低，高温荷重软化温度逐渐升高。
After the specimens were sintered, with the decrease of the content of mullite in matrix the bend strength decreased, but the refractoriness under load increased.
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