Abstract

Evaluating the quality of refractory materials is one of the important stages of production before these materials are handed over to the customer. One of the required parameters is to evaluate ultrasonic pulse velocity, as determined by measurements performed via the ultrasonic pulse method. Are presents findings on the influence of the direction of transmission and the natural frequency of transducers on ultrasonic pulse method measurements of silica refractory bricks. The findings reveal that the measurement requirements specified in standards for other building materials cannot be fully applied in the case of silica refractory bricks, and the assumption that ultrasonic pulse velocity increases with shorter measuring bases is not confirmed. The highest ultrasonic pulse velocities were measured during transmission across the width of the product, while the lowest velocities were measured over the thickness of the sample. In order to evaluate the quality of silica refractory bricks, it is necessary to unambiguously determine a uniform measuring base for transmission so as to ensure the reproducibility of the measurements performed by different laboratories.

中文翻译：

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超声波脉冲法检测硅质耐火砖过程中传输方向和传感器固有频率的影响

摘要

评估耐火材料的质量是这些材料交付给客户之前的重要生产阶段之一。所需的参数之一是评估超声波脉冲速度，这是通过超声波脉冲方法进行的测量确定的。Are 介绍了关于传输方向和换能器的固有频率对硅质耐火砖的超声波脉冲方法测量的影响的发现。研究结果表明，其他建筑材料标准中规定的测量要求不能完全适用于硅质耐火砖，并且超声波脉冲速度随测量基数变短而增加的假设没有得到证实。在跨越产品宽度的传输过程中测量了最高的超声波脉冲速度，而最低速度是在样品厚度范围内测量的。为了评价硅质耐火砖的质量，必须明确确定一个统一的透射测量基准，以保证不同实验室测量的可重复性。