Method for quantifying crystallization temperature upper limit through basalt melt viscosity mutation

Abstract

The invention relates to a method for accurately quantifying a crystallization temperature upper limit through basalt melt viscosity mutation, which comprises the following steps of: preparing a sample, melting and homogenizing, testing the viscosity of the sample to obtain a viscosity-temperature curve, and fitting the viscosity and the temperature: selecting a high-temperature section with a certain length on the viscosity-temperature curve by taking the highest temperature as a starting point, an exponential function model: eta (T) = eta 0 + A * exp (R0 * T) is adopted for fitting the viscosity-temperature correlation, a viscosity-temperature fitting curve is prolonged, and the abscissa of an inflection point C where the viscosity-temperature curve and the fitting curve are separated is the crystallization temperature upper limit TC. According to the method, accurate determination of the upper limit of the crystallization temperature of the basalt melt through sudden change of the high-temperature viscosity of the basalt melt is proposed for the first time, the technical problem that accurate determination of the upper limit of the crystallization temperature of the melt is lacked in the field of continuous basalt fiber preparation is solved, and an important reference is provided for reasonable setting of the wire drawing temperature.

Description

technical field [0001] The invention relates to the key technical field of continuous basalt fiber production and preparation, in particular to a method for accurately quantifying the upper limit of the crystallization temperature through sudden changes in the viscosity of basalt melt. Background technique [0002] Continuous basalt fiber is made of volcanic rocks such as basalt and andesite as raw materials. After mechanical grinding and continuous high-temperature melting, it is quickly drawn from high-temperature-resistant platinum-rhodium alloy bushings. Its strength, performance and corrosion resistance far exceed glass fiber. , is a green and environmentally friendly fiber material that meets the national strategic needs. Since the production process of basalt fiber is restricted by many technical parameters, the process becomes extremely complicated. Among them, the upper limit of the crystallization temperature is the most important technical parameter, which is mai...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for accurately quantifying the upper limit of the crystallization temperature through sudden changes in the viscosity of the basalt melt, so as to solve the problem that the technical error in the measurement of the upper limit of the crystallization temperature of the basalt melt is very large, and there is often a mismatch between the drawing temperature and the upper limit of the crystallization temperature, resulting in Defects of reduced mechanical properties or even broken wires

Images