T/BYXT 143-2025 Rare earth modified high elastic modulus basalt fiber

Scope

This document specifies the terms and definitions, classification and marking, technical requirements, test methods, inspection rules, and packaging, labeling, transportation, and storage for rare earth-modified high elastic modulus basalt fibers. This document applies to all types of rare earth-modified high elastic modulus basalt fibers products that are produced in accordance with the requirements of T/BYXT 141 and are designed to meet the process control requirements of T/BYXT 142. 5. Technical Requirements 5.1 Basic Performance The basic performance of RE-BF shall comply with the provisions of Table 2. Table 2 Indicator Requirement Test Method Elastic Modulus Comply with the requirements of the corresponding grade in Table 1 6.2 Tensile Strength ≥3000 MPa 6.2 Elongation at Break ≥2.5% 6.2 Diameter Deviation ±0.5 μm of the nominal diameter value 6.3 5.2 Rare Earth-Modified Properties The rare earth-modified properties of RE-BF shall comply with the provisions of Table 3. Table 3 Indicator Requirement Test Method Total Rare Earth Content (La2O3 + Y2O3) 1.0%-3.0% 6.4 Grain Boundary Strengthening Factor (GBF) ≥2.5 6.5 Rare Earth Distribution Uniformity (CV of Surface Scanning Concentration) ≤8.0% 6.5 5.3 Environmental Resistance The ability of RE-BF to maintain its performance under specified environmental conditions shall comply with the provisions of Table 4. Table 4 Condition Performance Maintenance Requirement Test Method Wet Heat Aging: (85±2)℃, (85±5)% RH, 1000h Elastic modulus decrease rate ≤5% 6.6.1 Acid Resistance: (5.0±0.1)% hC solution, (25±2)℃, 24h Mass loss rate ≤0.3% 6.6.2 High Temperature Exposure: (800±10)℃ in air, 1h Elastic modulus retention rate ≥85% 6.6.3

Development Information

Related Standards