High temperature flexural strength (strength) refers toZirconium oxide ceramics(Chemical formula: ZrO2, Raw material: non-metallic mineral) material, the ultimate folding stress that the unit (unit) cross section can withstand at high temperatures. It represents Zirconium oxide ceramicThe material’s ability to resist bending moments at high temperatures. High temperature flexural strength (strength) and It is called high temperature folding strength or high temperature fracture modulus. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles and narrow particle size distribution. There are many methods for preparing ultra-fine zirconia powder. The main purification methods of zirconia include Chlorination and thermal decomposition methods, alkali metal oxidative decomposition methods, lime fusion methods, plasma arc methods, precipitation methods, colloid methods, hydrolysis methods, spray pyrolysis methods, etc. Measure a cuboid of a certain size at high temperature The maximum load that the specimen can bear when being bent on a three-point bending device, and the flexural strength can be calculated as follows:
R=3.W.l /2.b.d2 Where R——Flexural strength, Pa;
W——The maximum force applied during fracture (fracture) Load, N;
l——distance between two points, cm;< br />
b——Width of the specimen, cm;
d——Thickness of the sample, cm.
Zirconia ceramic plunger
The high-temperature strength of fireproof materials (Material) is closely related to its actual use. Especially for evaluating the quality of alkaline direct bonded bricks, high-temperature flexural strength is a very important performance. For example, the high-temperature flexural strength of alkaline direct-bonded bricks is strong, and the shear stress generated by temperature gradients is strong, so the products are less likely to peel off during use. Products with high high-temperature flexural strength will also increase the impact and wear resistance of their materials (a basic type of component failure) and enhance slag resistance. Therefore, high-temperature flexural strength is used as an indicator of product strength. Zirconium oxide ceramicZrO2(raw material: non-metallic mineral)High temperature flexural strength index, It mainly depends on the chemical mineral composition, organizational structure and production process of the product.
