JM23, JM26, and JM28 mullite bricks are high-performance lightweight refractory insulation materials widely used in various industrial high-temperature equipment. Covering different temperature resistance ranges, these three standard grades serve as ideal thermal lining solutions for kilns, industrial furnaces, boilers and heat treatment systems. Featuring low thermal conductivity, light weight, excellent thermal shock resistance and stable high-temperature performance, JM series mullite bricks are globally recognized as premium refractory materials to reduce energy consumption and extend furnace service life.
Each JM grade is engineered for specific working temperatures to fit diverse industrial scenarios. JM23 mullite bricks work steadily at temperatures up to 1260°C. With ultra-light density and superior thermal insulation, they are widely adopted for back lining and insulation layers of medium and low-temperature furnaces, effectively minimizing heat loss, shortening heating cycles and improving overall energy efficiency.
JM26 mullite bricks support continuous operation at 1430°C, striking an optimal balance between thermal insulation and mechanical strength. Resistant to frequent temperature fluctuations and structural cracking, this versatile grade is extensively used in ceramic tunnel kilns, industrial heating furnaces and petrochemical thermal equipment. It stands out as the most cost-effective choice for most medium-to-high temperature insulation projects.
Designed for extreme working conditions up to 1540°C, JM28 mullite bricks are the top-tier high-temperature solution. With higher alumina content and superior refractoriness, they deliver outstanding high-temperature stability, slag erosion resistance and structural rigidity, making them ideal for high-temperature ceramic kilns, glass furnace regenerators and metallurgical furnace linings.
All JM23, JM26 and JM28 mullite insulation bricks possess core advantages including low heat storage, low thermal expansion, excellent alkali resistance and strong anti-oxidation performance. Compared with traditional heavy refractory bricks, they greatly reduce furnace load, cut operational energy costs and lower equipment maintenance frequency.
We supply standard and custom-sized JM series mullite bricks with strict quality inspection, consistent batch performance and competitive factory pricing. Professional grade selection guidance is available based on your actual furnace temperature, working environment and project demands.
If you are sourcing reliable mullite bricks for new furnace construction or refractory lining replacement, feel free to send us an inquiry. We will provide free technical datasheets, accurate quotations and tailored logistics solutions within 24 hours.
Post time: Jul-03-2026
