unshaped refractory
High-Temperature Mortar
High-temperature mortar is a powdered monolithic refractory bonding material that is mixed with water (or a liquid binder) into a paste for laying refractory bricks, filling brick joints and bonding bricks; after sintering it forms an integral lining together with the refractory bricks.
| Grade | Al₂O₃ Content | Long-term Service Temp. | Typical Applications |
| NJ-40 | ≥40% | 1250℃ | Fireclay refractory bricks, low-temperature flues of boilers |
| NJ-60 | ≥60% | 1400℃ | High-alumina bricks, furnace walls of heating furnaces, rotary kilns and incinerators |
| NJ-70 | ≥70% | 1450℃ | |
| NJ-75 | ≥75% | 1500℃ | |
| NJ-80 | ≥80% | 1550℃ |