Posts

Lapped and Polished Aluminum Nitride Substrates

By -
Image
INNOVACERA supplies ground, lapped and polished aluminum nitride (AlN) substrates for thin-film circuits, laser diode submounts, photonics and precision metallization. Thermal conductivity we provided is 170, 200 and 230 W/m·K, with master sizes up to 138 × 190 mm. For applications requiring a fine surface, precision polishing is available down to Ra ≤ 0.05 μm, with custom sizes, thickness,and slots available. AlN substrate surface finish can be selected according to the downstream process. INNOVACERA provides grinding, fine lapping, polishing and precision polishing, together with custom thicknesses, dimensions and machining features for different application requirements. Product Specification Specification Capability Material Aluminum nitride (AlN) Thermal conductivity 170 / 200 / 230 W/m·K Thickness 0.38 / 0.55 / 0.635 mm standard, others on request Thickness tolerance ±0.05 mm typical Common sizes 50.8 × 50.8, 100 × 100, 114.3 × 114.3, 120 × 120 mm, customized size is available. L...
Post a Comment
Read more

BN Crucibles, Setter Plates and Supports: What Are Their Roles in AlN Ceramic Processing?

By -
Image
  Aluminum nitride (AlN) ceramics undergo multiple thermal processing steps from raw powder synthesis to high-temperature sintering. These processes rely heavily on the internal furniture and fixtures of high-temperature vacuum or atmosphere furnaces. Depending on workpiece geometry and thermal cycles, different ceramic structures—including crucibles, setter plates, support blocks, and electrical insulators—are required inside the hot zone.   Boron nitride (BN) exhibits exceptional thermal shock resistance, excellent electrical insulation, high sublimation temperatures, and a very low coefficient of thermal expansion (CTE). Crucially, BN does not wet or easily react with most molten materials and nitride green bodies. However, each furnace component serves a distinct mechanical and thermal role: crucibles hold loose materials, setter plates provide planar support for flat substrates, fixtures maintain multi-layer stacking, and insulators isolate high-voltage heating circuits....
Post a Comment
Read more

Magnesium-Stabilized Zirconia Ceramic Nozzles for Metal Refining and Continuous Casting

By -
Image
In modern metal refining and continuous casting, ceramic components play a critical role in maintaining production efficiency, improving melt purity, and extending equipment service life. Among the advanced engineering ceramics used in severe metallurgical environments, Magnesium-Stabilized Zirconia (MSZ) is recognized for its exceptional thermal shock resistance, chemical corrosion resistance, and high-temperature mechanical strength.   Engineered as wear-resistant and anti-erosion flow control components, zirconia ceramic nozzles withstand the most demanding conditions in molten metal handling: Extreme operating temperatures exceeding 1,600 ° C Severe thermal shock during casting start-up and tundish preheating Chemical corrosion and scouring from aggressive slags and deoxidizers Mechanical erosion and cavitation caused by high-velocity molten metal streams   These combined characteristics make MSZ nozzles a reliable choice for critical flow control in continuous steel cast...
Post a Comment
Read more