Alongside our advanced chromium chemistry and green refractory oxides, YANXA manufactures high-performance synthetic rubbers, functional additives, and metallurgical precursor alloys.
Engineered via high-temperature rotary reduction and precise gas-phase separation, our Eskolaite corundum-structure micro-powders deliver exceptional micro-hardness, chemical inertness, and thermodynamic stability.
Chromium Oxide Green ($Cr_2O_3$), crystallizing in the hexagonal $R\bar{3}c$ space group identical to alpha-corundum ($\alpha\text{-}Al_2O_3$), represents one of the most chemically resilient refractory oxides available to modern industrial engineering. Unlike synthetic transition metal oxides subject to redox degradation, YANXA's chromium oxide powder undergoes precise calcination kinetics, ensuring zero free unreacted chromates and minimal water-soluble salts.
In high-stress thermomechanical systems, the chemical affinity of $Cr_2O_3$ for molten coal slag, aggressive acidic media, and molten glass enables the creation of impervious boundary layers. By optimizing the specific surface area (BET from 2.5 to 14.0 m²/g) and tightly controlling the particle distribution ($D_{10}, D_{50}, D_{90}$), our powders integrate seamlessly into refractory binders, thermal spray coatings, and advanced mechanical polishing suspensions.
| Industrial Grade | Assay (Cr₂O₃ min) | D50 Particle Size | Moisture (max) | Water-Soluble Salts | Typical Applications |
|---|---|---|---|---|---|
| Thermal Spray / APS Grade | 99.2% – 99.7% | 15 – 45 μm | 0.15% | ≤ 0.05% | Anilox rolls, wear-resistant ceramic coatings, pump sleeves |
| Refractory & Gasifier Grade | 99.0% | 1.2 – 3.5 μm | 0.20% | ≤ 0.10% | Coal-water slurry gasification bricks, slag line protection |
| Pigment & Masterbatch Grade | 99.3% | 0.3 – 0.8 μm | 0.15% | ≤ 0.15% | Ceramic glazes, military camouflage coatings, concrete tinting |
| CMP Polishing & Abrasive Grade | 99.5% | 0.2 – 1.0 μm | 0.10% | ≤ 0.03% | Semiconductor CMP, precision metallographic finishing, optical sapphire |
Engineered for mission-critical industrial manufacturing where tribological friction, molten chemical attack, and extreme thermal gradients cause standard metal oxides to fail.
YANXA's agglomerated and sintered chromium oxide feedstocks ensure optimal in-flight melting, high deposition efficiency, and minimal spitting. Thermal spray coatings achieve Vickers hardness above $HV_{0.3} 1100\text{--}1350$, providing impervious microstructures against abrasive slurries in petrochemical pumps, mechanical seals, and flexographic laser-engraved anilox cylinders.
Tribology & Wear ResistantOur micro-fine and sub-micron chromium oxide additions in high-chromia refractory bricks ($Cr_2O_3\text{-}Al_2O_3\text{-}ZrO_2$) dramatically increase corrosion resistance against low-viscosity iron-calcium silicate slags in synthetic gasification units, glass melt furnaces, and hazardous waste incinerators operating above 1,600°C.
Slag Corrosion BarrierMonodisperse crystal habit and controlled agglomeration prevent micro-scratching during chemical mechanical planarization (CMP). Widely adopted for edge-beveling, optical sapphire lenses, hard-disk magnetic heads, and hardened stainless steel alloys demanding nanoscale Ra surface roughness.
Nanoscale Surface FinishingEngineered with precise optical absorption spectra, YANXA pigment-grade chromium green mimics the spectral chlorophyll curve in the solar near-infrared (NIR) spectrum (700–1100 nm). Ideal for tactical coatings, stealth tarpaulins, military defense polymers, and heat-reducing architectural membranes.
Military & Defense FormulationsCompletely non-bleeding under prolonged oxidizing and reducing kiln firings up to 1380°C. Delivers consistent olive-to-emerald shades in structural stoneware, roof tiles, container glass coloring, and high-voltage porcelain electrical insulators without bubbling or thermal decomposition.
Thermal Stability to 1400°CFunctions as a high-efficiency solid acid/base catalyst support or primary active site in industrial dehydrogenation of alkanes, fluorination catalysts for chlorofluorocarbon substitutes, and organic intermediate oxidation with elevated sulfur-poisoning tolerance.
Catalytic SelectivityVertical integration from chemical precursor refining to automated multi-zone calcination guarantees long-term volume scalability and tight batch-to-batch repeatability.
Our rotary kilns are equipped with distributed control systems (DCS) monitoring 48 thermal zones in real-time. Infrared optical pyrometry maintains temperature variance within ±2.5°C at 1,250°C, eliminating raw unreacted material and ensuring consistent crystalline Eskolaite habit across every production campaign.
Integrated Malvern Mastersizer laser diffraction and automated air-classifier systems monitor particle sizing continuously. Real-time feedback automatically fine-tunes grinding mill velocities, maintaining ultra-narrow particle dispersion with process capability indexes ($C_{pk} \ge 1.45$).
Operating from dedicated chemical production parks in China, YANXA maintains direct control over precursor sodium dichromate and ammonium salts. This upstream integration insulates international buyers from raw-material price volatility and global supply chain bottlenecks.
Advancing chromium oxide material science toward near-zero trace hexavalent chromium, carbon-neutral thermal processing, and specialized additive manufacturing powders.
Proprietary closed-loop post-calcination reduction pathways bring water-soluble hexavalent chromium (Cr VI) residues down to below 1 ppm, surpassing upcoming REACH Annex XVII tightening.
Plasma-spheroidization R&D yielding perfectly spherical Cr₂O₃ micro-beads for ceramic direct ink writing (DIW) and additive binder-jetting in extreme-temperature space thrusters.
Pilot-scale conversion of natural gas tunnel kilns to renewably-generated green hydrogen firing, cutting Scope 1 industrial carbon emissions by up to 68% across our oxide synthesis lines.
Colloidal and surface-modified chromium oxide nanoparticles (d50 < 80nm) designed for transparent UV-blocking optical nanocomposites and high-toughness technical polymer matrices.
Navigating cross-border trade with full regulatory compliance. From UN-certified packaging to ISO 9001 lot traceability and dedicated technical sales engineering.
Our trivalent Chromium (III) Oxide is fully REACH registered for direct importation into European economic areas. Comprehensive 16-section GHS-compliant Safety Data Sheets (SDS), RoHS 3 testing certificates, and SVHC non-detectable audit trails accompany every commercial shipment.
Every production batch undergoes analytical testing by ICP-OES (inductively coupled plasma optical emission spectrometry), X-ray fluorescence (XRF), and laser diffraction sizing. Batch COAs reflect verified analytical data, not generic nominal values. Independent third-party inspection (SGS, Intertek) is supported.
Multi-wall kraft paper bags (25 kg) with polyethylene moisture barriers, 1,000 kg antistatic bulk super sacks, or vacuum-sealed steel drums. Non-hazardous for international maritime (IMDG) and air (IATA) transport under CAS 1308-38-9, with prompt export dispatch through Qingdao, Tianjin, and Shanghai ports.
Answers covering chemical differentiation, handling safety, particle engineering, and international shipping protocols.
Complementary product lines engineered with the same quality standards as our chromium oxide materials.
Our technical sales team provides tailored support for powder metallurgy, thermal spray, refractories, and specialty polymer formulations. Contact us to receive full technical data packages and sample evaluations.
