alumina boats

Description :

Alumina 99.8% Labware and Tubes Material: Our 99.8% Alumina labware is crafted from a premium grade of Alumina, sourced directly from ALCOA in Germany. Manufacturing Process: These labwares are produced using slip casting and pressure casting techniques, with meticulous attention to maintain the highest quality. Grain Size: The sintered grain size ranges between 2-4 microns. Dimensional Tolerance: We maintain a tolerance of ±1mm for dimensions up to 50mm, and ±2mm for dimensions above 50mm. Typical Chemical Composition of ALCOA Powder (Sintered Product): Al2O3: 99.8% (99.8%) SiO2: 0.015% (0.05%) MgO: 0.04% (0.08%) Na2O: 0.03% (0.03%) Fe2O3: 0.015% (0.015%) CaO: 0.01% (0.03%) Testing and Standards: All data is based on ANTS' standard test methods, with typical values reflecting actual production averages. Sintered Density: The sintered density is above 3.9 g/cc, exceeding 98% theoretical density (3.96 g/cc). Lustre and Color: Using submicron Alumina powder from ALCOA, we achieve a special vitreous lustre, an ivory color, and a translucent appearance in our high-purity Alumina labware. Chemical Resistance: Solubility in boiling HF is 0.1% by weight after three hours. In boiling HCl, H2SO4, and NaOH, solubility is less than 10^-3% by weight after 12 hours. Thermal Shock Resistance: The rate of temperature change should not exceed 150°C/hr. Maximum Operating Temperature: The labware can be used at temperatures up to 1750°C without load. Usage Considerations: Alumina is compatible with ultra-high vacuum environments but forms low-temperature eutectics with compounds of Bismuth, Lead, Silicon, Tin, Antimony, and rare earths. Therefore, avoid using Alumina wares to heat-treat these compounds together. Recommended Applications: Our 99.8% Alumina labwares are ideal for high-temperature operations that require contamination-free results. They are highly refractory and suitable for use in reducing and oxidizing atmospheres, inert in hydrogen and carbonaceous environments, and offer strong resistance to alkalis and fluxes. They are also perfect for glass melting, including borosilicate glass. Physical Properties of 99.8% Alumina Labware: Density: > 3.85 g/cc Porosity: < 0.5% Flexural Strength: 379 MPa Elastic Modulus: 375 GPa Shear Modulus: 152 GPa Bulk Modulus: 228 GPa Poisson's Ratio: 0.22 Compressive Strength: 2600 MPa Tensile Strength (250°C): 275 MPa Hardness: 1440 Kg/mm² Thermal Conductivity: 35 W/mK Coefficient of Thermal Expansion: 8.4 × 10^-6/°C Specific Heat: 880 J/KgK Dielectric Strength: 16.9 AC - KV/mm Dielectric Constant @1MHz: 9.8 Dissipation Factor @1KHz: 0.0002 These specifications ensure that our 99.8% Alumina labware and tubes deliver superior performance in demanding laboratory and industrial environments.