Mullite Sand for Precision Casting
Overview
Mullite Sand for Precision Casting is a specialized refractory material derived from high-purity mullite (3Al2O3·2SiO2). It is engineered for investment casting processes where dimensional accuracy and thermal stability are critical. This synthetic material outperforms natural silica sands due to its near-zero thermal expansion above 1000°C, making it ideal for aerospace, turbine blade, and dental prosthesis casting applications where mold stability at extreme temperatures is required.
Physical and Chemical Properties
Mullite sand exhibits exceptional thermal properties including a melting point of ~1850°C and thermal conductivity of 3.5-5.5 W/m·K. Its unique needle-like crystal structure provides mechanical strength to ceramic molds during metal pouring. Chemically inert, it resists reaction with most molten metals (including superalloys) and maintains stability in both oxidizing and reducing atmospheres. The typical bulk density ranges from 1.6-1.8 g/cm³ when used in foundry applications.
Main Applications
Primary use is in investment casting shells for high-value components like jet engine turbine blades, where its low thermal expansion prevents shell cracking during metal pouring. Also used for ceramic cores in hollow turbine blade manufacturing. Other applications include refractory linings for furnaces handling molten aluminum or steel, and as filler material in high-temperature insulation products. The automotive industry utilizes it for precision casting of turbocharger components.
Safety and Storage
Although non-toxic, fine mullite dust requires handling with NIOSH-approved N95 respirators. Implement dust control measures during sieving or mixing operations to prevent respiratory irritation. Store in moisture-proof packaging to prevent hydration. Bulk containers should be kept on pallets in covered warehouses. Shelf life is indefinite if kept dry, but batches should be tested for moisture absorption if stored beyond 12 months.
B2B Procurement Guide
Key specifications to verify: Al2O3 content (≥72%), SiO2 content (≤28%), Fe2O3 impurities (<0.5%), and median grain size (typically 70-200 mesh for investment casting). Request thermal shock resistance test data (cycles to failure at 1100°C water quench) and XRD analysis confirming mullite phase purity. For large orders, consider regional suppliers to minimize logistics costs (major producers are in China, Germany, and the USA).
Related Manufacturers
- 主营：远红外陶瓷粉、麦饭石、赤铁粉、莫来砂、橡胶粉、钙粉、电气石、方解石、玻璃轻石、石英砂、白云石、硅微粉、铁粉、高岭土、滑石粉、轻质碳酸钙、膨润土、圆粒砂、染色彩砂、水洗石、浴沙、沸石、猫砂、珍珠岩、云母、火山石
- 主营：磁粉、铁粉、铁砂、莫来砂、硅藻土、膨润土、轻钙、重钙、氢氧化钙、氧化钙、煅烧滑石粉、膨润土颗粒、硅灰、活性白土、萤石粉、石英粉、高岭土、沸石粉、煅烧高岭土、珍珠岩粉、玻璃粉、贝壳粉、远红外粉、凹凸棒土
- 主营：蛭石、海泡石、矿物纤维、莫来砂、防火涂料、漂珠、石油焦、石墨颗粒、云母粉、火山球、重钙、滑石粉、轮胎粉、钾长石、叶腊石、氧化铝、碳酸钙
- 主营：石墨、膨胀石墨、导电石墨粉、高铝莫来砂、防静电墨粉、阻燃石墨粉、鳞片石墨粉、超细石墨粉、云母、云母片、茶色云母片、云母粉、电气石、电气石粉、电气石颗粒、天然云母片、透明云母片、导热石墨、绝缘云母片、耐高温云母、云母板、岩片、贝壳片、膨润土、钙基膨润土、纳基膨润土
- 主营：陶瓷管、镁质瓷、耐磨陶瓷、莫来砂、耐火陶瓷、陶瓷垫片、多孔陶瓷、陶瓷零件、陶瓷座配件、陶瓷绝缘管、堇青石陶瓷、氧化铝陶瓷、钛酸铝陶瓷、氧化锆陶瓷、莫来石陶瓷、电子陶瓷材料、工业电子陶瓷
- 主营：莫来砂、滑石粉
- 主营：铝矾土、铝矾土粉、高铝粉、莫来砂、铸造涂料用粉、莫来石、莫来石粉、棕刚玉、白刚玉、石英粉、耐火砖、耐火泥、耐火浇注料、耐火材料、铝矾土砂、蠕变黏土砖、白刚玉细粉、莫来石刚玉、精铸砂、精铸粉
- 主营：玻璃粉、火山石粉、云母粉、铸造莫来砂、云母片、电气石粉、陶瓷砂、石英粉、莫来石粉、硅酸铝粉、轻钙粉、珍珠岩颗粒、透明粉、铝矾土、重钙粉、煅烧高岭土、蛭石、玻璃鳞片、煅烧贝壳粉、硅灰石粉、高硅滑石粉、低硅滑石粉、全加密硅灰、半加密硅灰
- 主营：滑石粉、宝珠砂、脱硫石膏、莫来砂、活性白土、重钙粉、轻钙粉、玻璃鳞片、沸石粉、配重砂、石英砂、膨润土粉、硅灰粉、硅藻土、膨润土颗粒、地坪材料、碳酸钙、萤石粉、珍珠岩
- 主营：硅藻土、碳酸钙、铁砂、莫来砂、金刚砂、铁粉、氢氧化钙、氧化钙、滑石粉、煅烧滑石粉、膨润土、黄土红土、硅灰、活性白土、石英粉、高岭土、煅烧高岭土、沸石粉、珍珠岩粉、贝壳粉、凹凸棒土、远红外粉、玻璃粉、萤石粉
- 主营：铁砂、铁粉、重钙、莫来砂、轻钙、氧化钙、白水泥、滑石粉、膨润土、红土黄土、硅灰、硅藻土、活性白土、萤石粉、石英粉、重晶石粉、高岭土、沸石粉、珍珠岩粉、膨润土猫砂、赤铁粉、粉煤灰、锰砂、石英砂
- 主营：变压器鹅卵石、石英砂、火山石、莫来砂、彩色石子、鹅卵石滤料、夜光石、黑色金刚砂、黑色砾石、白色石子、地坪五彩石、烘干砂、贝壳粉、重钙粉、轻钙粉、石英粉、滑石粉、煅烧高岭土、水洗石、水磨石子、五彩石、黑白石英砂、抛光鹅卵石、人工挑选鹅卵石、滤料火山岩、膨润土
- 主营：轻质碳酸钙、4A沸石粉、膨润土、莫来砂、重晶石粉、配重铁粉 铁砂、氢氧化钙、红陶土 黄陶土、木粉、麦饭石粉、沸石粉、煅烧高岭土、水洗高岭土、滑石粉、负离子粉、硅藻土、白云石粉、玻璃鳞片、高铝耐火粉、蓝晶石粉
- 主营：岩片、染色岩片、蛭石、莫来砂、云母、石英砂、雨花石、染色云母、机制炭、烧烤炭、白云石、石子、五彩石
- 主营：玻璃鳞片、煅烧高岭土、叶腊石、莫来砂、膨润土、滑石粉、铝矾土、硅灰、萤石粉、沉淀硫酸钡、重钙、轻钙、硅藻土、珍珠岩、玻璃微珠、重晶石粉、S95矿粉、透明粉、玻璃砂、云母粉、木炭、硅酸铝粉、长石粉、玻璃粉、贝壳粉