1. High Purity: Typically composed of over 99% alumina, ensuring minimal contamination during use. 2. Thermal Stability: With a melting point exceeding 1700°C, alumina boats can withstand extreme temperatures without deforming or melting. 3. Chemical Inertness: Resistant to most acids and alkalis, making them suitable for holding a variety of substances. 4. Mechanical Strength: Alumina's high hardness and strength make these boats durable and resistant to wear. 5. Electrical Insulation: Excellent electrical insulator, useful in environments where electrical properties are critical.