Continuous preparation process of high-purity magnesium oxide particles
By employing a continuous composite precipitation, hydrothermal crystallization, and gradient calcination process, the problem of unstable quality in the preparation of high-purity magnesium oxide has been solved, resulting in magnesium oxide particles with high purity, uniform particle size, and high thermal stability, suitable for high-end electronic devices, high-end ceramics, and optical materials.
Patent Information
- Application Number
- CN202610933319.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-26
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2046-06-26
AI Technical Summary
Existing high-purity magnesium oxide preparation processes suffer from large batch-to-batch variations, unstable product quality, and difficulty in meeting the requirements of continuous mass production. Furthermore, impurity removal is incomplete, and thermal stability and density are insufficient, failing to meet the requirements of high-end applications.
A continuous composite precipitation, hydrothermal crystallization, and gradient calcination process is adopted to generate a uniform basic magnesium carbonate precursor through a composite precipitant. Combined with countercurrent washing and airflow classification, the purity and particle regularity of the product are improved. Gradient calcination matches the thermal decomposition kinetics of the precursor to ensure the thermal stability of the product.
Magnesium oxide particles with high purity (≥99.95%), uniform particle size (1.8-2.1μm), low impurities (2.1-4.2ppm) and high thermal stability (0.04%-0.08% thermal weight loss) have been achieved, making them suitable for applications in high-end electronic devices, high-end ceramics and optical materials.