| 摘要 |
The invention relates to chemical technology, namely to the methods of producing magnetic laminate, which can be used as magnetic dielectric in radio engineering, adsorbent and matrix for application of medicines. Novelty of the method is the fact that after drying evacuation is performed under the pressure of 1.3-13 Pa, additional heating at a temperature of 110-500 ºC and thermal treatment, which is conducted in a atmosphere of argon or in the vacuum under the pressure of 1.3 (10-3-10-1) Pa and temperature of 400-500 ?С, silicon alkoxide is used as a modifying agent and it is hydrolyzed in the solution of alcohol and water prior to addition at synthesis. In the case the mass of obtained layer of silicon oxide on the surface of magnetite makes 12.3- 50,0 % of total mass of magnetic material. Technical result: improvement of the quality due to increase of heat resistance, specific magnetism, increase of specific surface area and decrease of impurity content, for example, such as NaO, NaSiО, AlO. |
