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Method for improving dielectric property of MgTiO3-based microwave dielectric ceramic
The invention discloses a method for improving the dielectric property of MgTiO3-based microwave dielectric ceramic. The method comprises the following steps: carrying out supercritical oxidation treatment on the MgTiO3-based microwave dielectric ceramic by adopting supercritical fluid; a solvent in the supercritical fluid is CO2, and a solute in the supercritical fluid is H2O2; h2O2 molecules are infiltrated into the MgTiO3 series dielectric ceramic through a supercritical fluid technology,-OH groups in the H2O2 molecules react with Ti atom dangling bonds on oxygen vacancy defect positions to form Ti-OH coordinated covalent bonds, then two-OH groups in oxygen vacancies form H2O molecules to be separated out, oxygen atoms are left to fill the oxygen vacancies, and the dielectric property is greatly improved.
本发明公开了一种提高MgTiO3基微波介质陶瓷介电性能的方法，采用超临界流体对MgTiO3基微波介质陶瓷进行超临界氧化处理；所述超临界流体中的溶剂为CO2，超临界流体中的溶质为H2O2；通过超临界流体技术使H2O2分子渗入MgTiO3系介电陶瓷中，H2O2分子中的‑OH基团与氧空位缺陷位置上Ti原子悬挂键发生反应形成Ti‑OH配位共价键，随后氧空位中2个‑OH基团形成H2O分子析出并留下氧原子填补了氧空位，大幅提升介电性能。
Method for improving dielectric property of MgTiO3-based microwave dielectric ceramic
The invention discloses a method for improving the dielectric property of MgTiO3-based microwave dielectric ceramic. The method comprises the following steps: carrying out supercritical oxidation treatment on the MgTiO3-based microwave dielectric ceramic by adopting supercritical fluid; a solvent in the supercritical fluid is CO2, and a solute in the supercritical fluid is H2O2; h2O2 molecules are infiltrated into the MgTiO3 series dielectric ceramic through a supercritical fluid technology,-OH groups in the H2O2 molecules react with Ti atom dangling bonds on oxygen vacancy defect positions to form Ti-OH coordinated covalent bonds, then two-OH groups in oxygen vacancies form H2O molecules to be separated out, oxygen atoms are left to fill the oxygen vacancies, and the dielectric property is greatly improved.
本发明公开了一种提高MgTiO3基微波介质陶瓷介电性能的方法，采用超临界流体对MgTiO3基微波介质陶瓷进行超临界氧化处理；所述超临界流体中的溶剂为CO2，超临界流体中的溶质为H2O2；通过超临界流体技术使H2O2分子渗入MgTiO3系介电陶瓷中，H2O2分子中的‑OH基团与氧空位缺陷位置上Ti原子悬挂键发生反应形成Ti‑OH配位共价键，随后氧空位中2个‑OH基团形成H2O分子析出并留下氧原子填补了氧空位，大幅提升介电性能。
Method for improving dielectric property of MgTiO3-based microwave dielectric ceramic
一种提高MgTiO3基微波介质陶瓷介电性能的方法
LI HAO (author) / LIU FEI (author) / LIU SHAOJUN (author) / WANG TAO (author)
2024-09-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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