Large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic materials, preparation method and application thereof
AssigneeShanghai Institute of Ceramics, Chinese Academy of Sciences
InventorsYing Chen, Xianlin Dong, Wenbin Zhang, Xin Li, Feng Jiang, Ye Huang
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Abstract
The present application relates to a large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic material, a preparation method and application thereof. The composition of the titanium oxide based dielectric ceramic material comprises: a CaTiO3+b SrTiO3+c TiO2+d Al2TiO5+e SiO2, wherein a, b, c, d, and e are the mole percentage of each component, 15≤a≤35 mol %, 0≤b≤2 mol %, 30≤c≤84 mol %, 0.5≤d≤25 mol %, 0.5≤e≤15 mol %, and a+b+c+d+e=100 mol %.
Claims8
A large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic material, a composition of the titanium oxide based dielectric ceramic material comprising:
- a CaTiO3+b SrTiO3+c TiO2+d Al2TiO5+e SiO2,
- wherein a, b, c, d, and e are a mole percentage of each component, 15≤a≤35 mol %, 0≤b≤2 mol %, 30≤c≤84 mol %, 0.5≤d≤25 mol %, 0.5≤e≤15 mol %, and a+b+c+d+e=100 mol %.
A method for preparing a large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic material having a composition of a CaTiO3+b SrTiO3+c TiO2+d Al2TiO5+e SiO2, wherein a, b, c, d, and e are a mole percentage of each component, 15≤a≤35 mol %, 0≤b≤2 mol %, 30≤c≤84 mol %, 0.5≤d≤25 mol %, 0.5≤e≤15 mol %, and a+b+c+d+e=100 mol %, comprising the steps of:
- weighing and mixing a calcium source, a titanium source, a strontium source, a silicon source and an aluminum source according to the composition, and presintering the mixture to obtain mixed powders;
- adding a binder to the mixed powders, and subjecting the mixture to spray granulation and press molding to obtain a green body;
- sintering the green body at 1220 to 1350° C. to obtain the large-size, high-dielectric breakdown strength titanium oxide based dielectric ceramic material.
Dependencies are inferred from the claim text.