Monolithic base and production method therefor
AssigneeNGK Insulators, Ltd.
InventorsMasahiro Furukawa, Ryotaro Yoshimura
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Abstract
The monolithic base is a porous alumina body that includes pores and that is configured by alumina particles as an aggregate and an oxide phase as a binding material. The alumina particles include microscopic alumina particles having a particle diameter of greater than or equal to 0.5 μm and less than or equal to 5 μm and coarse alumina particles having a particle diameter of greater than 5 μm. The number of microscopic alumina particles that are encapsulated in the oxide phase is greater than or equal to 50% of the total number of microscopic alumina particles and coarse alumina particles.
Claims14
A monolithic base comprising pores and configured by alumina particles as an aggregate and an oxide phase as a binding material, wherein
- the alumina particles include microscopic alumina particles having a particle diameter of greater than or equal to 0.5 μm and less than or equal to 5 μm and coarse alumina particles having a particle diameter of greater than 5 μm,
- the number of microscopic alumina particles that are encapsulated in the oxide phase is greater than or equal to 50% of the total number of microscopic alumina particles and coarse alumina particles.
A method of manufacturing a monolithic base comprising:
- forming a green body for a monolithic base having a plurality of pores and configured by an oxide phase starting material powder as a binding material and an alumina particle powder as an aggregate, and
- firing the green body, wherein
- a Dg50 of the alumina particle powder is greater than or equal to 5 μm to less than or equal to 40 μm,
- a Dg10 of the alumina particle powder is less than or equal to 10(z−0.2) μm, when the Dg50 of the alumina particle powder is configured as 10z μm, and
- a Dg90 of the alumina particle powder is greater than or equal to 10(z+0.2) μm, when the Dg50 of the alumina particle powder is configured as 10z μm.
Dependencies are inferred from the claim text.