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AssigneeNGK Insulators, Ltd.
InventorsShinji Kawasaki, Makoto Murai, Yasufumi Aihara
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A process for the production of a lanthanum chromite film, including the steps of preparing a plasma spray powder by mixing 1-15 parts by weight of powdery chromium oxide powder to 100 parts by weight of powdery lanthanum chromite, this lanthanum chromite having a composition ratio of A sites to B-sites being in a range of 1:1 to 1:0.9, forming a plasma sprayed film by plasma spraying the plasma spray powder onto a substrate, and forming the lanthanum chromite film by heat treating the resulting plasma sprayed film. The plasma spray powder may be produced by preparing a mixed powder by adding 1-15 parts by weight of powdery chromium oxide to 100 parts by weight of a synthesis powder capable of producing the lanthanum chromite film by heat treatment, the synthesis powder containing at least chromium oxide and lanthanum chromite and the lanthanum chromite film having a composition ratio of A-sites to B-sites being in a range of 1:1 to 1:0.9, obtaining a synthesized product by heating the mixed powder, and granulating the synthesized product.
A process for the production of a lanthanum chromite film, said process comprising the steps of preparing a plasma spray powder by mixing 1-15 parts by weight of powdery chromium oxide to 100 parts by weight of powdery lanthanum chromite, said lanthanum chromite having a composition ratio of A-sites to B-sites being in a range of 1:1 to 1:0.9, forming a plasma sprayed film by plasma spraying said plasma spray powder onto a substrate, and forming the lanthanum chromite film by heat treating the resulting plasma sprayed film.
A process for producing a lanthanum chromite film, said process comprising the steps of preparing a mixed powder by adding 1-15 parts by weight of powdery chromium oxide to 100 parts by weight of a synthesis powder capable of producing said lanthanum chromite film by heat treatment, said synthesis powder containing at least chromium oxide and lanthanum oxide and said lanthanum chromite film having a composition ratio of A-site to B-sites being in a range of 1:1 to 1:0.9, obtaining a synthesized product by heating said mixed powder, preparing a plasma spray powder by granulating said synthesized product, forming a plasma sprayed film onto a substrate by plasma spraying said plasma spray powder onto said substrate, and forming the lanthanum chromite film by heat treating the resulting plasma sprayed film.
A process for producing a lanthanum chromite film, said process comprising the steps of preparing a mixed powder by adding 1-15 parts by weight of powdery chromium oxide to 100 parts by weight of a raw material powder capable of producing said lanthanum chromite film by heat treatment, said raw material powder containing at least chromium oxide and lanthanum oxide and said lanthanum chromite film having a composition ratio of A-sites to B-sites being in a range of 1:1 to 1:0.9, obtaining a plasma spray powder by granulating said mixed powder, forming a plasma sprayed film onto a substrate by plasma spraying said plasma spray powder onto said substrate, and forming the lanthanum chromite film by heat treating the resulting plasma sprayed film.
Dependencies are inferred from the claim text.