a mixed oxide of iron and chromium

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Nanostructured chromiumiron mixed oxides: Physicochemical

Chromiumiron bulk mixed oxides were prepared by a solgel method using 2propanol solutions of the nitrate salts of both metals and propylene oxide as a gelation promoter. Composites with iron content of 10 50 and 90 were prepared and compared with the corresponding pure oxides Fe 2 O 3 and Cr 2 O 3 .

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Iron and chromium mixedoxide nanocomposites Request PDF

Ironchromium oxide NPs both in crystalline 10 1114 and amorphous 48 states were obtained using the same procedures as used to obtain single iron oxide such as ultrasonic radiation 48

Process of coreduction of iron and chromium oxides with

1. The phase composition of the solid products yielded by the reduction of iron scale mixed with chromic oxide and of a rhombohedral Fe2O3 Cr2O3 solid solution at temperatures of 950 and 1100 C was studied by xray diffraction. It is shown that at 950 C no chromium is reduced from either the oxide mixture or the solid solution while the iron oxides are fully reduced in 12 h. 2. The

A mixed oxide of iron and chromium FeOCr2O3 is fused with

A mixed oxide of iron and chromium FeOCr2O3 is fused with sodium carbonate in the presence of air to form a. yellow coloured compound A . On acidifi ion the compound A forms an orange coloured compound B which is a strong oxidising agent.

A mixed oxide of iron and chromium FeOCr2O3 is fused with

A mixed oxide of iron and chromium F e O C r 2 O 3 is fused with sodium carbonate in the presence of air to form a yellow coloured compound A . On acidifi ion the compound A forms an orange coloured compound B which is a strong oxidising agent. i. Identify the compounds A and B . ii. Write balanced chemical equation for each step.

A mixed oxide of iron and chromium FeO.Cr 2 O 3 is fused

A mixed oxide of iron and chromium FeO.Cr 2 O 3 is fused with sodium carbonate in the presence of air to form a yellow coloured compound A . On acidifi ion the compound A forms an orange coloured compound B which is a strong oxidising agent. Identify i the compound A and B ii Write balanced chemical equation for each step.

A mixed oxide of iron and chromium is fused with sodium carbonate

A mixed oxide of iron and chromium is fused with sodium carbonate in presence of air to form a yellow coloured compound A . On acidifi ion the compound A forms an orange coloured compound B which is a strong oxidizing agent. ltbrgt i Identify the compounds A and B ltbrgt ii Write balanced chemical equation for each step.

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Preparation of a mixedphase pigment based on iron oxide and

We claim 1. A process for the preparation of a mixedphase pigment based on iron oxide and chromium oxide wherein a mixture of a transparent iron oxide having an orthorhombic bipyramidal crystal structure and a chromium III hydroxide which is prepared by precipitation with an alkali onto the transparent iron oxide is heated at from 600 to 1100 C. and then comminuted and then worked up.

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