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BaCoO3 based perovskite type ceramic oxygen-permeable membrane material with Sn, Fe doped at B position

A perovskite-type, oxygen-permeable membrane technology, applied in semi-permeable membrane separation, membrane technology, oxygen production, etc., can solve the problems of poor stability of oxygen-permeable membrane materials, and achieve the effect of good phase structure stability

Inactive Publication Date: 2008-09-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the poor stability of the oxygen-permeable film material containing Co element, in BaCoO 3 The B site is doped with different proportions of Fe and Sn elements

Method used

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  • BaCoO3 based perovskite type ceramic oxygen-permeable membrane material with Sn, Fe doped at B position
  • BaCoO3 based perovskite type ceramic oxygen-permeable membrane material with Sn, Fe doped at B position
  • BaCoO3 based perovskite type ceramic oxygen-permeable membrane material with Sn, Fe doped at B position

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: BaCo 0.7 Fe 0.2 sn 0.1 o 3-δ Synthesis by solid phase reaction

[0018] With 29.601g of BaCO 3 (analytical pure), 2.261g of SnO 2 (analytical pure), 2.396g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.2 sn 0.1 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ball milled again with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1180°C in a high-temperature furnace, and after 10 hours of heat preservation, a dense BaCo 0.7 Fe 0.2 sn 0.1 o 3-δ sample. T...

Embodiment 2

[0019] Example 2: BaCo 0.7 Fe 0.22 sn 0.08 o 3-δ Synthesis by solid phase reaction

[0020] With 29.601g of BaCO 3 (analytical pure), 1.808g of SnO 2 (analytical pure), 2.635g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.22 sn 0.08 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ball milled again with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1180°C in a high-temperature furnace, and after 10 hours of heat preservation, a dense BaCo 0.7 Fe 0.22 sn 0.08 o 3-δ samp...

Embodiment 3

[0021] Example 3: BaCo 0.7 Fe 0.18 sn 0.12 o 3-δ solid phase reaction method

[0022] With 29.601g of BaCO 3 (analytical pure), 2.713g of SnO 2 (analytical pure), 2.156g of Fe 2 o 3 (analytical pure), 26.154g of CoCH 3 COOH (analytical pure) is the raw material, that is, according to BaCo 0.7 Fe 0.18 sn 0.12 o 3-δ The mixture was prepared in the ratio of the elements, using alcohol as the medium, milled in an agate ball mill jar for 6 hours, mixed evenly, and dried in an oven. After the dried material was calcined at 1000°C for 10 hours, it was ground into powder with an agate mortar, and then ball milled with agate balls as the grinding medium for 4 hours, and then put into a drying oven for drying. After the drying is complete, grind it evenly in a mortar, add 1.0wt.% PVA to mix and dry it, and then dry press it in a steel casting mold. The pressed sample strip was heated to 1180°C in a high-temperature furnace, and after 10 hours of heat preservation, a dense B...

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Abstract

The present invention relates to Sn-Fe-substitution-on-B-site BaCoO3-base calcium-titanium mineral ceramic oxygen-transmitting film material, and relates to inorganic oxygen-transmitting film material. The present invention is characterized in that B site of BaCo0.7Fe0.3O3-Delta is doped with Sn element; the chemical formula of the material is BaCo0.7Fe0.3-xSnxO3-Delta, wherein, x is equal to 0.06 to 0.30. The structure of the oxygen-transmitting film material with B site being doped with Sn element is compact; moreover, the crystal interface width is narrow, the crystal interface is clean and free from the foreign matter; the oxygen transmittance is high; the stability is good, thus being the oxygen-transmitting film material with excellent performance, so that the oxygen-transmitting film material can be used for the consecutive oxygen supply for partial oxidation reaction of the methane, and for the oxygen separation and purification in other gases containing the oxygen.

Description

technical field [0001] The invention relates to an inorganic oxygen-permeable membrane material, in particular to a BaCoO doped with Sn at the B site 3 Based perovskite ceramic oxygen permeable membrane material. Background technique [0002] Oxygen permeable membrane is a kind of mixed conductor material with oxygen ion conductivity and electronic conductivity at high temperature, especially at a temperature greater than 700 °C. Due to the high mixed conductivity of oxygen ions and electrons, such materials can complete the oxygen transport process without additional circuits. The oxygen-permeable membrane material is applied to the membrane reactor of the partial oxidation reaction of methane, and the oxygen in the air or other oxygen-containing gas at one end of the membrane material is conducted to the other end of the membrane material in the form of lattice vibration under the action of the oxygen concentration gradient It then reacts with methane to form synthesis g...

Claims

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Application Information

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IPC IPC(8): C04B35/32C01B13/02B01D71/02
Inventor 赵海雷程云飞丁伟中高峰王冶峰张翼
Owner UNIV OF SCI & TECH BEIJING
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