NOVELTY - A deoxygenation membrane module (100) consists of a deoxygenation membrane element (10) equipped with deoxygenation membrane (14), and metallic components (20,30). A seal portion (40) is formed in the junction of membrane element and metallic component. The seal portion is made of crystal-containing glass containing crystal component in glass matrix, and consists of glass main portion in which stabilized zirconia crystals, and cristobalite crystals and/or leucite crystals are precipitated.    USE - Deoxygenation membrane module is used in oxygen purification units, in oxidation reaction apparatus for selective partial oxidation reaction of hydrocarbons in gas-to-liquid technique of manufacturing synthetic liquid fuels e.g. methanol, or fuel cell, and in diaphragm reactors.    ADVANTAGE - The deoxygenation membrane module uses a sealing material having excellent heat resistance, and which provides excellent airtightness even under high temperature of 1200-1300 degrees C. The module has excellent deoxygenation efficiency, economical efficiency, and durability.    DETAILED DESCRIPTION - A deoxygenation membrane module consists of a deoxygenation membrane element equipped with deoxygenation membrane consisting of oxide ceramics of perovskite structure which is an oxygen ion conductor, provided on a porous base material (12), and metallic components joined to the deoxygenation membrane element. A seal portion which interrupts the gas distribution in the junction is formed in the junction of membrane element and metallic component. The seal portion is made of crystal-containing glass containing crystal component in glass matrix, and consists of glass main portion in which stabilized zirconia crystals, and cristobalite crystals and/or leucite crystals are precipitated. The glass main portion comprises (in %mass by oxide conversion) silica (40-70), alumina (10-20), sodium oxide (8-20), potassium oxide (8-20), magnesium oxide (0-3), and calcium oxide (0-3). The content of stabilized zirconia crystals is 3-30 %mass. The ratio with respect to thermal expansion coefficients of the metallic component and crystal-containing glass is 0.7-1.    INDEPENDENT CLAIMS are included for the following:    (1) sealing material;    (2) manufacture of sealing material, which involves preparing glass-making feedstock powder, melting the raw material powder to obtain glass, pulverizing glass, adding stabilized zirconia powder, and depositing the crystals in glass matrix by carrying out crystallization of the mixed powder; and    (3) manufacture of deoxygenation membrane module, which involves preparing a membrane element by coating film of membrane material on porous base material, preparing metallic components, connecting membrane element and metallic component using the sealing material, baking the arrangement at calcination temperature region of coating film, and mutually joining.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the deoxygenation membrane module.    Deoxygenation membrane element (10)    Porous base material (12)    Deoxygenation membrane (14)    Metallic components (20,30)    Seal portion (40)    Deoxygenation membrane module (100)