Method to manufacture BaPb.sub.1-x BI.sub.x O.sub.3 single crystal
AssigneesShinichi Hirano, Shigehara Naka, Seiko Instruments Inc.
InventorsShinichi Hirano, Shigeharu Naka
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Abstract
The present invention is the method of manufacturing BaPb.sub.1-x Bi.sub.x O.sub.3 single crystal utilized as a super-conductor. In this method, the starting material and the growing substrate are mounted inside an autoclave, in which an aqueous solution comprised of acid, alkali aqueous solution or peroxide is charged. With the hydrothermal synthesis that applies necessary temperature and pressure to the starting material, the BaPb.sub.1-x Bi.sub.x O.sub.3 single crystal is obtained and the composition reappearance characteristic is improved. The strain is removed by growing at a temperature below the transition point. Also, by removing such defects as heat strain, the crystallization ability and super-conducting are improved.
Claims18
A method of manufacturing BaPb.sub.1-x BiO.sub.3 single crystal wherein BaPb.sub.1-x Bi.sub.x O.sub.3 is grown by hydrothermal synthesis which applies heat and pressure to the crystal within an aqueous solution, the hydrothermal synthesis being carried out at a temperature above 350.degree. C.
A method of manufacturing BaPb.sub.1-x Bi.sub.x O.sub.3 single crystal comprising:
- providing a starting material comprised of BaCO.sub.3, PbO.sub.2 and Bi.sub.2 O.sub.3 mixed together in the desired proportions;
- and hydrothermally synthesizing the starting material within an aqueous solution at a temperature above 350.degree. C. to effect the growth of BaPb.sub.1-x Bi.sub.x O.sub.3 single crystal.
Dependencies are inferred from the claim text.