The invention provides a
tin-
germanium-
arsenic alloy material, a method for preparing the same and application thereof. The
alloy material consists of the following components in weight percentage: 0.05 to 5 percent of Ge, 1 to 10 percent of As, and the balance being Sn. The preparation method comprises the following steps: in the range of the weight percentage, the high-purity
tin,
germanium and
arsenic materials are weighed up; according to the order of
arsenic,
germanium and
tin, the materials are placed in a
quartz crucible, and the
quartz crucible is placed in a
high pressure reaction kettle; the reaction kettle is pumped vacuum and filled with
argon, and the
temperature and pressure of the reaction kettle are controlled to melt the tin and the germanium and make arsenic vapor enter the inner part of the tin-germanium melt
mass to form an intermediate
alloy; the intermediate alloy is cooled down to obtain tin-germanium-arsenic intermediate alloy
ingot; and according to the weight percentage, the obtained intermediate alloy
ingot and the remained tin and germanium are melted together and cast to obtain the tin-germanium-arsenic alloy material. The tin-germanium-arsenic alloy material is the basic alloy material for preparing high-quality
tunnel diode, in which the tin-germanium-arsenic alloy material plays a role of an
electrode electrodes, transforms P<+> to N<+> to form N<+>P<+> and a narrow
space charge area and can be used to prepare
vaporization plating materials as well as
sputtering target materials.