The invention discloses a high-temperature sheet-type
tantalum capacitor and a manufacturing method of the high-temperature sheet-type
tantalum capacitor. The manufacturing method of the high-temperature sheet-type
tantalum capacitor comprises the steps that an
anode is designed, namely, the weight of tantalum
powder is calculated according to formation
voltage which is 2-6 times of the nominal
voltage, and a porous matrix
anode tantalum core is formed through
sintering;
dielectric film is formed, namely,
aqueous solution with
electrolyte being
boric acid or
nitric acid or
phosphoric acid or
ammonium dihydrogen
phosphate or
ethylene glycol is selected as formation solution, and
tantalum pentoxide dielectric film which is uniform in thickness and good in uniformity is formed on the surface of the
anode tantalum core; a
manganese dioxide
cathode is manufactured, namely, the anode tantalum core is put into manganous
nitrate with different proportions, repeated operation is conducted, and a
manganese dioxide
cathode layer is formed; the high-temperature sheet-type
tantalum capacitor is assembled. The high-temperature sheet-type
tantalum capacitor can
resist high temperature of 200 DEG C, has good high-temperature-resisting capacity, and is small in size, good and stable in performance, and capable of being widely applied to the fields of power supply control parts of
airplane noses or guided missiles or the like and the fields of
petroleum drilling electronic circuits and the like.