Volume fraction of phases (%)

Sample (Nb content)

Nominal Composition

Bi-2223 (%)

Bi-2212 (%)

A (x = 0.00)

Bi1.65Pb0.35Sr2Ca2Cu3O10+δ

63.7

36.3

B (x = 0.05)

Bi1.65Pb0.3Nb0.05Sr2Ca2Cu3O10+δ

64.8

35.2

C (x = 0.15)

Bi1.65Pb0.2Nb0.15Sr2Ca2Cu3O10+δ

56.4

43.6

D (x = 0.25)

Bi1.65Pb0.1Nb0.25Sr2Ca2Cu3O10+δ

46.2

53.8

E (x = 0.35)

Bi1.65Nb0.35Sr2Ca2Cu3O10+δ

48.7

51.3