
The willingness of a bank to give you an educational loan will depend on what they see as employment prospects for the course they are funding. The bank is well within its rights to deny a loan to this PhD course, after such an assessment. You will have to provide them adequate information so that the decision can be made in your favour.
For funding education, banks tend to prefer shorter duration courses, like an MBA with a campus placement, rather than longer tenure PhD courses. But you can still try your luck. Public sector banks give more education loans than private banks. If your university has high credentials, foreign banks could be interested. Several educational loans for large amounts require guarantees and collaterals, so check with the bank. Educational loans are repayable in instalments only after the borrower has begun to earn money to repay it. If you already have credentials and papers, the university will be willing to offer you fellowships to fund your studies. Most PhDs are funded by fellowships, grants for research and by tutorial earnings of the candidates. Explore these options before going for a loan.