Can Keras be used to build clustering models The keras.wrappers.scikit_learn module can be used to build KerasClassifier model.
Can Keras be used to build clustering models?
If it can be, are there any examples for that?
Yes, you can use Keras to build clustering algorithms. Recalling that Keras is a high-level api for Tensorflow or Theano, and that you can build a K-means algorithm (very well known clustering technique) in Tensorflow, you should be able to build it in Keras. Example (in tensorflow):https://learningtensorflow.com/lesson6/.

Nevertheless, sklearn has in-built clustering algorithms like K-means or Gaussian Mixture Models, so at first, I think a better approach is using these sklearn funcionalities.