Are you thinking about publishing your dissertation? If so, you have several options to consider. Some doctoral students are successful at finding a book publisher. This, however, usually requires significant work on the author's part to refocus the manuscript for an audience beyond the dissertation committee. Other options include writing articles, conference papers, or book chapters based on your dissertation.
Here is some useful advice on how to proceed:
If you are interested in publishing your research in an academic journal it is important to identify the journal(s) that are most likely to accept your manuscript for publication. This will require some research on your part but it will be well worth it. One thing to know is that the publishing industry for academic journals is quite concentrated.
Each of their websites offers guidance on picking the appropriate journal(s) to submit your manuscript.