"expanded demand" is a correct and usable phrase in written English.
You can use it to talk about an increase in demand. For example, you could say "The new product is experiencing an expanded demand due to its popularity".
The advent of the CAFE standards lowered the cost of motoring and predictably expanded demand.
C — capacity — is about ensuring that the right infrastructure is in place to meet the expanded demand.
Formed by Erik Prince, a reclusive heir to a car parts fortune and former Navy Seal, the company profited from the hugely expanded demand for military training and security that followed the attacks on New York and Washington.
In the Korean telecommunication market, the expanded demand for smart devices and the heralding of the 4G mobile broadband networks have increased the use of mobile applications and web services, with strengthened competition among advertising industrial players.
Recently Samsung announced it was ramping up its 256Gb 3-bit per cell V-NAND product to meet expanded demand.
This large expanded demand represents an opportunity for other Caribbean destinations to substitute for the implicit protection they have been deriving from the restriction.
The Millennium Development Goals (MDGs) were seen as defining the urgency of the overall task, but with the expanded demands of the MDGs also offering substantial additional capital through the International Financing Facility for Immunisation (IFFIm), proposed by the Task Force on Innovative International Financing for Health Systems.
There is an expanding demand for medical staff, hospital beds, and modern equipment.
Now, because of underinvestment, mismanagement and rapidly expanding demand, it is seriously short of generating capacity.
It isn't a highly populated urban area with expanding demand.
"You have to look at how to expand demand in the long term," he said.
