"high shear" here refers to the priniciple by which powders/liquids are mixed in a mixer.... It is not being used to describe the property of powder.

So, I think it'll be okay to use "高せん断力" (similar to "high temperature").

FYI

From Glova
high shear mixer 高剪断の混合機
high shear condition 高剪断条件

Manufacture of shaped articles from refractory powder - Patent 4898701
Ordinary clays, such as the kaolinitic clays ball clay and china clay, may be included in the refractory powder to improve its plasticity under high shear, ...
www.freepatentsonline.com/4898701.html - 26k - Cached - Similar pages - Note this
More results from www.freepatentsonline.com »

Process for making polytetrafluoroethylene-aluminum composite and ...
The inventive process uses Teflon powder and aluminum powder. ... Mixing in high shear mixers eliminates the problems associated with such powder ...
www.patentstorm.us/patents/6547993-description.html - 22k - Cached - Similar pages - Note this

Chemical Engineering Science : Prediction of impeller torque in ...
Prediction of impeller torque in high shear powder mixers. P. C. Knighta, J. P. K. Seville Corresponding Author Contact Information ...
linkinghub.elsevier.com/retrieve/pii/S0009250901001142 - Similar pages - Note this