plotting – Plot a contour of concentration profile for a sphere

Assuming a linear concentration profile in a particle(sphere), I managed to make a SliceContourPlot3D for 2 linear concentration functions(a function of radius). I met some problems here:

  1. There are some strange curve appeared on the surface of the sphere. Others are on the back side.


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  1. Is it possible to unify the barlegend or gradient color? The maximum concentration for Fig.2 is 10, corresponding to color level below 10 in Fig.1. Is there a way to color it as shows in Fid.1?


enter image description here

  1. I tried to make the ContourPlot for this sphere, but failed.
    expr1=TransformedField("Spherical"->"Cartesian", 50/0.001 r,{r,(Theta),(CurlyPhi) }->{x,y,z})
    expr2=TransformedField("Spherical"->"Cartesian", 10/0.001 r,{r,(Theta),(CurlyPhi) }->{x,y,z})